[2025]

50. Unveiling NiOx/Perovskite Interfaces: Charge Transport and Device Performance in Perovskite Solar Cells

ACS Applied Materials & Interfaces, 17, 52263-52275 (2025) 

Hanseul Lee, Hye Ri Jung, Sooyeon Pak, Namhee Kwon, Sang Hoon Kim, Junhong Na, Seoyeon Ko, Seokhyun Yoon, Won Mok Kim, Jeung-hyun Jeong, Donghwan Kim, Soohyung Park, Gee Yeong Kim*

49. Unveiling of free carrier transport and ion migration in 2D-3D perovskite mixture for stable optoelectronic devices 

Nanoscale, 17, 15239-15251 (2025) 

Bich Phuong Nguyen, Sarah Su-O Youn, Yeon Soo Kim, Thuy Thi Nguyen, Hakyung Park, Gee Yeong Kim, William Jo

48. Unveiling the Importance of Lead Halide Perovskite Precursor Purity and Its Impact on Stability

ACS Applied Materials & Interfaces, 17, 32521-32529 (2025) 

Hochan Hyun, Jihyun Kim, Yujin Jeong, Hanseul Lee, William Jo, Gee Yeong Kim* 

47. Unveiling Mechanisms of Nano- and Pico-second Laser Scribing of Bilayer Mo Thin Films on Flexible Polyimide for CIGS Solar Photovoltaic Module Fabrication 

Solar RRL 9, 200091 (2025)

Yiting Zheng, Insoo Kim, Zhen Wang, Kabilan Ramkumar, Seungkuk Kuk, Jeonghong Ha, Dongsik Kim, Gee Yeong Kim, Won Mok Kim, Jeung-hyun Jeong, David J. Hwang

[2024]

46. Structural modifications due to Bi-doping in MAPbBr3 single crystals and their impact on electronic transport and stability 

Small, 20, 2407141 (2024) 

S. S.-O. Youn, G. Y. Kim, W. Jo 

45. Autonomous Control of Ion Migration at 𝜶-FAPbI3 Heterointerfaces via Interfacial-Self-Assembled 2D Perovskite

Advanced Energy Materials, 2402117, 1-14 (2024)

J. Kim, J.- S. Park, G. Y. Kim, W. Jo

44. Laser Scribing for Perovskite Solar Modules of Long-Term Stability  

Solar RRL, 8, 2301040 (2024)

Y. Jeong, Y. Kim, H. Lee, S. Ko, S. S. Ham, H. R. Jung, J. H. Choi, W. M. Kim, J. -h. Jeong, S. Yoon, D. J. Hwang*, G. Y. Kim* 

[2023]

43. Cs‐treatments in Kesterite Thin‐Film Solar Cells for Efficient Perovskite Tandems

Small,  20, 2307175 (2023)

S.  K. Hwang, S. J. Park, J. H. Park, J. H. Yoon, J. Y. Cho, D. K. Cho, J. Heo*, G. Y. Kim*, J. Y. Kim*

42. Enhanced Mechanical Stability of CIGS Solar Module with Glass/Polyimide/Indium Tin Oxide for Potentially Flexible Applications ACS Applied Energy Materials, 6, 3745-3755 (2023). 

S. Jeong, S. S. Ham, E. P. Choi, D. J. Hwang*, H Yu, W. M. Kim, G. Y. Kim*, J. –H, Jeong*, 

41. Anisotropic Charge Transport in Cu(In,Ga)Se2 by Heavy Alkali Postdeposition Treatment for Reducing Cell-to-Module Efficiency Loss in Monolithically Integrated Photovoltaic Modules 

Solar RRL, 7, 2300055 (2023) 

H. Yu, E. P. Choi, S. U. Chai, S. Lee, H. K. Park, G. Y. Kim, W. Jo, W. M. Kim, D. Kim, B. Joo, B. K. Min, and J. –H. Jeong 

40. Importance of Low Humidity and Selection of Halide Ions of Octylammonium Halide in 2D–3D Perovskite Solar Cells Fabricated in Air 

Advanced Materials Interfaces,10, 2202249 (2023)

S. Y. Kwon, B. Kang, J. H. Won, C. Y. Lee, K. Hwnag, H. H. Kim, D. Park, W. K Choi, I. S. Kim, G. Y. Kim, Y. H. Jang, P. Lee, S. H. Lim, T. Kim 

[2022]

