Research

Technical skills

Fabrication : Plasma enhanced chemical vapor deposition system (PECVD), Thermal & plasma atomic layer deposition system (ALD), spatial atomic layer deposition system, low pressure chemical vapor deposition system (LPCVD), spin coater, thermal evaporator, e-beam evaporator

Characterization:

Electrical: Lifetime testing, photoluminescence imaging, corona-voltage measurement, 4-probe measurement, I-V testing (dark and light), EQE, transmission line measurement, contact resistance measurement
Material: Fourier transform infrared spectroscopy (FTIR), ellipsometry, Raman spectroscopy, UV-photo spectroscopy, contact angle measurement, X-ray photoelectron spectroscopy
Microscopy: Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), atomic force microscopy (AFM) and 3D optical microscope.

Others: Diffusion furnace, furnace annealing, fast firing, rapid thermal annealing, wet bench bath processing, light soaking system

research areas

recombination junctions for tandem Si/perovskite solar cells

Gurleen Kaur, Antonio-de-Jesus Olivares-Vargas, Anatole Desthieux, Mateusz Poplawski, Pavel Bulkin, Dmitry Daineka, Etienne Drahi, Pere Roca i Cabarrocas, Development of tunnel junctions for c-Si/perovskite tandem solar cells : A way forward, Journées Nationales du Photovoltaïque (JNPV 2020), 26 - 29 Jan, 2021, Session: Silicium, 29 Jan 2021, Online (Oral)
Antonio J Olivares, Gurleen Kaur, Mateusz Poplawski, Anatole Desthieux, Pere Roca i Cabarrocas, Optimization of the conductivity and crystalline fraction of p-type µC-SiOx:H films for silicon heterojunction solar cells, 38th European Photovoltaic Solar Energy Conference and Exhibition, 6-10 September, 2021, Silicon Materials and Cells, Session: 2EO.3.5, 10 Sept 2021, Online (Oral), DOI :10.4229/EUPVSEC20212021-2EO.3.5
Antonio J Olivares, Gurleen Kaur, Mateusz Poplawski, Anatole Desthieux, Pere Roca i Cabarrocas, Optimization of the conductivity and crystalline fraction of p-type μc-SiOx:H films for SHJ solar cells, Journées Nationales du Photovoltaïque (JNPV 2021), 30 Nov-3 Dec, 2021, Session: Silicium, 3 Dec 2021, Poster

