Featured Publications

# equal contribution          * corresponding author 

First author & corresponding author

# equal contribution          * corresponding author 

[33] Incorporating Potassium Citrate to Improve the Performance of Tin-Lead Perovskite Solar Cells

L. Chen, C. Li, Y. Xian, S. Fu, A. Abudulimu, D.-B. Li, J. D. Friedl, Y. Li, S. Neupane, M. S. Tumusange, N. Sun, X. Wang, R. J. Ellingson, M. J. Heben, N. J. Podraza, Z. Song*, and Y. Yan 

Adv. Energy Mater., DOI: https://doi.org/10.1002/aenm.202301218, (2023).

[32] Highly efficient bifacial single-junction perovskite solar cells

Q. Jiang#, Z. Song#, R. C. Bramante, P. F. Ndione, R. Tirawat, J. J. Berry, Y. Yan and K. Zhu

Joule, DOI: 10.1016/j.joule.2023.06.001 (2023).

[31] All-Perovskite Tandem Photoelectrodes for Unassisted Solar Hydrogen Production

Z. Song*, C. Li, L. Chen, K. Dolia, S. Fu, N. Sun, Y. Li, K. Wyatt, J. L. Young, T. G. Deutsch and Y. Yan, 

ACS Energy Lett.  8, 2611-2619 (2023).

[30] Engineering Perovskite Precursor Inks for Scalable Production of High-Efficiency Perovskite Photovoltaic Modules

J. Chung, S.-W. Kim, Y. Li, T. Mariam, X. Wang, M. Rajakaruna, M. M. Saeed, A. Abudulimu, S. S. Shin, K. N. Guye, Z. Huang, R. J. E. Westbrook, E. Miller, B. Subedi, N. J. Podraza, M. J. Heben, R. J. Ellingson, D. S. Ginger, Z. Song*, and Y. Yan

Adv. Energy Mater.  13, 2300595 (2023).

[29] Operando Characterizations of Light-Induced Junction Evolution in Perovskite Solar Cells

C. Xiao#, Y. Zhai#, Z. Song#, K. Wang, C. Wang, C.-S. Jiang, M. C. Beard, Y. Yan and M. Al-Jassim

ACS Appl. Mater. Interfaces  15, 20909-20916 (2023). 

[28] Post-Annealing Treatment on Hydrothermally Grown Antimony Sulfoselenide Thin Films for Efficient Solar Cells

S. Rijal, A. Adhikari, R. A. Awni, C. Xiao, D.-B. Li, B. Dokken, A. Ellingson, E. Flores, S. S. Bista, D. Pokhrel, S. Neupane, R. E. Irving, A. B. Phillips, K. Jungjohann, C.-S. Jiang, M. Al-Jassim, R. J. Ellingson, Z. Song* and Y. Yan, 

Solar RRL  7, 2201009 (2023).

[27] Scalable Two-Step Production of High-Efficiency Perovskite Solar Cells and Modules

Z. Wu, E. Bi, C. Li, L. Chen, Z. Song* and Y. Yan

Solar RRL  7, 2200571 (2023). 

[26] Perovskite Solar Cells Go Bifacial—Mutual Benefits for Efficiency and Durability

Z. Song,* C. Li, L. Chen, Y. Yan

Advanced Materials, 34, 2106805, 2022.

[25] Templated Growth and Passivation of Vertically Oriented Antimony Selenide Thin Films for High-Efficiency Solar Cells in Substrate Configuration

S. Rijal, D.-B. Li, R. A. Awni, C. Xiao, S. S. Bista, M. K. Jamarkattel, M. J. Heben, C.-S. Jiang, M. Al-Jassim, Z. Song*, Y. Yan

Advanced Functional Materials, 32, 2110032, 2022.

[24] Mitigating ion migration in perovskite solar cells

E. Bi, Z. Song*,  C. Li, Z. Wu, Y. Yan*

Trends in Chemistry 3, 575-588 (2021).

[23] Assessing the True Power of Bifacial Perovskite Solar Cells under Concurrent Bifacial Illumination

Z. Song*, C. Chen, C. Li,  S. Rijal, L. Chen, Y. Li,  and  Y Yan  

Sustainable Energy Fuels 5, 2865-2870 (2021). 

[22] Influence of Post-selenization Temperature on the Performance of Substrate-Type Sb2Se3 Solar Cells

S. Rijal, D.-B. Li, R. A. Awni, S. S. Bista, Z. Song*, and Y. Yan*

ACS Appl. Energy Mater. 4, 4313–4318 (2021).  

[21] Temperature-dependency of ferroelectric behavior in CH3NH3PbI3 perovskite films measured by the Sawyer–Tower method

A. Zhao, Z. Song*, R. Awni & Y. Yan, 

MRS Advances 6, 613–617 (2021).

[20] Low-bandgap mixed tin–lead iodide perovskites with reduced methylammonium for simultaneous enhancement of solar cell efficiency and stability

C. Li, Z. Song*, C. Chen, C. Xiao, B. Subedi, S. P. Harvey, N. Shrestha, K. K. Subedi, L. Chen, D. Liu, Y. Li, Y.-W. Kim, C.-S. Jiang, M. J. Heben, D. Zhao, R. J. Ellingson, N. J. Podraza, M. Al-Jassim & Y. Yan*

Nature Energy, 5, 768–776, 2020. 

[19] Arylammonium-Assisted Reduction of Open Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration

C. Chen, Z. Song*, C. Xiao, R. A. Awni, C. Yao, N. shrestha, C. Li, S. S. Bista, Y. Zhang, L. Chen, R. J. Ellingson, C.-S. Jiang, M. M. Al-Jassim, G. Fang, and Y. Yan*

ACS Energy Letters, 5, 2560–2568, 2020.

[18] Correlating Hysteresis and Stability with Organic Cation Composition in the Two-Step Solution-Processed Perovskite Solar Cells

Y. Cui, C. Chen, C. Li, L. Chen, S. S. Bista, X. Liu, Y. Li, R. A. Awni, Z. Song* and Y. Yan*

ACS Appl. Mater. Interfaces, 12, 10588–10596, 2020.

[17] High Remaining Factors in the Photovoltaic Performance of Perovskite Solar Cells after High-Fluence Electron Beam Irradiations

Z. Song*, C. Li, C. Chen, J. McNatt, W. Yoon, D. Scheiman, P. P. Jenkins, R. J. Ellingson, M. J. Heben, and Y. Yan*

 The Journal of Physical Chemistry C, 124, 1330–1336, 2020.

