journal article·2017-04-26

Crystalline Engineering Toward Large-Scale High-Efficiency Printable Cu(In,Ga)Se2 Thin Film Solar Cells on Flexible Substrate by Femtosecond Laser Annealing Process

Shih-Chen Chen, Nian-Zu She, Kaung-Hsiung Wu, Yu-Ze Chen, Wei-Sheng Lin, Jia-Xing Li, Fang-I Lai, Jenh-Yih Juang, Chih Wei Luo, Lung-Teng Cheng, Tung-Po Hsieh, Hao-Chung Kuo, Yu-Lun Chueh

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Abstract

Ink-printing method emerges as a viable way for manufacturing large-scale flexible Cu(In,Ga)Se 2 (CIGS) thin film photovoltaic (TFPV) devices owing to its potential for the rapid process, mass production, and low-cost nonvacuum device fabrication. Here, we brought the femtosecond laser annealing (fs-LA) process into the ink-printing CIGS thin film preparation. The effects of fs-LA treatment on the structural and optoelectronic properties of the ink-printing CIGS thin films were systematically investigated. It was observed that, while the film surface morphology remained essentially unchanged under superheating, the quality of crystallinity was significantly enhanced after the fs-LA treatment. Moreover, a better stoichiometric composition was achieved with an optimized laser scanning rate of the laser beam, presumably due to the much reduced indium segregation phenomena, which is believed to be beneficial in decreasing the defect states of In Se, V Se, and In Cu . Consequently, the shunt leakage current and recombination centers were both greatly decreased, resulting in a near 20% enhancement in photovoltaic conversion efficiency.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC

Compound Semiconductor Solar Cell Department, Next Generation Solar Cell Division, Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan, ROC

Department of Photonics Engineering, Yuan-Ze University, Taoyuan 32003, Taiwan, ROC

School of Material Science and Engineering, State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou City 730050, Gansu Province, P. R. China

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China

Department of Physics, National Sun Yat-Sen University, Kaohsiung, 80424, Taiwan, ROC

Funding

National Tsing Hua University · Ministry of Science and Technology, Taiwan · Department of Industrial Technology, Ministry of Economic Affairs, Taiwan

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