Performance of GaAs/mirror/Cu-substrate thin-film solar cells

Ming Chun Tseng*, Ray-Hua Horng, Fan Lei Wu, Chih Hung Wu, Min De Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


This paper presents the thermal effect on the performance of a GaAs thin-film solar cell with a 50-200-μm-thick copper (Cu) substrate. The GaAs thin-film solar cell is fabricated by transferring a GaAs solar cell on a Cu substrate with a AuGe/Au mirror. The thin-film solar cells with sufficiently thick Cu substrates exhibit significant performance stability (e.g., V oc , J sc , and FF) as the temperature increases. This stability can be attributed to the following two factors: 1) The highly reflective AuGe/Au mirror enhances the light absorption of the thin-film cell with a thin base layer, and 2) the good thermal dissipation of the Cu substrate reduces thermal degradation.

Original languageEnglish
Article number6025276
Pages (from-to)3898-3904
Number of pages7
JournalIEEE Transactions on Electron Devices
Issue number11
StatePublished - 1 Nov 2011


  • Cu substrate
  • mirror
  • thermal dissipation
  • thin-film solar cell

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