[16] Interface Modification of Sputtered NiOx as the Hole-Transporting Layer for Efficient Inverted Planar Perovskite Solar Cells

X. Zheng,# Z. Song,#* Z. Chen,# S. S. Bista, P. Gui, N. Shrestha, C. Chen, C. Li, X. Yin, R. Awni, H. Lei, T. Chen, R. J. Ellingson, Y. Yan and G. Fang*

Journal of Materials Chemistry C, 8, 1972-1980, 2020 

[15] Carrier lifetimes of >1 μs in Sn-Pb perovskites enable efficient all-perovskite tandem solar cells

J. Tong,# Z. Song,# D. H. Kim,# X. Chen, C. Chen, A. F. Palmstrom, P. F. Ndione, M. O. Reese, S. P. Dunfield, O. G. Reid, J. Liu, F. Zhang, S. P. Harvey, Z. Li, S. T. Christensen, G. Teeter, D. Zhao, M. M. Al-Jassim, M. F. A. M. van Hest, M. C. Beard, S. E. Shaheen, J. J. Berry, Y. Yan, K. Zhu

Science,  364, 475-479, 2019.

[14] Charge Compensating Defects in Methylammonium Lead Iodide Perovskite Suppressed by Formamidinium Inclusion

N. shrestha,# Z. Song,# C. Chen, E. Bastola, X. Wang, Y. Yan, and R. J. Ellingson

 The Journal of Physical Chemistry Letters, 11, 121-128, 2019.

[13] Wide-Bandgap, Low-Bandgap, and Tandem Perovskite Solar Cells

Z. Song*, C. Chen, C. Li, R. A. Awni, D. Zhao and Y. Yan*

Semiconductor Science and Technology, 34, 093001, 2019

[12] Dithieno[3,2-b:2′,3′-d]pyrrol-Cored Hole Transport Material Enabling Over 21% Efficiency Dopant-Free Perovskite Solar Cells

X. Yin,# J. Zhou,#  Z. Song,# Z. Dong,  Q. Bao,  N. Shrestha, S. S. Bista, R. J. Ellingson, Y, Yan, W, Tang

Advanced Functional Materials, 29, 1904300, 2019.

[11] Low-Bandgap Mixed Tin-Lead Perovskites and Their Applications in All-Perovskite Tandem Solar Cells

C. Wang,# Z. Song,#  C. Li, D. Zhao, and Y. Yan

Advanced Functional Materials, 29, 1808801, 2019.

[10] Reducing Saturation-Current Density to Realize High-Efficiency Low-Bandgap Mixed Tin–Lead Halide Perovskite Solar Cells

C. Li,# Z. Song,#  D. Zhao,  C. Xiao,  B. Subedi,  N. Shrestha, M. M. Junda,  C. Wang, C.‐S. Jiang,  M. Al‐Jassim, R. J. Ellingson, N. J. Podraza, K. Zhu,  and Y. Yan

Advanced Energy Materials, 9, 1803135, 2019.

[9] Impact of Moisture on Photoexcited Charge Carrier Dynamics in Methylammonium Lead Halide Perovskites

Z. Song, N. Shrestha, S.C. Watthage, G.K. Liyanage, Z.S. Almutawah, R.H. Ahangharnejhad, A.B. Phillips, R.J. Ellingson, and M.J. Heben

The Journal of Physical Chemistry Letters, 9, 6312, 2018.

[8] Probing the Origins of Photodegradation in Organic-Inorganic Metal Halide Perovskites with Time-Resolved Mass Spectrometry

Z. Song,  C. Wang,  A. B. Phillips,  C. R. Grice,  D. Zhao,  Y. Yu,  C. Chen,  C. Li,  X. Yin,  R. J. Ellingson,  M. J. Heben  and  Y. Yan 

Sustainable Energy & Fuels, 2, 2460-2467, 2018.

[7] Synergistic effects of thiocyanate additive and cesium cations on improving the performance and initial illumination stability of efficient perovskite solar cells

C. Wang,#  Z. Song,#  Y. Yu,  D. Zhao,  R. Awni,  C. Grice,  N. Shrestha,  R. Ellingson,  X. Zhao  and  Y. Yan 

Sustainable Energy & Fuels, 2435-2441, 2018.

[6] A Technoeconomic Analysis of Perovskite Solar Module Manufacturing with Low-Cost Materials and Techniques

Z. Song, C. Mcelvany, A. B. Phillips, I. Celik, P. Krantz, S. C. Watthage, G. K. Liyanage, D. Apul and M. J. Heben 

Energy & Environmental Science, 10, 1297-1305, 2017. (PDF)

[5] Imaging the Spatial Evolution of Degradation in Perovskite/Si Tandem Solar Cells after Exposure to Humid Air

Z. Song, J. Werner, S. C. Watthage, F. Sahli, N. Shrestha, S. De Wolf, B. Niesen, A. B. Phillips, C. Ballif, R. J. Ellingson, M. J. Heben,

IEEE Journal of Photovoltaics, 7, 1563-1568, 2017. (PDF)

[4] Probing Photocurrent Nonuniformities in the Subcells of Monolithic Perovskite/Silicon Tandem Solar Cells

Z. Song, J. Werner, N. Shrestha, F. Sahli, S. De Wolf, B. Niesen, S. C. Watthage, A. B. Phillips, C. Ballif, R. J. Ellingson and M. J. Heben

The Journal of Physical Chemistry Letters, 7, 5114-5120, 2016. (PDF)

[3] Perovskite Solar Cell Stability in Humid Air: Partially Reversible Phase Transitions in the PbI2-CH3NH3I-H2O System

Z. Song, A. Abate, S. C. Watthage, G. K. Liyanage, A. B. Phillips, U. Steiner, M. Graetzel and M. J. Heben

Advanced Energy Materials, 6, 1600846, 2016. (PDF)

[2] Pathways toward High Performance Perovskite Solar Cells: A Review on Recent Advances of Organometal Halide Perovskites for Photovoltaic Applications

Z. Song, S. C. Watthage, A. B. Phillips, and M. J. Heben

Journal of Photonics for Energy, 6, 022001, 2016. (PDF)

[1] Impact of Processing Temperature and Composition on the Formation of Methylammonium Lead Iodide Perovskites

Z. Song, S. C. Watthage, A. B. Phillips, B. L. Tompkins, R. J. Ellingson, and M. J. Heben

Chemistry of Materials , 27, 4612–4619, 2015. (PDF)

Contributing author

[71] Urbach Energy and Open-Circuit Voltage Deficit for Mixed Anion–Cation Perovskite Solar Cells

B. Subedi, C. Li, C. Chen, D. Liu, M. M. Junda, Z. Song, Y. Yan, N. J. Podraza

ACS Applied Materials & Interfaces,  2022, 14, 7796–7804 (2022).