Overview of c-Si/Perovskite tandem solar cells

carrier selective contacts for silicon solar cells

Gurleen Kaur, Tanmay Dutta, Xin Zheng, Ranjani Sridharan, Aaron Danner, Rolf Stangl, Can charge enhance Selectivity? Passivated contacts using a highly charged AlO_x dielectric tunnel layer- comparing SiO_x/p⁺poly-Si and SiO_x/PEDOT:PSS to AlO_x/p⁺poly-Si and AlO_x/PEDOT:PSS, Solar Energy Materials and Solar Cells, vol. 221, pp. 110857, 2021 (Impact Factor: 6.984)
Gurleen Kaur, Zheng Xin, Ranjani Sridharan, Rolf Stangl, Aaron Danner, Engineering Aluminium oxide polysilicon hole-selective passivated contacts for high efficiency solar cells, Solar Energy Materials and Solar Cells, vol. 218, pp. 110758, 2020 (Impact Factor: 6.984)
Gurleen Kaur, Zheng Xin, Tanmay Dutta, Ranjani Sridharan_,Rolf Stangl, Aaron Danner, Improved silicon oxide/polysilicon passivated contacts for high efficiency solar cells via optimized tunnel layer annealing, Solar Energy Materials and Solar Cells, vol. 217, pp. 110720, 2020 (Impact Factor: 6.984)
Gurleen Kaur, Tanmay Dutta, Zheng Xin, Rolf Stangl, Aaron Danner, Can interface charge enhance carrier selectivity in tunnel layer/poly-Si passivated contacts?, 2020 IEEE 47^th Photovoltaic Specialists Conference (PVSC), Online, 2020
Gurleen Kaur, Tanmay Dutta, Zheng Xin, Zhi Peng Ling, Marvic John Naval, MSM Saifullah, Rolf Stangl, Aaron Danner, Ultra-thin LPCVD SiNx/n+ poly-Si passivated contacts – A possibility?, 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC), Chicago, IL, USA, pp. 2679-2683, 2019
Gurleen Kaur, Tanmay Dutta, Zheng Xin, Zhi Peng Ling, Marvic John Naval, MSM Saifullah, Rolf Stangl, Aaron Danner, Crafting LPCVD SiN_x/n⁺poly-Si electron selective passivated contacts for high efficiency solar cells (Chapter 5 of thesis)
Gurleen Kaur, Tanmay Dutta, Zheng Xin, Rolf Stangl, Aaron Danner, Excellent c-Si surface passivation by ultrathin LPCVD Silicon nitride: A material investigation (Chapter 5 of thesis)
Gurleen Kaur, Xin Zheng, Zhi Peng Ling, Ranjani Sridharan, Rolf Stangl, Aaron Danner, Crafting carrier-selective passivated contacts with ultrathin-dielectric layers: considerations and lessons learnt, 10^th International Conference on Materials for Advanced Technologies (ICMAT-2019), 23-28 June, 2019, Sym B-02 Oxide, Interfaces and thin films, 24 Jun, 17.30-17.45 PM, Marina Bay Sands, Singapore (Oral)
Gurleen Kaur, Tanmay Dutta, Zheng Xin, Zhi Peng Ling, Marvic John Naval, MSM Saifullah, Rolf Stangl, Aaron Danner, Ultra-thin LPCVD SiN_x/n+ poly-Si passivated contacts – A possibility?, 46^th IEEE Photovoltaic Specialists Conference (PVSC 46), 16-21 June 2019, Area 4 : Work Function Engineering, 20 Jun 2019, Chicago, Illinois, US (Best Poster Award)
Cangming Ke, Zheng Xin, Ranjani Sridharan, Gurleen Kaur, Zhi Peng Ling and Rolf Stangl, Investigation of N-Type Contact Passivated Back Junction Silicon Solar Cells by Means of Numerical Device Simulation, 8th International Conference on Silicon Photovoltaics (Silicon PV-2018), 19-21 March 2018, Lausanne, Switzerland (Poster).
Zheng Xin, Zhi Peng Ling, Cangming Ke, E.-C. Wang, Gurleen Kaur, Armin G. Aberle, and Rolf Stangl, Investigation on light soaking enhanced performance of AlO_x passivated silicon solar cells, 27th International Photovoltaics Science and Engineering Conference (PVSEC Japan-2017), 12-17 November 2017, Shiga, Japan (Oral)
Zheng Xin, Zhi Peng Ling, Cangming Ke, E.-C. Wang, Gurleen Kaur, Armin G. Aberle, and Rolf Stangl, Light soaking enhanced performance of ultra-thin aluminium oxide films for passivated-contact silicon solar cells, 27th International Photovoltaics Science and Engineering Conference (PVSEC Japan-2017), 12-17 November 2017, Shiga, Japan (Poster)

(a)-(b) Conceptual schematic of operation of a solar cell - Absorbed photons generate free electrons and holes that are directed towards their respective contacts via the formation of charge carrier selective regions. (c) Schematic of the electron selective surface summarizing the current density parameters, physical mechanisms that drive the carrier selectivity, and the experimentally measured values indicative of the carrier selectivity or surface passivation in this thesis

organic passivated contacts

1. Gurleen Kaur, Tanmay Dutta, Xin Zheng, Ranjani Sridharan, Aaron Danner, Rolf Stangl, Can charge enhance Selectivity? Passivated contacts using a highly charged AlO_x dielectric tunnel layer- comparing SiO_x/p⁺poly-Si and SiO_x/PEDOT:PSS to AlO_x/p⁺poly-Si and AlO_x/PEDOT:PSS, Solar Energy Materials and Solar Cells, vol. 221, pp. 110857, 2021 (Impact Factor: 6.984)
2. Zhi Peng Ling, Zheng Xin, Gurleen Kaur, Cangming Ke, and Rolf Stangl, Ultra-thin ALD-AlOx/PEDOT:PSS hole selective passivated contacts: An attractive low cost approach to increase solar cell performance, Solar Energy Materials and Solar Cells, vol. 185, pp. 477-486, 2018 (Impact Factor: 6.984)
3. Gurleen Kaur, Ranjani Sridharan, Tanmay Dutta, MSM Saifullah, Rolf Stangl, Aaron Danner, Dopant free tunnel layer/PEDOT:PSS hole selective passivated contacts for high efficiency solar cells (Chapter 6 of thesis)
4. Gurleen Kaur, Zhi Peng Ling, Zheng Xin, Rolf Stangl, Aaron Danner, Interface Engineering of ultra-thin ALD AlO_x/ PEDOT:PSS carrier selective contact for high efficiency (> 22%) Si-solar cells, 9^th International Conference on Crystalline Silicon Photovoltaics (Silicon PV 2019), 8-10 April, 2019, Session: Novel Characterization and Modelling, 8 Apr 2019, Leuven, Belgium (Poster)

Comparison of organic PEDOT:PSS material system with conventionally used industrial doped polysilicon layers for passivated contacts. Results indicate that PEDOT:PSS not only provides passivation but also a low-temperature, dopant free route for making selective contacts.

