The circle-grid electrode on concentrated GaAs solar cells efficiency

Chen Chen Chung*, Hung Wei Yu, Li Han Hsu, Chien I. Kuo, Nguyen Hong Quan, Yu Sheng Chiu, Edward Yi Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The relationship between front contact pattern of GaAs single-junction solar cell with conversion efficiency at different concentration ratios is studied in this paper. Five different front circle-grid patterns were designed and patterned on the in-house fabricated single junction GaAs solar cells. At high light concentration ratio, the cell efficiency is strongly dependent on the series resistance of the electrode. At the same time, the thermal effect should also be taken into consideration, especially when a device is operating under high concentration ratio. Therefore, the aim of this work is to find a suitable front contact pattern for a GaAs single-junction solar cell to increase the conversion efficiency under high concentration solar radiation. It is found that the device with proper pattern design geometrical shadowing factor of 7.1% has the best cell efficiency of 27.05% at CR>100x, AM1.5G.

Original languageEnglish
Title of host publicationPhotovoltaics for the 21st Century 6\
Number of pages7
StatePublished - 1 Dec 2011
EventPhotovoltaics for the 21st Century 6 - 218th ECS Meeting - Las Vegas, NV, United States
Duration: 10 Oct 201015 Oct 2010

Publication series

NameECS Transactions
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737


ConferencePhotovoltaics for the 21st Century 6 - 218th ECS Meeting
CountryUnited States
CityLas Vegas, NV

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    Chung, C. C., Yu, H. W., Hsu, L. H., Kuo, C. I., Quan, N. H., Chiu, Y. S., & Chang, E. Y. (2011). The circle-grid electrode on concentrated GaAs solar cells efficiency. In Photovoltaics for the 21st Century 6\ (17 ed., pp. 103-109). (ECS Transactions; Vol. 33, No. 17).