[70] Impact of lifetime on the levelized cost of electricity from perovskite single junction and tandem solar cells,

R. H. Ahangharnejhad, A. B. Phillips, Z. Song, I. Celik, K. Ghimire, P. Koirala, R. J. Ellingson, R. W. Collins, N. J. Podraza, Y. Yan, M. J. Heben, 

Sustainable Energy Fuels 6, 2718-2726 (2022).

[69] Bio-sensitized solar cells built from renewable carbon sources

C. C. Villarreal, S. Monge, D. Aguilar, A. Tames, N. Araya, M. Aguilar, S. Ramakrishna, V. Thavasi, Z. Song, A. Mulchandani, R. Venkatesan, 

Materials Today Energy, 23, 100910 (2022).

[68] Urbach Energy and Open-Circuit Voltage Deficit for Mixed Anion–Cation Perovskite Solar Cells

B. Subedi, C. Li, C. Chen, D. Liu, M. M. Junda, Z. Song, Y. Yan, N. J. Podraza

ACS Applied Materials & Interfaces, DOI: 10.1021/acsami.1c19122 (2022).

[67] Optical properties of thin film Sb2Se3 and identification of its electronic losses in photovoltaic devices

N. K.Jayswal, S. Rijal, B. Subedi, I. Subedi, Z. Song, R. W. Collins, Y. Yan, N. J.Podraza

Solar Energy 228, 38-44 (2021).

[66] Effects of Cu Precursor on the Performance of Efficient CdTe Solar Cells

S. S. Bista, D.-B. Li, R. A. Awni, Z. Song, K. K. Subedi, N. Shrestha, S. Rijal, S. Neupane, C. R. Grice, A. B. Phillips, R. J. Ellingson, M. J. Heben, J. V. Li, Y. Yan

ACS Applied Materials & Interfaces 13, 38432-38440 (2021).

[65] Protecting Perovskite Solar Cells against Moisture-Induced Degradation with Sputtered Inorganic Barrier Layers

R. H. Ahangharnejhad, Z. Song, T. Mariam, J. J. Gardner, G. K. Liyanage, Z. S. Almutawah, B. MM Anwar, M. Junda, N. J. Podraza, A. B. Phillips, Y. Yan, M. J. Heben

ACS Applied Energy Materials 4, 7571–7578 (2021).

[64] On the design and performance of InGaN/Si double-junction photocathodes

I. A. Navid, S. Vanka, R. A. Awni, Y. Xiao, Z. Song, Y. Yan, Z. Mi, 

Applied Physics Letters 118, 243906 (2021).

[63] Impact of Humidity and Temperature on the Stability of the Optical Properties and Structure of MAPbI3, MA0. 7FA0. 3PbI3 and (FAPbI3) 0.95 (MAPbBr3) 0.05 Perovskite Thin Films

M. S. Tumusange, B. Subedi, C. Chen, M. M. Junda, Z. Song, Y. Yan, N. J. Podraza,
Materials 14, 4054 (2021).

[62] Low-energy room-temperature optical switching in mixed-dimensionality nanoscale perovskite heterojunctions

J. Hao, Y.-H. Kim, S. N. Habisreutinger, S. P. Harvey, E. M. Miller, S. M. Foradori,  M. S. Arnold, Z. Song, Y. Yan, J. M. Luther, and J. L. Blackburn

Science Advances 7, eabf1959, 2021.

[61] Enabling Bifacial Thin Film Devices by Developing a Back Surface Field using CuxAlOy

K. K. Subedi, A. B. Phillips, N. Shrestha, F. K. Alfadhili, A. Osella, I. Subedi, R. A. Awni, E. Bastola, Z. Song, D.-B. Li, R. W. Collins, Y. Yan, N. J. Podraza, M. J. Heben, R. J. Ellingson

Nano Energy 83, 105827, 2021.

[60] Optical and Electronic Losses Arising from Physically Mixed Interfacial Layers in Perovskite Solar Cells

B. Subedi, Z. Song, C. Chen, C. Li, K. Ghimire, M. M. Junda, I. Subedi, Y. Yan, N. J. Podraza 

ACS Applied Materials & Interfaces 13, 4923-4934, 2021. 

[59] Cryogenic spatial–temporal imaging of surface photocarrier dynamics in MAPbI3 films at the single grain level

Z. Liu, J.-M. Park, L. Luo, D. Cheng, C. Huang, R. H. J. Kim, C. Vaswani,  Z. Song,  Y. Yan,  Y. Yao, K.-M. Ho, and  J. Wang

AIP Advances, 10, 125108, 2020.

[58] InGaN/Si Double-Junction Photocathode for Unassisted Solar Water Splitting

S. Vanka, B. Zhou, R. A. Awni, Z. Song, F. A. Chowdhury, X. Liu, H. Hajibabaei, W. Shi, Y. Xiao, I. A. Navid, A. Pandey, R. Chen, G. A. Botton, T. W. Hamann, D. Wang, Y. Yan, and Z. Mi

ACS Energy Lett., 5, 3741–3751, 2020.

[57] Toward Ideal Hole Transport Materials: A Review on Recent Progress in Dopant-Free Hole Transport Materials for Efficient and Stable Perovskite Solar Cells

X. Yin, Z. Song, Z. Li  and W. Tang

Energy & Environmental Science, 13, 4057-4086, 2020.  

[56] Environmental Impact per Energy Yield for Bifacial Perovskite Solar Cells Outperforms Crystalline Silicon Solar Cells

R. H. Ahangharnejhad, W. Becker, J. Jones, A. Anctil, Z. Song, A. Phillips, M. Heben, and I. Celik

 Cell Reports Physical Science, 1, 100216, 2020.

[55] Narrow-Bandgap Mixed Lead and Tin-Based 2D Dion–Jacobson Perovskites Boost the Performance of Solar Cells

W. Ke, C. Chen, I. Spanopoulos, L. Mao, I. Hadar, X. Li, J. M. Hoffman, Z. Song, Y. Yan, M. G. Kanatzidis

Journal of the American Chemical Society, 142,  15049–15057, 2020.

[54] Emerging Photovoltaic (PV) Materials for a Low Carbon Economy

I. Celik, R. H. Ahangharnejhad, Z. Song, M. J. Heben, and D. Apul

Energies, 13, 4131, 2020.

