Results 171 to 180 of about 1,364 (192)

Promoting effect of lanthanum doping on photovoltaic performance of CZTSSe solar cells

The Journal of Chemical Physics
A large open-circuit voltage (VOC) deficit is the major challenge hindering the efficiency improvement of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. Cation substitution, or doping, is usually an effective strategy to achieve carrier regulation and improve efficiency.
Zhengjun Luo, Lei Yu, Tingting Zheng, Xiaofei Dong, Fengxia Yang, Jiangtao Chen, Xuqiang Zhang, Yun Zhao, Yan Li   +8 more
openaire   +2 more sources

The Multiple Roles of Na Ions in Highly Efficient CZTSSe Solar Cells

Small
Abstract Sodium (Na) doping is a well‐established technique employed in chalcopyrite and kesterite solar cells. While various improvements can be achieved in crystalline quality, electrical properties, or defect passivation of the absorber materials by incorporating Na, a comprehensive demonstration of the desired
Wentong Yang, Yixiong Ji, Wangxian Chen, Yining Pan, Zifei Chen, Shaoyang Wu, Salvy P. Russo, Yang Xu, Trevor A. Smith, Anthony Chesman, Paul Mulvaney, Fangyang Liu   +11 more
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Suppressing Element Inhomogeneity Enables 14.9% Efficiency CZTSSe Solar Cells

Advanced Materials
AbstractKesterites, Cu2ZnSn(SxSe1−x)4 (CZTSSe), solar cells suffer from severe open‐circuit voltage (VOC) loss due to the numerous secondary phases and defects. The prevailing notion attributes this issue to Sn‐loss during the selenization. However, this work unveils that, instead of Sn‐loss, elemental inhomogeneity caused by Cu‐directional diffusion ...
Yimeng Li, Changcheng Cui, Hao Wei, Zhipeng Shao, Zucheng Wu, Shu Zhang, Xiao Wang, Shuping Pang, Guanglei Cui   +8 more
openaire   +2 more sources

A band-gap-graded CZTSSe solar cell with 12.3% efficiency

Journal of Materials Chemistry A, 2016
Using an appropriate SeS2/Se weight ratio, band gap grading was realized. By increasing the value ofVOCthrough band gap grading in the depletion region, a recordVOCdeficit of 0.576 V and an efficiency of 12.3% were obtained.
Kee-Jeong Yang, Dae-Ho Son, Shi-Joon Sung, Jun-Hyoung Sim, Young-Ill Kim, Si-Nae Park, Dong-Hwan Jeon, JungSik Kim, Dae-Kue Hwang, Chan-Wook Jeon, Dahyun Nam, Hyeonsik Cheong, Jin-Kyu Kang, Dae-Hwan Kim   +13 more
openaire   +2 more sources

Performance enhancement of flexible CZTSSe solar cells on optimized roughness substrate

Optical Engineering, 2018
Flexible Cu2ZnSn(S,Se)4 (CZTSSe) thin film solar cells are fabricated on titanium substrate by magnetron sputtering with a composition gradient precursor followed by selenization. By varying polishing time with diluted HNO3 and HF from 0 to 90 s, an atomic force microscope shows that the substrate with the minimal surface roughness of 8.6 nm is ...
Huirong Shang, Adil Raza, Hulin Huang, Honglie Shen, Luanhong Sun   +4 more
openaire   +1 more source

Impact of Minor Phases on the Performances of CZTSSe Thin-Film Solar Cells

Chemistry of Materials, 2016
Cu2ZnSn(S1–xSex)4 (CZTSSe) alloys are promising candidates for low-cost and high-efficiency thin-film solar cells. Compared to CdTe and Cu(InxGa1–x)Se2, CZTSSe uses chemicals found more abundantly on earth. This key aspect as well as its optical properties—band gap range of 1.0–1.5 eV and absorption coefficient larger than 104 cm–1—makes CZTSSe a ...
Giovanni Altamura, Julien Vidal
openaire   +1 more source

Exploring the promoting effect of lanthanum passivation on the photovoltaic performance of CZTSSe solar cells

The Journal of Chemical Physics
The significant open-circuit voltage (VOC) deficit poses a major obstacle to enhancing the efficiency of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. Interface passivation emerges as a potent strategy to regulate carrier transport and boost performance. Here, we innovatively introduced rare-earth lanthanum (La) to passivate the absorber interface by directly ...
Yun Zhao, Fengxia Yang, Zhengjun Luo, Yongkang Wu, Xiaofei Dong, Jiangtao Chen, Xuqiang Zhang, Yan Li   +7 more
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Improve the Performances of Cztsse Solar Cells by Using Natfsi Additive

SSRN Electronic Journal, 2022
Haoyu Xu, Xuanyang Guo, Hui Yang, Qing Zhou, Shiyan Liu, Haifeng Gao, Chao Gao, Wei Yu   +7 more
openaire   +1 more source

Window layer engineering of kesterite CZTSSe thin-film solar cells

Journal of Materials Chemistry A
We successfully fabricated i-ZnO-free CZTSSe-based TFSCs with efficiencies exceeding 10% by employing a simplified window structure at a low substrate temperature.
Dong Hyun Kang, Jun Sung Jang, Dhanaji B. Malavekar, Youseong Park, Hojun Choi, Youngrog Kim, Eunjin Jo, Seung Wook Shin, Jin Hyeok Kim   +8 more
openaire   +1 more source

CZTSSe solar cell with an efficiency of 10.19% based on absorbers with homogeneous composition and structure using a novel two-step annealing process

Solar Energy, 2020
Guoan Ren, Daming Zhuang, Yaowei Wei
exaly