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標題: Fabrication and Characterization of GaAs Solar Cells on Copper Substrates
作者: Tseng, M.C.
Horng, R.H.
Tsai, Y.L.
Wuu, D.S.
Yu, H.H.
關鍵字: Copper;GaAs solar cell;thin film;epitaxial lift-off
Project: Ieee Electron Device Letters
期刊/報告no:: Ieee Electron Device Letters, Volume 30, Issue 9, Page(s) 940-942.
This letter presents performance comparison between a GaAs/mirror/copper thin-film solar cell and a conventional GaAs solar cell with a thick GaAs substrate. The GaAs thin-film solar cell was fabricated by transferring a GaAs solar cell onto a AuGe/Au mirror-coated copper substrate. With the aid of the excellent copper conductor, the thin-film solar cell exhibits significant improvement in both open-circuit voltage and short circuit current density. The improved current-voltage (I-V) performance of the thin-film solar cell originates from the following two factors: reduced reverse saturation current by good heat dissipation of copper and enhanced light absorption by the highly reflective AuGe/Au mirror. The role of the mirror can further be verified in the measurement of external quantum efficiency (EQE) response where the thin-film solar cell exhibits a larger EQE response in the wavelength range of 700-900 nm than the conventional GaAs solar cell with the same active absorbing thickness.
ISSN: 0741-3106
DOI: 10.1109/led.2009.2026292
Appears in Collections:材料科學與工程學系

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