[53] Very high VOC and FF of CdTe thin‐film solar cells with the applications of organo‐metallic halide perovskite thin film as a hole transport layer

K. P. Bhandari, F. K. Alfadhili, E. Bastola, S. C. Watthage, Z. Song, G. K. Liyanage, A. B. Phillips, M. J. Heben, R. J. Ellingson

Progress in Photovoltaics, 28, 1024-1033, 2020.

[52] Decreasing the resolution limit of laser beam induced current measurements below the beam size without confocal optics: Determining laser scribe widths

R. H. Ahangharnejhad, Z. Song, J. L. DeWitt, A. B. Phillips, B. R. Lumbrezer, C. E. Wickersham, M. J. Heben

Solar Energy Materials and Solar Cells, 215, 110660, 2020.

[51] CuSCN as the Back Contact for Efficient ZMO/CdTe Solar Cells

D.-B. Li, Z. Song, S. S. Bista, F. K. Alfadhili, R. A. Awni, N. Shrestha, D. Rhiannon, A. B. Phillips, M. J. Heben, R. J. Ellingson, F. Yan, Y. Yan

Materials, 13, 1991, 2020.

[50] Maximize CdTe solar cell performance through copper activation engineering

D.-B. Li, S. S.Bista, Z. Song, R. A. Awni, K. K.Subedi, N. Shrestha, P. Pradhan, L. Chen, E. Bastola, C. R. Grice, A. B. Phillips, M. J. Heben, R. J. Ellingson and Y. Yan

Nano Energy, 73, 104835, 2020.

[49] Ultrafast Control of Excitonic Rashba Fine Structure by Phonon Coherence in the Metal Halide Perovskite CH3NH3PbI3

Z. Liu, C. Vaswani, X. Yang, X. Zhao, Y. Yao, Z. Song, D. Cheng, Y. Shi, L. Luo, D.-H. Mudiyanselage, C. Huang, J.-M. Park, R. H. J. Kim, J. Zhao, Y. Yan, K.-M. Ho, and J. Wang

Physical Review Letters, 124, 157401, 2020.

[48] Coherent band-edge oscillations and dynamic longitudinal-optical phonon mode splitting as evidence for polaronic coupling in perovskites

Z Liu, C Vaswani, L Luo, D Cheng, X Yang, X Zhao, Y Yao, Z Song, R Brenes, R Kim, J Jean, V Bulovic, Y Yan, K-M Ho, J Wang 

Physical Review B, 101, 115125, 2020.

[47] Sputtered indium tin oxide as a recombination layer formed on the tunnel oxide/poly-Si passivating contact enabling the potential of efficient monolithic perovskite/Si tandem solar cells

W. Yoon, D. Scheiman, Y.-W. Ok, Z. Song, C. Chen, G. Jernigan, A. Rohatgi, Y. Yan, P. Jenkins

Solar Energy Materials and Solar Cells, 210, 110482, 2020

[46] Influence of Charge Transport Layers on Capacitance Measured in Halide Perovskite Solar Cells

R. A. Awni, Z. Song, C. Chen, C. Li, C. Wang, M. A.Razooqi, L. Chen, X. Wang, R. J. Ellingson, J. V. Li, and Y. Yan

Joule, 4, 644-657, 2020

[45] Solution‐Processed High‐Quality Cesium Lead Bromine Perovskite Photodetectors with High Detectivity for Application in Visible Light Communication

R. Liu,  J. Zhang,  H. Zhou,  Z. Song,  Z. Song, C. R. Grice,  D. Wu, L. Shen,  and H. Wang

Advanced Optical Materials, 8, 1901735, 2020

[44] Effects of intrinsic and atmospherically induced defects in narrow bandgap (FASnI3)x(MAPbI3)1−x perovskite films and solar cells

B. Subedi, C. Li,  M. M. Junda,  Z. Song,  Y. Yan, and N. J. Podrazaa

The Journal of Chemical Physics, 152, 064705, 2020

[43] Helicity-dependent terahertz photocurrent and phonon dynamics in hybrid metal halide perovskites

D. Cheng, Z. Liu, L. Luo, C. Vaswani, J.-M. Park,  Y. Yao,  Z. Song, C. Huang, D.-H. Mudiyanselage,  R. H. J. Kim, Y. Yan, K.-M. Ho, and  J. Wang

The Journal of Chemical Physics, 151, 244706, 2019

[42] Optical properties of Bacteriorhodopsin-Gold Bionano Interfaces

S. Das, T. C. Asmara, A. Patra, Z. Song, S. S. Bista, P. Somasundaran, A. Rusydi, B. Barbiellini, and R. Venkatesan 

Journal of Physical Chemistry C, 123, 26516-26521, 2019

[41] Influences of buffer material and fabrication atmosphere on the electrical properties of CdTe solar cells

R. A. Awni, D.‐B. Li,  Z. Song,  S. S. Bista, M. A. Razooqi,  C. R. Grice, L. Chen, G. K. Liyanage, A. B. Phillips, M. J. Heben, R, J. Ellingson, J. V. Li, and Y. Yan

Progress in Photovoltaics, 27, 1115-1123, 2019

[40] Bacteriorhodopsin Enhances Efficiency of Perovskite Solar Cells

S. Das, C. Wu, Z. Song, Y. Hou, R. Koch, P. Somasundaran, S. Priya, B. Barbiellini-Amidei, R. Venkatesan

ACS Applied Materials & Interfaces, 11, 30728-30734, 2019. 

[39] Dithieno[3,2-b:2’,3’-d]pyrrole Cored p-Type Semiconductors Enabling 20% Efficiency Dopant-Free Perovskite Solar Cells

J. Zhou, X. Yin, Z. Dong, A. Ali, Z. Song, N. Shrestha, S. S. Bista, Q. Bao, R. J. Ellingson, Y. Yan and W. Tang

Angew. Chem. Int. Ed., 58, 13717-13721, 2019,.

[38] Irradiance and temperature considerations in the design and deployment of high annual energy yield perovskite/CIGS tandems

R. H. Ahangharnejhad,  A. B. Phillips,  K. Ghimire,  P. Koirala,  Z. Song, H. M. Barudi,  A. Habte, M. Sengupta,  R. J. Ellingson,  Y. Yan,  R. W. Collins,  N. J. Podrazaa and  M. J. Heben

Sustainable Energy Fuels, 3, 1841-1851, 2019.