39. Factors influencing halide vacancy transport in perovskite solar cells 

Discover Materials, 2, 1-8 (2022)

Y. W. Woo, Y. K. Jung, G. Y. Kim, S. Kim, A. Walsh 

38. Understanding the Space-Charge Layer in SnO2 for Enhanced Electron Extraction in Hybrid Perovskite Solar Cells 

 ACS Applied Materials & Interfaces, 14, 48229-48239 (2022)

S. S. O. Youn, J. Kim, J. Na, W. Jo*, G. Y. Kim *

37. Enhanced Charge Transport via Mixed-Dimensional Heterostructures in 2D–3D Perovskites and Their Relevance to Solar Cells 

 ACS Applied Energy Materials, 5, 7965-7976 (2022)

B. P. Nguyen, J. Kim, H. K. Park, W. Jo*, G. Y. Kim* 

36. Photo de-mixing in Dion-Jacobson two-dimensional mixed halide perovskites

Advanced Energy Materials, 12, 2200768 (2022) 

Y. -R. Wang, A. Senocrate, M. Mladenović, A. Dučinskas, G. Y. Kim, U. Röthlisberger, J. V. Milić, D. Moia, M. Grätzel, J. Maier

35. Photo de-mixing in mixed halide perovskites: the roles of ions and electrons 

Journal of Physics Energy, 4, 011001 (2022)

Y. -R. Wang, G. Y. Kim, E. Kotomin, D. Moia, J. Maier

34. Transparent back-junction control in Cu(In,Ga)Se2 absorber for high-efficiency, color-neutral, and semitranparent Solar module

Progress in Photovoltaics, 30, 713-725 (2022)

A. Jeong, J. M. Choi, H. –J. Lee, G. Y. Kim, J. –K. Park, W. M. Kim, S. Kuk, Z. Wang, D. J. Hwang, H. Yu, J. –H. Jeong 

[2021]

33. Chemical tailoring of sodium content for optimization of interfacial band bending and alignment in flexible kesterite solar cells

Solar Energy Materials and Solar Cells, 230, 11243 (2021)

H. K. Park, Y. Cho, J. Kim, G. Y. Kim , W. -L. Jeong, K. -P. Kim, D. -S. Lee, W. Jo

[2020]

32. Unravelling the Behaviour of Dion-Jacobson Layered Hybrid Perovskites in Humid Environments

ACS Energy Letters, 6, 337-344 (2020)

A. Dučinskas, G. Y. Kim, D. Moia, A. Senocrate, T. Schneeberger, B. W. Hua, A. Magrez, J. V. Milić, J. Maier, M. Graetzel 

31. Photo-effect on ion conduction in mixed cation and halide perovskites and implications for photo-demixing

Angewandte Chemie International Edition, 59, 2-9 (2020)

 G. Y. Kim, A. Senocrate, Y. -R. Wang, D. Moia, J. Maier

30. Sodium-assisted passivation of grain boundaries and defects in Cu2ZnSnSe4 thin films

Physical Chemistry Chemical Physics, 22, 7597-7605 (2020). (*co-first authors)

J. Kim*, G. Y. Kim*, T. T. T. Nguyen, S. Yoon, Y. –K. Kim, S. –Y. Lee, M. Kim, D. –H. Cho, Y. –D. Chung, J. –H. Lee, M. –J. Seong, W. Jo

29. Ionically generated built-in equilibrium space charge zones – a paradigm change for lead halide perovskite interfaces

Advanced Functional Materials, 2002426, 1-9 (2020)

G. Y. Kim, A. Senocrate, D. Moia, J. Maier

[2019]

28. Thermochemical stability of hybrid halide perovskites

ACS Energy Letters, 4, 2859-2870 (2019)

A. Senocrate, G. Y. Kim, M. Graetzel, J. Maier

[2018]

27. Slow CH3NH3+ Diffusion in CH3NH3PbI3 under Light Measured by Solid-State NMR and Tracer Diffusion

 Journal of Physical Chemistry C 122, 21803-21806, (2018)

A. Senocrate, T. –Y. Yang, G. Gregori, G. Y. Kim, M. Grätzel, J. Maier

26.Charge Carrier Chemistry in Methylammonium Lead Iodide

Solid State Ionics 321, 69-74, (2018)

A. Senocrate, T. –Y. Yang, G. Gregori, G. Y. Kim, M. Grätzel, J. Maier

25. High photo-conversion efficiency Cu2ZnSn(S,Se)4 thin-film solar cells prepared by compound-precursors and metal-precursors