atomic layer deposited (ALD) thin films

1. Gurleen Kaur, Neeraj Dwivedi, Zheng Xin, Baochen Liao, Zhi Peng Ling, Aaron Danner, Rolf Stangl, and Charanjit S. Bhatia, Understanding Surface Treatment and ALD AlO_x Thickness Induced Surface Passivation Quality of c-Si Cz Wafers, IEEE Journal of Photovoltaics, vol. 7, no. 5, pp. 1224-1235, 2017 (Impact Factor: 3.763)
2. Zheng Xin, Zhi Peng Ling, Naomi Nandakumar, Gurleen Kaur, Cangming Ke, Baochen Liao, Armin G. Aberle and Rolf Stangl, Surface passivation investigation on ultra-thin atomic layer deposited aluminum oxide layers for their potential application to form tunnel layer passivated contacts, Japanese Journal of Applied Physics, vol. 56, no. 8S2, p. 08MB14, 2017/07/06 2017 (Impact Factor: 1.471)
3. Gurleen Kaur, Ranjani Sridharan, Xin Zheng, Rolf Stangl, Aaron Danner, Enhancing hole selectivity of passivated contacts via ultrathin dielectric ALD-AlO_x tunnel layer exhibiting high negative interface charge A comparative case study with two capping layers – industrial boron doped polysilicon and low temperature, dopant free PEDOT:PSS, 37^th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC Lisbon - 2020), 7-11 September 2020, Lisbon, Portugal (Oral and EUPVSEC Student Award Finalist 2020)
4. Gurleen Kaur, Neeraj Dwivedi, Zheng Xin, Baochen Liao, Zhi Peng Ling, Rolf Stangl, Aaron Danner, Improvement of the passivation properties of ultra-thin ALD TiO_x and AlO_x films by PEDOT: PSS capping and light soaking, 27^th International Photovoltaic Science and Engineering Conference (PVSEC -27), 12-17 November 2017, Session Code:1ThPo, Shiga, Japan (Poster)
5. Gurleen Kaur, Xin Zheng , Neeraj Dwivedi, Baochen Liao, Ling Zhi Peng, Rolf Stangl, and Charanjit S. Bhatia, Effect of surface treatment and thickness of ultrafast ALD grown AlO_x films on the passivation of c-Si CZ wafers, 26^th International Photovoltaic Science and Engineering Conference (PVSEC -26), 24-28 October 2016, Slot 2.3.9f. 15:15-15:30 PM, Marina Bay Sands, Singapore (Oral)
6. Zheng Xin, Zhi Peng Ling, Naomi Nandakumar, Cangming Ke, Gurleen Kaur, Baochen Liao, Armin G. Aberle and Rolf Stangl, Surface passivation investigation on ultra-thin atomic layer deposited AlO_x layers for their potential application to form tunnel layer passivated contacts, 26^th International Photovoltaics Science and Engineering Conference (PVSEC Singapore-2016), 24-28 October 2016, Marina Bay Sands, Singapore (Oral)
7. Baochen Liao, Neeraj Dwivedi, Gurleen Kaur, Charanjit Singh Bhatia, Excellent c-Si surface passivation by atomic layer deposited TiO₂ films and its optical, material properties, 32^nd European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC Munich - 2016), 20-24 June 2016, Munich, Germany (Poster)

Stacks of c-Si/AlOx samples in a copper ring for interface analysis of AlOx layer. HRTEM image of 100 cycle thick (~10.5 nm thick) AlOx deposited by plasma ALD

HRTEM imaging of thermally grown ALD 2 nm thick TiOx and AlOx

Others

Gurleen Kaur, Md Abul Hossion, Kulasekaran M, Brij Mohan Arora, Synthesis of oriented and passivated polycrystalline silicon films on glass by hot wire chemical vapor deposition, 40th IEEE Photovoltaics Specialists Conference (PVSC -40), 8-13 June 2014, Denver, Colorado, US (Poster)
Gurleen Kaur, Ravinder Singh Sahwney, Milanpreet Kaur; Effect of length on conductance properties of Saturated Alkanes in molecular junctions comprising of Alkanes stringed to gold electrodes, International Conference on Emerging trends in Electronics & Communication (ICETEC-2013), 19-20 December 2013, Amritsar, India (Poster)
Gurleen Kaur, Micromechanical Sensors and their applications, National Level Tech Fest IGNITE-2012, 11-12 October, 2012, Ludhiana, India (Oral)
Gurleen Kaur, Rajan Vohra, Ravinder Singh Sahwney, Generations of Mobile Wireless Technology, National Conference on Challenges in Emerging Computer Technologies -2012, 16-17 May 2020, Kharar, India (Oral)

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