[37] Low-Reflection, (110)-Orientation-Preferred CsPbBr3 Nanonet Films for Application in High-Performance Perovskite Photodetectors

R. Liu,  H. Zhou,  Z. Song,  X. Yang,  D. Wu,  Z. Song,  H. Wang  and  Y. Yan

Nanoscale, 11, 9302-9309, 2019

[36] Achieving a high open-circuit voltage in inverted wide-bandgap perovskite solar cells with a graded perovskite homojunction

C. Chen, Z. Song, C. Xiao, D. Zhao, N. Shrestha, C. Li, G. Yang, F.Yao, X. Zheng, R. J. Ellingson, C.-S. Jiang, M. Al-Jassim, K. Zhu, G. Fang, and Y. Yan

Nano Energy, 61, 141-147, 2019

[35] Improving performance and stability of planar perovskite solar cells through grain boundary passivation with block copolymer

C. Wang, Z. Song, D. Zhao, R. A. Awni,  C. Li,  N. Shrestha,  C. Chen,  X. Yin,  D. Li,  R. J. Ellingson,  X. Zhao, X. Li,  and Y. Yan

Solar RRL, 3, 1900078, 2019

[34] Eliminating S-Kink to Maximize the Performance of MgZnO/CdTe Solar Cells

D. Li, Z. Song, R. A. Awni, S. S. Bista, N. Shrestha, C. R. Grice, L. Chen, G. K. Liyanage, M. A. Razooqi, A. B. Phillips, M. J. Heben, R. J. Ellingson, and Y. Yan

ACS Appl. Energy Mater., 2, 2896-2903, 2019

[33] Perovskite—a Perfect Top Cell for Tandem Devices to Break the S–Q Limit

Z. Wang, Z. Song , Y. Yan, S. (F.) Liu, D. Yang

Advanced Science, 6, 1801704, 2019

[32] From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives

Z. Xiao, Z. Song, Y. Yan

Advanced Materials, DOI: 10.1002/adma.201803792, 2019

[31] Cu3PS4 Nanoparticle Hole Selective Layer for Efficient Inverted Perovskite Solar Cells

X. Yin,  S. A. McClary,  Z. Song,  D. Zhao,  B. K. Graeser,  C. Wang,  N. Shrestha,  X.-M. Wang,  C. Chen,  C. Li,  K. Subedi,  R. J. Ellingson,  W. Tang,  R. Agrawal  and Y. Yan

 Journal of Materials Chemistry A,  7, 4604, 2019

[30] The Effects of Hydrogen Iodide Back Surface Treatment on CdTe Solar Cells

R. A. Awni, D.‐B. Li,  C. R. Grice,  Z. Song,  M. A. Razooqi,  A. B. Phillips, S. S. Bista,  P. J. Roland, F. K. Alfadhili, R, J. Ellingson,  M. J. Heben,  J. V. Li, and Y. Yan

Solar RRL, 3, 1800304, 2018

[29] Efficient two-terminal all-perovskite tandem solar cells enabled by high-quality low-bandgap absorber layers

D. Zhao, C. Chen, C. Wang, M. M. Junda, Z. Song, C. R. Grice, Y. Yu, C. Li, B. Subedi, N. J. Podraza, X. Zhao, G. Fang, R.-G. Xiong, K. Zhu and Y. Yan 

Nature Energy, 3, 1093, 2018.

[28] Self-Powered CsPbBr3 Nanowire Photodetector with a Vertical Structure

H. Zhou, Z. Song, C. R. Grice, C. Chen, J. Zhang, Y. Zhu, R. Liu, H. Wang, and Y. Yan

Nano Energy, 53, 880-886, 2018.

[27] Pressure-Assisted Annealing Strategy for High-Performance Self-Powered All-Inorganic Perovskite Microcrystal Photodetectors

H. Zhou, Z. Song, C. R. Grice, C. Chen, X. Yang, H. Wang, and Y. Yan 

The Journal of Physical Chemistry Letters, 9, 4714-4719, 2018.

[26] Band Tail Engineering in Kesterite Cu2ZnSn(S,Se)4 Thin-Film Solar Cells with 11.8% Efficiency

M. G. Gang, S. W. Shin, M. P. Suryawanshi, U. V. Ghorpade, Z. Song, J. S. Jang, J. H. Yun, H. Cheong, Y. Yan, and J. H. Kim

The Journal of Physical Chemistry Letters, 9, 4555-4561, 2018.

[25] Binary hole transport materials blending to linearly tune HOMO level for high efficiency and stable perovskite solar cells

X. Yin, C. Wang, D. Zhao, N. Shrestha, C. R. Grice, L. Guan, Z. Song, C. Chen, C. Li, G. Chi, B. Zhou, J. Yu, Z. Zhang, R. J. Ellingson, J. Zhou, Y. Yan, and W. Tang

Nano Energy, 51, 680-687, 2018.

[24] Nanocomposite (CuS)x(ZnS)1-x thin film back contact for CdTe solar cells: Toward a bifacial device

K. K. Subedi, E. Bastola, I. Subedi, Z. Song, K. P. Bhandari, A. B. Phillips, N. J. Podraza, M. J. Heben, R. J. Ellingson

Solar Energy Materials and Solar Cells, 186, 227-235, 2018.

[23] Selective Cd Removal From CdTe for High-Effiiency Te Back-Contact Formation

S. C. Watthage, A. B. Phillips, G. K. Liyanage, Z. Song, J. M. Gibbs, F. K. Alfadhili, R. B. Alkhayat, R. H. Ahangharnejhad, Z. S. Almutawah, K. P. Bhandari, R. J. Ellingson, and M. J. Heben

IEEE Journal of Photovoltaics, 8 (4), 1125-1131, 2018.

[22] Optical design of perovskite solar cells for applications in monolithic tandem configuration with CuInSe2 bottom cells

R. H. Ahangharnejhad, Z. Song, A. B. Phillips, S. C. Watthage, Z. S. Almutawah, D. R. Sapkota, P. Koirala, R. W. Collins, Y. Yan, M. J. Heben

MRS Advances, 3, 3111-3119, 2018.

[21] Enhanced Grain Size and Crystallinity in CH3NH3PbI3 Perovskite Films by Metal Additives to the Single-Step Solution Fabrication Process

Z. S. Almutawah, S. C. Watthage, Z. Song, R. H. Ahangharnejhad, K. K. Subedi, N. Shrestha, A. B. Phillips, Y. Yan, R. J. Ellingson, M. J. Heben

MRS Advances, 3, 3237-3242, 2018. 

[20] Double Coating for the Enhancement of the Performance in a MA0.7FA0.3PbBr3 Photodetector

H. Zhou, Z. Song, C. Wang, C. R. Grice, Z. Song, D. Zhao, H. Wang, and Y. Yan

ACS Photonics, 5, 2100-2105, 2018.

