Article
Energy & Fuels
Georg Dost, Hannes Hoeffler, Johannes M. Greulich
Summary: This article presents a method for separating contrasts in luminescence images of silicon solar cells for industrial application, achieving measurement times significantly below one second. The optimized method drastically decreases the required exposure time and eliminates the need for correction using an image under short-circuit conditions.
IEEE JOURNAL OF PHOTOVOLTAICS
(2022)
Article
Energy & Fuels
Shaham Quadir, Mohammad Qorbani, Ying-Ren Lai, Amr Sabbah, Ho-Thi Thong, Michitoshi Hayashi, Cheng-Ying Chen, Kuei-Hsien Chen, Li-Chyong Chen
Summary: In this study, a cation substitution method incorporating Ag ions was introduced to control and passivate defect states in the bandgap of kesterite CZTSe, resulting in reduced density and depth of intrinsic defects. The introduction of 10% Ag-alloyed CZTSe demonstrated the shallowest defect states, less nonradiative recombination, and achieved the best power conversion efficiency of 10.2%.
Article
Chemistry, Multidisciplinary
Bidisha Nath, Sushant K. Behera, Jeykishan Kumar, Arnaud Hemmerle, Philippe Fontaine, Praveen C. Ramamurthy, Debiprosad Roy Mahapatra, Gopalkrishna Hegde
Summary: The surface passivation of oxide-based transport layers using octadecylphosphonic acid has been found to improve charge transport and recombination, resulting in enhanced performance of perovskite solar cells. This research contributes to the development of efficient halide perovskite solar cells by harnessing the favorable architecture of NiOx interfaces.
ADVANCED MATERIALS
(2023)
Review
Physics, Applied
Lihui Song, Zechen Hu, Dehang Lin, Deren Yang, Xuegong Yu
Summary: This paper introduces the application of hydrogenation engineering in crystalline silicon solar cells. By deactivating and inducing defects, hydrogenation can significantly improve the efficiency of passivated emitter rear contact, TOPCon, and SHJ solar cells.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Hanyu Wang, Wenjing Zou, Yukun Ouyang, Xiong Deng, Hu Luo, Juehao Xu, Xingchong Liu, Haimin Li, Xiaoli Gong, Yue Lei, Yafei Ni, Yongshan Peng
Summary: This study introduces fluorinated zwitterions to modify perovskite films, which repairs ionic defects and consolidates the framework, effectively suppressing ion migration, reducing charge recombination, and improving the efficiency and stability of perovskite solar cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Energy & Fuels
Oliver Fischer, Andreas Fell, Christoph Messmer, Raphael Efinger, Florian Schindler, Stefan W. W. Glunz, Martin C. C. Schubert
Summary: To comprehensively characterize the electro-optical properties of perovskite silicon tandem devices, electro- and photoluminescence imaging are combined with illuminated lock-in thermography. This approach, along with numerical simulation models, allows for holistic investigations of device limitations. One remarkable feature observed in the investigated tandem device, showing a low photoluminescence but high electroluminescence signal at local spots, is suggested to originate from the perovskite/C-60 interface.
Article
Energy & Fuels
Michael A. Lloyd, Xiangyu Ma, Austin G. Kuba, Brian E. McCandless, Matthew F. Doty, Robert Birkmire
Summary: Single-crystalline Cu2ZnSnSe4 (CZTSe) solar cells with open circuit voltages reaching 500 mV have been achieved through a combination of composition control and low-temperature thermal ordering treatment. The decrease in Cu content and the implementation of the order anneal lead to an increase in bandgap energy and a decrease in Urbach energy. Admittance spectroscopy for defect characterization is shown to be insufficient due to low-temperature current barriers, while photoluminescence (PL) on crystal surfaces allows for a qualitative comparison of defect landscape between crystal compositions and annealing treatments.
PROGRESS IN PHOTOVOLTAICS
(2022)
Article
Energy & Fuels
Cyril Leon, Pierre Saint-Cast, Andreas Fell, Johannes M. Greulich, Stefan Rein
Summary: The robustness of a method called Fourier-transform photoluminescence (FTPL) is investigated to determine the recombination current-density (J0,met) under the front metallization fingers of silicon solar cells. The method uses a voltage-calibrated photoluminescence imaging setup and does not require any dedicated sample preparation. The results show that the FTPL method can differentiate solar cells that have undergone different metallization conditions and provides similar results compared to other characterization techniques.
