Bifacial CIGS (11% efficiency)/Si solar cells by Cd-free and sodium-free green process integrated with CIGS TFTs

CuInGaSe 2 (CIGS) thin-film has successfully grown at low temperature 400°C for bifacial solar cells and TFTs without degrading the silicon solar cell on the other side. The efficiency of CIGS solar cells reached 6.3% and 11% at 400 and 500°C, respectively, by sodium-free and Cd-free (n-type ZnS buf...

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Main Authors: Yu-Jen Hsiao, Ting-Jen Hsueh, Jia-Min Shieh, Yu-Ming Yeh, Chien-Chih Wang, Bau-Tong Dai, Wen-Wei Hsu, Jing-Yi Lin, Chang-Hong Shen, Liu, C. W., Chenming Hu, Fu-Liang Yang
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Language:English
Subjects:
Etching
Photovoltaic cells
Photovoltaic systems
Silicon
Substrates
Thin film transistors
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creator Yu-Jen Hsiao
Ting-Jen Hsueh
Jia-Min Shieh
Yu-Ming Yeh
Chien-Chih Wang
Bau-Tong Dai
Wen-Wei Hsu
Jing-Yi Lin
Chang-Hong Shen
Liu, C. W.
Chenming Hu
Fu-Liang Yang
description CuInGaSe 2 (CIGS) thin-film has successfully grown at low temperature 400°C for bifacial solar cells and TFTs without degrading the silicon solar cell on the other side. The efficiency of CIGS solar cells reached 6.3% and 11% at 400 and 500°C, respectively, by sodium-free and Cd-free (n-type ZnS buffer layer used) green technologies. Texturing technique has been introduced here on Si not only to relieve the sodium-free impact on CIGS-crystallization but also to enhance the adhesion between CIGS solar cells and underneath substrate. CIGS TFTs are reported first time and revealed a record-high hole-mobility of 0.22 cm 2 /V-s. Hybrid CIGS solar cells/TFTs are uniformly formed on 6" wafers, simultaneously powered with silicon solar cells.
doi_str_mv 10.1109/IEDM.2011.6131686
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Etching
Photovoltaic cells
Photovoltaic systems
Silicon
Substrates
Thin film transistors
title Bifacial CIGS (11% efficiency)/Si solar cells by Cd-free and sodium-free green process integrated with CIGS TFTs
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