[19] Stable and Efficient CdS/Sb2Se3 Solar Cells Prepared by Scalable Close Space Sublimation

D. B. Li, X. Yin, C. R. Grice, L. Guan, Z. Song, C. Wang, C. Chen, K. Li, A. J. Cimaroli, R. A. Awni, D. Zhao, H. Song, W. Tang, Y. Yan, J. Tang

Nano Energy, 49, 346-353, 2018.

[18] Self-Powered All-Inorganic Perovskite Microcrystal Photodetectors with High Detectivity

H. Zhou, J. Zeng, Z. Song, C. R. Grice, C. Chen, Z. Song, D. Zhao, H. Wang, and Y. Yan

The Journal of Physical Chemistry Letters, 9, 2043−2048, 2018.

[17] Life cycle analysis of metals in emerging photovoltaic (PV) technologies: A modeling approach to estimate use phase leaching

I. Celik, Z. Song, A. B. Phillips, M. J. Heben, and D. Apul

Journal of Cleaner Production, 186, 632-639, 2018.

[16] 4-Terminal All-Perovskite Tandem Solar Cells Achieving Power Conversion Efficiencies Exceeding 23%

D. Zhao, C. Wang, Z. Song, Y. Yu, C. Chen, X. Zhao, K. Zhu, and Y. Yan

ACS Energy Lett., 3 (2), 305-306, 2018.

[15] Energy Payback Time (EPBT) and Energy Return on Energy Invested (EROI) of Perovskite Tandem Photovoltaic Solar Cells

I. Celik, A. B. Phillips, Z. Song, Y. Yan, R. J. Ellingson, M. J. Heben, and D. Apul

IEEE Journal of Photovoltaics, 1 (8), 305-309, 2018.

[14] Effect of non-stoichiometric solution chemistry on improving the performance of wide-bandgap perovskite solar cells

M. Yang, D. H. Kim, Y. Yu, Z. Li, O. G. Reid, Z. Song, D. Zhao, C. Wang, L. Li, Y. Meng, T. Guo, Y. Yan, K. Zhu

Materials Today Energy, 7, 232-238, 2018.

[13] High-Yield Production of Fatty Nitriles by One-Step Vapor-Phase Thermocatalysis of Triglycerides

Y. Shirazi, H. Tafazolian, S. Viamajala, S. Varanasi, Z. Song, and M. J. Heben

ACS Omega, 2 (12), 9013–9020, 2017. 

[12] Cost-Effective Hole Transporting Material for Stable and Efficient Perovskite Solar Cells with Fill Factors up to 82% 

L. Guan, X. Yin, D. Zhao, C. Wang, Q. An, J. Yu, N. Shrestha, C. Grice, R. Awni, Y. Yu, Z. Song, J. Zhou, W. Meng, F. Zhang, R. Ellingson, J. Wang, W. Tang and Y. Yan

Journal of Materials Chemistry A, 5, 23319-23327, 2017.

[11] Water Vapor Treatment of Low-temperature Deposited SnO2 Electron Selective Layers for Efficient Flexible Perovskite Solar Cells

C. Wang, L. Guan, D. Zhao, Y. Yu, C. R. Grice, Z. Song, R. Awni, J. Chen, J. Wang, X. Zhao, and Y. Yan

ACS Energy Lett., 2 (9), 2118–2124, 2017.

[10] Environmental Analysis of Perovskites and Other Relevant Solar Cell Technologies in a Tandem Configuration

I. Celik, A. B. Phillips, Z. Song, Y. Yan, R. J. Ellingson, M. J. Heben, and D. Apul  

Energy & Environmental Science,10, 1874-1884 , 2017. (PDF)

[9] Impact of Divalent Metal Additives on the Structural and Optoelectronic Properties of CH3NH3PbI3 Perovskite Prepared by the Two-Step Solution Process

S. C. Watthage, Z. Song, N. Shrestha, A. B. Phillips, G. K. Liyanage, P. J. Roland, R. J. Ellingson, and M. J. Heben

MRS Advances, 2, 1183, 2017.

[8] Enhanced Grain Size, Photoluminescence, and Photoconversion Efficiency with Cadmium Addition during the Two-Step Growth of CH3NH3PbI3

S. C. Watthage, Z. Song, N. Shrestha, A. B. Phillips, G. K. Liyanage, P. J. Roland, R. J. Ellingson, and M. J. Heben

ACS Applied Materials & Interfaces, 9 (3), 2334–2341, 2016. (PDF)

[7] High speed, intermediate resolution, large area laser beam induced current imaging and laser scribing system for photovoltaic devices and modules

A. B. Phillips, Z. Song, J. L. DeWitt, J. M. Stone, P. W. Krantz, J. M. Royston, R. M. Zeller, M. R. Mapes, P. J. Roland, M. D. Dorogi, S. Zafar, G. T. Faykosh, R. J. Ellingson, M. J. Heben

Review of Scientific Instruments, 87 (9), 093708, 2016. (PDF)

[6] Life Cycle Assessment (LCA) of perovskite PV cells projected from lab to fab 

I. Celik, Z. Song, A. Cimaroli, Y. Yan, M. J. Heben, and D. Apul

Solar Energy Materials and Solar Cells, 156, 157-169, 2016. (PDF)

[5] Substrate Configuration, Bifacial CdTe Solar Cells Grown Directly on Transparent Single Wall Carbon Nanotube Back contacts

R. R. Khanal, A. B. Phillips, Z. Song, Y. Xie, H. P. Mahabaduge, M. D. Dorogi, S. Zafar, G. T. Faykosh, and M. J. Heben

Solar Energy Materials and Solar Cells, 157, 35-41, 2016. (PDF)

[4] Simultaneous pinhole protection and back contact formation for CdTe solar cells with spray-deposited single wall carbon nanotubes layers

A. B. Phillips, R. R. Khanal, Z. Song , S. C. Watthage, K. R. Kormanyos, and M. J. Heben

Applied Physics Letters, 107, 253901, 2015. (PDF)

[3] Properties of Silicon Quantum Dots embedded in Silicon Nitride Deposited By Pulse and Rf Co Sputtering

X. Chen, Z. Song, W. Yang, L. Duan, L. Zhang and P. Yang 

Journal of Nanoelectronics and Optoelectronics, 9 (4), 534-537, 2014.

[2] Wiring-up carbon single wall nanotubes to polycrystalline inorganic semiconductor thin films: Low-barrier, copper-free back contact to CdTe solar cells

A. B. Phillips, R. R. Khanal, Z. Song, R. M. Zartman, J. L. DeWitt, J. M. Stone, P. J. Roland, V. V. Plotnikov, C. W. Carter, J. M. Stayancho, R. J. Ellingson, A. D. Compaan, and M. J. Heben

Nano Letters, 13 (11), pp. 5224–5232, 2013. (PDF)

[1] Density behaviors of Ge nanodots self-assembled by ion beam sputtering deposition

X. Fei, T. Yang, Z. Song and P. Yang

Chinese Physics B, 22, 058104, 2013. 