Review
Chemistry, Physical
Michele De Bastiani, Anand S. Subbiah, Maxime Babics, Esma Ugur, Lujia Xu, Jiang Liu, Thomas G. Allen, Erkan Aydin, Stefaan De Wolf
Summary: Perovskite/silicon tandem solar cells are high-efficiency and low-cost photovoltaic devices that enhance stability and energy yield by collecting light from both the sunward and rear side.
Article
Nanoscience & Nanotechnology
Davis Unruh, Reza Vatan Meidanshahi, Chase Hansen, Salman Manzoor, Mariana Bertoni, Stephen M. Goodnick, Gergely T. Zimanyi
Summary: By modeling the physics of electronic defect generation in heterojunction Si solar cells, we determined that the performance degradation is mainly controlled by a broad distribution of energy barriers. The development of the SolDeg platform allowed us to track the microscopic dynamics of defect generation and analyze the time-dependent defect density using a stretched exponential analytical form, covering a wide range of time scales.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
R. Krautmann, N. Spalatu, R. Josepson, R. Nedzinskas, R. Kondrotas, R. Grzibovskis, A. Vembris, M. Krunks, I. Oja Acik
Summary: The effect of close-spaced sublimation (CSS) substrate temperature on the growth of antimony trisulfide (Sb2S3) absorber was systematically studied. It was found that a processing temperature of 300°C resulted in crack-free Sb2S3 films with increased presence of (hk1) planes. Temperature-dependent admittance spectroscopy (TAS) and photoluminescence (PL) analysis revealed deep defects with different activation energies and band-to-band and donor-acceptor pair recombinations, respectively.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Energy & Fuels
Rajkumar Sahu, Srikanta Palei, Jaeho Choi, Hyung Yong Ji, Keunjoo Kim
Summary: Low-energy nitrogen ion implantation improved the efficiency of silicon solar cells, but increasing energy and fluence caused cell damage and reduced efficiency. After low-temperature annealing, cell efficiency recovered to a similar level as reference cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Energy & Fuels
George Koutsourakis, Carys Worsley, Michael Spence, James C. Blakesley, Trystan M. Watson, Matt Carnie, Fernando A. Castro
Summary: Metastability in perovskite solar cell (PSC) devices was investigated through current-voltage (I-V) testing and voltage dependent photoluminescence (PL-V) imaging. Advanced I-V parameter acquisition methods are needed for accurate PSC performance evaluation, as misleading results can occur when using simple fast I-V curves. The study also distinguishes between metastability and degradation, an important step for reporting stabilized efficiencies of PSC devices. The research highlights the need to revisit existing quantitative PL imaging methods and assumptions in PSC devices.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Chemistry, Physical
Huachao Zai, Jie Su, Cheng Zhu, Yihua Chen, Yue Ma, Pengxiang Zhang, Sai Ma, Xiao Zhang, Haipeng Xie, Rundong Fan, Zijian Huang, Nengxu Li, Yu Zhang, Yujing Li, Yang Bai, Ziyan Gao, Xueyun Wang, Jiawang Hong, Kangwen Sun, Jingjing Chang, Huanping Zhou, Qi Chen
Summary: The research utilized sandwiched electrode buffer technology to enhance the efficiency and stability of perovskite solar cells, leading to improved performance of PSCs in practical applications.
Article
Energy & Fuels
Yun Jia, Youyang Wang, Xiaobo Hu, Jinjia Xu, Guoen Weng, Xianjia Luo, Shaoqiang Chen, Ziqiang Zhu, Hidefumi Akiyama
Summary: In this study, three types of breakdown phenomena in monocrystalline Si solar cells were observed using the reverse-biased electroluminescence imaging technique. Various methods were applied to diagnose each breakdown mechanism, including combining EL and ReBEL imaging, introducing distributed circuit modeling, analyzing temperature coefficient, Si energy band structure, Baraff theory, and identifying the Zener effect as a possible cause of early breakdown.