Solar Energy Materials and Solar Cells 183, 129-136 (2018)

J. Kim, G. Y. Kim, D. H. Son, K. J. Yang, D. H. Kim, J. K. Kang, W. Jo

24. Large tunable photo effect on ion conduction in halide perovskites and implications for photodecomposition

Nature Materials 17, 445-449 (2018)

 G. Y. Kim, A. Senocrate, T. –Y. Yang, G. Gregori, M. Grätzel, J. Maier

23. Interaction of oxygen on stability and transport properties of lead halide perovskites

 Journal of Materials Chemistry A, 6, 10847-10855 (2018)

A. Senocrate, T. Acartürk, G. Y. Kim, R. Merkle, U. Starke, M. Grätzel, J. Maier

[2017]

22. Optical and Scanning Probe Identification of Electronic Structure and Phases in CH3NH3PbBr3 Crystal

 Journal of Physical Chemistry C, 121, 21930–21934 (2017)

H. R. Jung, G. Y. Kim, B. P. Nguyen, H. –J. Jin, W. Jo, T. T. T. Nguyen, S. Yoon, W. S. Woo, C. W. Ahn, S. Cho, I. W. Kim

21. Trapping charges at grain boundaries and degradation of CH3NH3Pb(I1-xBrx)3 perovskite solar cells

Nanotechnology 28, 315402 (2017). (*co-first authors)

B. P. Nguyen, *G. Y. Kim, W. Jo, B. J. Kim, H. S. Jung

20. The Nature of Ion Conduction in Methylammonium Lead Iodide: A Multimethod Approach

 Angewandte Chemie International Edition 56, 7755-7759 (2017)

A. Senocrate, I. Moudrakovski, G. Y. Kim, T. -Y. Yang, G. Gregori, J. Maier, M. Grätzel

19. High photo-conversion efficiency in double-graded Cu(In,Ga)(S,Se)2 thin film solar cells with two-step sulfurization post-treatment

Progress in Photovoltaics: Research and Applications 25, 139-148 (2017)

G. Y. Kim, J. Y. Yang, T. T. T. Nguyen, S. Yoon, J. Nam, D. Lee, D. Kim, M. Kwon, C. –W. Jeon, Y. –K. Kim, S. –Y. Lee, M. Kim, W. Jo

[2016]

18. Effect of post-synthesis annealing duration on grain properties and photovoltaic performance of Organic-Inorganic Hybrid Perovskites

 Journal of Physical Chemistry C 120, 21330-21335 (2016)

D. Kim, G. Y. Kim, C. Ko, S. R. Pae, Y. S. Lee, O. Gunawan, D. F. Ogletree, W. Jo, B. Shin

17. Effects of Mo back-contact annealing on surface potential and carrier transport in Cu2ZnSnS4 thin film solar cells

RSC Advances 6, 103337-1033345 (2016)

J. Kim, G. Y. Kim, W. Jo, K. J. Yang, J. H. Sim, D. H. Kim, J. K. Kang

16. Enhancement of photo-conversion efficiency in Cu2ZnSn(S,Se)4 thin-film solar cells by control of ZnS precursor-layer thickness

Progress in Photovoltaics: Research and Applications 24, 292-306 (2016)

G. Y. Kim, D. -H. Son, T. T. T. Nguyen, S. Yoon, M. Kwon, C. -W. Jeon, D. -H. Kim, J. -K. Kang, and W, Jo

15. Identification of marcasite in pyrite FeS2 thin films and their carrier transport characteristics

RSC Advances 6, 81394-81399 (2016)

J. Kim, G. Y. Kim, H. Moon, S. Yoon, I. W. Seo, Y. S. Lee, D. G. Moon, S. J. Ahn, W. Jo

[2015]

14. Effects of the compositional ratio distribution with sulfurization temperatures in the absorber layer on the defect and surface electrical characteristics of Cu2ZnSnS4 solar cells

Progress in Photovoltaics: Research and Applications 23, 1771-1784 (2015)

K. -J. Yang, J. -H. Sim, D. -H. Son, D. -H. Kim, G. Y. Kim, W. Jo, S. Song, J. H. Kim, D. Nam, H. Cheong, J. -K. Kang

13. Enhancement of photo conversion efficiencies in Cu(In,Ga)(Se,S)2 solar cells fabricated by two-step sulfurization process

Applied Physics Letter 107, 193901 (2015)