Book Chapters

[1] Chapter 3 - Evolution of Perovskite Solar Cells

S. C. Watthage, Z. Song, A. B. Phillips, and M. J. Heben

Perovskite Photovoltaics, Basic to Advanced Concepts and Implementation, Elsevier, 2018.

https://www.sciencedirect.com/science/article/pii/B9780128129159000034

[2] Chapter 18 - All Perovskite Tandem Solar Cells

Z. Song and Y. Yan

Hybrid Perovskite Solar Cells: Characteristics and Operation, Wiley, 2021.

https://doi.org/10.1002/9783527825851.ch18

Patents

Inexpensive, Earth-Abundant, Tunable Hole Transport Material For CdTe Solar Cells 

R. J. Ellingson, K. P. Bhandari, M. J. Heben, S. Watthage, Z. Song

US Patent App. 15/880,807, 2018  

Conference proceedings

[35] Lead-Free Metal Halide Perovskites for Solar Cell Applications: A Theoretical Perspective

Z. Xiao, Z. Song, Y. Yan, 

in IEEE 47th IEEE Photovoltaic Specialists Conference (PVSC), 0025-0027, 2020.

[34] 21.1% Efficient Space Perovskite/Si Four-Terminal Tandem Solar Cells

W. Yoon, Z. Song, C. Chen, D. Scheiman, Y. Yan

in IEEE 47th IEEE Photovoltaic Specialists Conference (PVSC), 1552-1556, 2020.

[33] Solution Processed CuCl treatment for efficient CdS/CdTe Solar Cells

S. S. Bista, D.-B. Li, Z. Song, R. A. Awni, S. Rijal, C. Lei, C. R. Grice, M. K. Jamarkattel, A. B. Phillips, M. J. Heben, R. J. Ellingson, Y. Yan,

in IEEE 47th IEEE Photovoltaic Specialists Conference (PVSC), 2619-2622, 2020.

[32] Monolithic Two-Terminal All-Perovskite Tandem Solar Cells with Power Conversion Efficiency Exceeding 21%

Z. Song, D. Zhao, C. Chen, R. H. Ahangharnejhad, C. Li, K. Ghimire, N. J. Podraza, M. J. Heben, K. Zhu, Y. Yan, 

in IEEE 46th Photovoltaic Specialists Conference (PVSC), 0743-0746, 2019.

[31] Effects of Fabrication Atmosphere on Bulk and Back Interface Defects of CdTe Solar Cells with CdS and MgZnO Buffers

R. A Awni, D.-B. Li, Z. Song, S. S. Bista, M. A. Razooqi, C. R. Grice, L. Chen, G. K. Liyanage, C. Li, A. B. Phillips, M. J. Heben, R. J. Ellingson, J. V. Li, Y. Yan 

in IEEE 46th Photovoltaic Specialists Conference (PVSC), 0177-0181, 2019.

[30] Cost analysis of thin film tandem solar cells using real world energy yield modelling

R. H. Ahangharnejhad, A. B. Phillips, I. Celik, Z. Song, Y. Yan, M. J. Heben

in IEEE 46th Photovoltaic Specialists Conference (PVSC), 1260-1263, 2019.

[29] ZnTe Back Buffer Layer to Enhance the Efficiency of CdS/CdTe Solar Cells

S. S. Bista, D.-B. Li, C. Lei, C. Grice, R. A. Awni, Z. Song, Y. Yan

in IEEE 46th Photovoltaic Specialists Conference (PVSC), 0499-0502, 2019.

[28] Get rid of S-kink in MZO/CdTe Solar Cells by Performing CdCl2 Annealing without Oxygen

D.-B. Li, Z. Song, S. S. Bista, R. A. Awni, C. R. Grice, L. Chen, Y. Yan, 

in IEEE 46th Photovoltaic Specialists Conference (PVSC), 3015-3017, 2019.

[27] Operando Microscopy Characterization of Perovskite Solar Cells

C. Xiao, C. Wang, C.-S. Jiang, Z. Song, Y. Yan, M. Al-Jassim, 

in IEEE 46th Photovoltaic Specialists Conference (PVSC), 0638-0641, 2019.

[26] Manufacturing Cost Analysis of Perovskite Solar Modules in Single-Junction and All-Perovskite Tandem Configuration

Z. Song, A. B. Phillips, I. Celik, G. K. Liyanage, D. Zhao, D. Apul, Y. Yan, M. J. Heben 

in IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC), 1134-1138, 2018.

[25] Impact of Epoxy Encapsulation on Device Stability of Large-Area Laser-Patterned Perovskite Solar Cells

Z. Song, C. Wang, D. Zhao, C. Chen, X. Yin, C. Li, N. J. Podraza, M. J. Heben, Y. Yan

 in IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC), 1139-1142, 2018. (The Best Poster Award)

[24] A Review of China's PV-Generated Electricity Pricing Policy

Y. Zhang and Z. Song, 

in IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC), 2435-2440, 2018.

[23] Modeling the Performance of CdTe Solar Cells with a CH3NH3Pb(I1-XBrX)3-like Back Buffer Layer

G. K. Liyanage, A. B. Phillips, F. K. Alfadhili, Z. Song, K. P. Bhandari, R. J. Ellingson, M. J. Heben, 

in IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC),1503-1506, 2018.

[22] Electrical Impedance Characterization of CdTe Thin Film Solar Cells with Hydrogen Iodide Back Surface Etching

R. A. Awni, C. R. Grice, D.-B. Li, Z. Song, Y. Yan, 

in IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC),1878-1881, 2018.

[21] Use of Single Wall Carbon Nanotube films doped with Triethyloxonium Hexachlorantimonate as a Transparent Back Contact for CdTe Solar Cells

F. K. Alfadhili, J. M. Gibbs, G. K. Liyanage, P. W. Krantz, S. C. Watthage, Z. Song, A. B. Phillips, M. J. Heben,

 in IEEE 44th Photovoltaic Specialists Conference (PVSC), 730-734, 2017.

[20] Influence of Mono- and Di-valent Metal Additives on Morphology and Charge Carrier Dynamics of CH3NH3PbI3 Perovskite

N. Shrestha ; S. C. Watthage, Z. Song, P. J. Roland, A. B. Phillips, M. J. Heben, R. J. Ellingson

in IEEE 44th Photovoltaic Specialists Conference (PVSC), 1030-1033, 2017.

