Improved Efficiency of a Large-Area Cu(In,Ga)Se2 Solar Cell by a Nontoxic Hydrogen-Assisted Solid Se Vapor Selenization Process

Autor:	Jyun Hong Huang, Jia-Min Shieh, Chih-Chung Lai, Hwen Fen Hong, Yu-Lun Chueh, Chang Hong Shen, Yu Ting Yen, Hou Ying Huang, Zhiming Wang, Fan Hu, Tsung-Ta Wu, Chia Ho Chang
Rok vydání:	2014
Předmět:	Materials science Hydrogen Open-circuit voltage chemistry.chemical_element Nanotechnology Electron Copper indium gallium selenide solar cells law.invention Chemical engineering chemistry law Scientific method Solar cell General Materials Science Homojunction Dark current
Zdroj:	ACS Applied Materials & Interfaces. 6:4842-4849
ISSN:	1944-8252 1944-8244
DOI:	10.1021/am405780z
Popis:	A nontoxic hydrogen-assisted solid Se vapor selenization process (HASVS) technique to achieve a large-area (40 × 30 cm2) Cu(In,Ga)Se2 (CIGS) solar panel with enhanced efficiencies from 7.1 to 10.8% (12.0% for active area) was demonstrated. The remarkable improvement of efficiency and fill factor comes from improved open circuit voltage (Voc) and reduced dark current due to (1) decreased interface recombination raised from the formation of a widened buried homojunction with n-type CdCu participation and (2) enhanced separation of electron and hole carriers resulting from the accumulation of Na atoms on the surface of the CIGS film. The effects of microstructural, compositional, and electrical characteristics with hydrogen-assisted Se vapor selenization, including interdiffusion of atoms and formation of buried homojunction, were examined in detail. This methodology can be also applied to CIS (CuInSe2) thin film solar cells with enhanced efficiencies from 5.3% to 8.5% (9.4% for active area) and provides a f...
Databáze:	OpenAIRE
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