J. Y. Yang, J. Nam, D. Kim, G. Y. Kim, W. Jo, Y. Kang, D. Lee

12. Macroscopic and microscopic electrical properties of Cu(In,Ga)Se2 thin-film solar cells with various Ga/(In+Ga) contents

Current Applied Physics 15, S44-S50 (2015)

 G. Y. Kim, W. Jo, H.-J. Jo, D. -H. Kim, J. -K. Kang

11. Optical and surface probe investigation of secondary phases in Cu2ZnSnS4 films grown by electrochemical deposition

Solar Energy Materials and Solar Cells 139, 10 (2015)

 G. Y. Kim, J. R. Kim, W. Jo, K. D. Lee, H. S. Choi, J. Y. Kim, H. Y. Shin, T. T. T. Nguyen, S. Yoon, B. S. Joo, M. Gu, M. Han

10. Efficient Carrier Separation and Intriguing Switching of Bound Charges in Inorganic−Organic Lead Halide Solar Cells

The Journal of Physical Chemistry Letters 6, 2355 (2015)

G. Y. Kim, S. H. Oh, B. P. Nguyen, W. Jo, B. J. Kim, D. G. Lee, H. S. Jung

9. Nanostructured p-type CZTS thin films prepared by facile solution process for 3D p-n junction solar cells

Nanoscale 7, 11182 (2015)

S. -N. Park, S. -J. Sung, J. -H. Sim, K. -J. Yang, D. -K. Hwang, J. Kim, G. Y. Kim, W. Jo, D. -H. Kim, J. -K, Kang

8. Influence of surface properties on the performance of Cu(In,Ga)(S,Se)2 thin film solar cells using Kelvin probe force microscopy

RSC Advances 5, 40719 (2015)

J. Y. Yang, D. Lee, K. S. Huh, S. J. Jung, J. W. Lee, H. C. Lee, D. H. Baek, B. J. Kim, D. Kim, J. Nam, G. Y. Kim, W. Jo

7. Raman scattering studies of Cu2ZnSnS4 thin films: Local distribution of the secondary phase Cu2-xS and the effect of KCN etching on Cu2-xS

 Journal of the Korean Physical Society 66, 117 (2015)

T. T. T. Nguyen, H. -Y. Shin, G. Y. Kim, J. R. Kim, W. Jo, S. Yoon, K. D. Lee, J. Y. Kim

[2014]

6. Nanoscale investigation of surface potential distribution of Cu2ZnSn(S,Se)4 thin films grown with additional NaF layers

Nano Convergence 1, 27 (2014)

G. Y. Kim, J. R. Kim, W. Jo, D. -H. Son, D. -H. Kim, J. -K. Kang

5. Effects of Cu2− xS phase removal on surface potential of Cu2ZnSnS4 thin-films grown by electroplating

Current Applied Physics 14, 1665 (2014)

G. Y. Kim, J. R. Kim, W. Jo, K. D. Lee, J. Y. Kim, T. T. T. Nguyen, S. Yoon

4. Nanoscale observation of surface potential and carrier transport in Cu2ZnSn(S,Se)4 thin-films grown by sputtering-based two-step process

Nanoscale Research Letters 9, 10 (2014)

G. Y. Kim, J. R. Kim, W. Jo, D.-H. Son, D. -H. Kim, J. -K. Kang

3. Surface potential on grain boundaries and intra grains of highly efficient Cu2ZnSn(S,Se)4 thin-films grown by two-step sputtering process

Solar Energy Materials and Solar Cells 127, 129 (2014)

G. Y. Kim, A. R. Jeong, J. R. Kim, W. Jo, D. -H. Son, D. -H. Kim, J. -K. Kang

2. Composition variations in Cu2ZnSnSe4 thin films analyzed by XRD, EDS, PIXE, PL and Raman Spectroscopy

Thin Solid Films 562, 109 (2014)

D. Nam, A. S. Opanasyuk, P. V. Koval, A. H. Ponomaryov, A. R. Jeong, G. Y. Kim, W. Jo, H. Cheong

[2013]

1. Local current transport and surface potential of photovoltaic Cu(In,Ga)Se2 thin-films probed by multi-scale imaging methods

Advances in Natural Sciences: Nanoscience and Nanotechnology  4, 015007 (2013)

A. R. Jeong, G. Y. Kim, W. Jo, D. H. Nam, H. Cheong, H. J. Jo, D. -H. Kim, S. J. Sung, J. K. Kang, D. H. Lee