[19] Applications of hybrid organic-inorganic metal halide perovskite thin film as a hole transport layer in CdTe thin film solar cells

K. P. Bhandari, S. C. Watthage, Z. Song, A. Phillips, M. J. Heben, R. J. Ellingson,

in IEEE 44th Photovoltaic Specialists Conference (PVSC), 748-751, 2017.

[18]  CdS1-xSexWindow Layer for CdTe Prepared by the Exchange of S with Se in CdS Films

G. K. Liyanage, A. B. Phillips, Z. Song, S. C. Watthage, R. H. Ahanzhamejhad, M. J. Heben

 in IEEE 44th Photovoltaic Specialists Conference (PVSC), 170-174, 2017.

[17] Novel, Facile Back Surface Treatment for CdTe Solar Cells

S. C. Watthage, G. K. Liyanage, Z. Song, F. K. Alfadhili, R. B. Alkhayat, K. P. Bhandari, R. J. Ellingson, A. B. Phillips, M. J. Heben, 

in IEEE 44th Photovoltaic Specialists Conference (PVSC), 815-819, 2017.

[16] In-Situ Observation of Moisture-Induced Degradation of Perovskite Solar Cells Using Laser-Beam Induced Current

Z. Song, A. Abate, S. C. Watthage, G. K. Liyanage, A. B. Phillips, U. Steiner, M. Graetzel, and M. J. Heben

in IEEE 43rd Photovoltaic Specialists Conference (PVSC), 2016.

[15] Investigation on the Nucleation and Growth Mechanisms of Perovskite Formation in the Two-Step Solution Process

S. C. Watthage, Z. Song, G. K. Liyanage, A. B. Phillips, and M. J. Heben

in IEEE 43rd Photovoltaic Specialists Conference (PVSC), 2016.

[14] Life Cycle Toxicity Analysis of Unstable PV Cells

I. Celik, Z. Song, M. J. Heben, Y. Yan, and D. Apul

in IEEE 43rd Photovoltaic Specialists Conference (PVSC), 2016.

[13] RF-Sputtered Cd2SnO4 for Flexible Glass CdTe Solar Cells G. K. Liyanage, C. R. Grice, A. B. Phillips, Z. Song, S. C. Watthage, N. D. Franzer, S. Garner, Y. Yan, M. J. Heben

in IEEE 43rd Photovoltaic Specialists Conference (PVSC), 2016.

[12] Investigation of degradation mechanisms of perovskite-based photovoltaic devices using laser beam induced current mapping

Z. Song, S. C. Watthage, A. B. Phillips, G. K. Liyanage, R. R. Khanal, and M. J. Heben

in SPIE Optics and Photonics, 956107, 2015.

[11] Spatially Resolved Characterization of Solution Processed Perovskite Solar Cells Using the LBIC Technique

Z. Song, S. C. Watthage, B. L. Tompkins, G. K. Liyanage, A. B. Phillips, R. J. Ellingson and M. J. Heben

in IEEE 42nd Photovoltaic Specialists Conference (PVSC), 1-5, 2015.

[10] Carbon Nanotube Reinforced Cu Metal Matrix Composites for Current Collection from Space Photovoltaics

A. B. Phillips, B. L. Tompkins, Z. Song, R. R. Khanal, G. K. Liyanage, N. D. Gapp, D. M. Wilt, and M. J. Heben 

in IEEE 42nd Photovoltaic Specialists Conference (PVSC), 2015.

[9] Evolution of the Optical Response of Sputtered CdS:O as a Function of Temperature 

A. B. Phillips, J. M. Stone, R. R. Khanal, Z. Song, G. K. Liyanage, C. R. Grice, N. R. Paudel, Y. Yan, and M. J. Heben

in IEEE 42nd Photovoltaic Specialists Conference (PVSC), 2015.

[8] Spray Pyrolysis of Backwall Superstrate CuIn(S,Se)2 Solar Cells

Z. Song, A. B. Phillips, P. W. Krantz, and M. J. Heben 

in IEEE 40th Photovoltaic Specialists Conference (PVSC), 1712-1717, 2014.

[7] Semiconducting Carbon Single-walled Nanotubes as a Cu-Free, Barrier-Free Back Contact for CdTe Solar Cell

R. R. Khanal, A. B. Phillips, Z. Song, V. V. Plotnikov, C. W. Carter, J. M. Stayancho, and M. J. Heben 

in IEEE 40th Photovoltaic Specialists Conference (PVSC), 2348-2353, 2014.

[6] Spray Pyrolysis of CuIn(S,Se)2 Thin Films Using Hydrazine-based Solutions

Z. Song, A. B. Phillips, P. W. Krantz, T. Prabhakar, R. R. Khanal, Y. Xie, J. L. DeWitt, J. M. Stone, and M. J. Heben

MRS Proceedings, 1630, o01-03, 2014.

[5]  The Effect of Wettability on Hydrazine Processed CZTS Thin Films

Z. Song, A. B. Phillips, Y. Xie, R. R. Khanal, J. M. Stone, and M. J. Heben 

MRS Proceedings, 1648, hh03-03, 2014.

[4] The Performance of Nanocrystalline CuInS2/In2S3/SnO2 Heterojunction Solar Cells Prepared by Chemical Spray Pyrolysis

Z. Song, A. B. Phillips, Y. Xie, R. R. Khanal, and M. J. Heben

in IEEE 39th Photovoltaic Specialists Conference (PVSC), 2540-2544, 2013.

[3] Synthesis of Single-Phase Cu2ZnSnS4 Thin Films by Ultrasonic Spray Pyrolysis

T. Prabhakar, Z. Song, M. J. Heben, and Y. Yan

in  IEEE 39th Photovoltaic Specialists Conference (PVSC), 0409-0413, 2013.

[2] CdTe/CdS Thin Film Solar Cells in the Substrate Configuration on a Single-Wall Carbon Nanotube Back Contact

R. R. Khanal, A. B. Phillips, Z. Song,  Y. Xie, H. P. Mahabaduge, M. D. Dorogi, S. Zafar, G. T. Faykosh, and M. J. Heben

in  IEEE 39th Photovoltaic Specialists Conference (PVSC), 1126-1130, 2013.

[1] Plasma Treatment of P/I Interface of Amorphous Silicon Solar Cell to Improve Cell Performance 

C. Chen, X. Deng, and Z. Song

in  IEEE 39th Photovoltaic Specialists Conference (PVSC), 1339-1342, 2013.