NDLI: Spray pyrolysis coating Al bilayer for PERC

Content Provider	IEEE Xplore Digital Library
Author	Hsing-Hua Wu Kuei-Bo Chen Huang, W.K.W. Nai-Tien Ou Chung-Han Wu Sheng-min Yu Wan-Ying Chou Sung-Yen Wei Tai-Jui Wang Wen-Ching Sun
Copyright Year	2014
Description	Author affiliation: Mater. & Chem. Res. Labs., Ind. Technol. Res. Inst., Hsinchu, Taiwan (Sheng-min Yu; Wan-Ying Chou; Sung-Yen Wei; Tai-Jui Wang; Wen-Ching Sun) \|\| Gintech Energy Corp., Miaoli, Taiwan (Hsing-Hua Wu; Kuei-Bo Chen; Huang, W.K.W.; Nai-Tien Ou; Chung-Han Wu)
Abstract	In this study we use low-cost spray pyrolysis method to produce a $Al_{2}O_{3}:Cl/TiO_{2}$ bilayer as rear passivation layer to replace the common known $Al_{2}O_{3}/SiNx$ laminate in PERC structure silicon solar cells. The $TiO_{2}$ and $TiO_{2}/Al_{2}O_{3}$ mixed thin film acts a competent barrier from molten aluminum paste during the co-firing process and high refractive index of those thin films demonstrated excellent internal back reflectance (IBR). Very high negative fixed charge concentration is up to 5 × $10^{12}$ $cm^{-2}$ in $TiO_{2}$ thin film being observed and the interface trap density $(D_{it})$ can be controlled via Ti/Al ratio and ultra-thin $Al_{2}O_{3}:Cl$ interfacial layer to maintain good passivation ability and the lowest result of $D_{it}$ is 8 × $10^{10}$ $cm^{-2}eV^{-1}$ with a 6nm $Al_{2}O_{3}:Cl$ interfacial layer. Through the use of $Al_{2}O_{3}:Cl$ interfacial layer, the carrier lifetime of bulk wafer increase from 60μs to 120μs. All of the results show that this concept is very promising for high efficiency silicon solar cell application.
Starting Page	1265
Ending Page	1267
File Size	912148
Page Count	3
File Format	PDF
e-ISBN	9781479943982
DOI	10.1109/PVSC.2014.6925145
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Films Passivation Silicon Aluminum Photovoltaic cells Capacitance-voltage characteristics PERC spray pyrolysis passivation
Content Type	Text
Resource Type	Article

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