Improved conversion efficiency of GaN-based solar cells with Mn-doped absorption layer

Jinn-Kong Sheu, Feng Wen Huang, Chia Hui Lee, Ming Lun Lee, Yu Hsiang Yeh, Po Cheng Chen, Wei-Chi Lai

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14 Citations (Scopus)

Abstract

GaN-based solar cells with Mn-doped absorption layer grown by metal-organic vapor-phase epitaxy were investigated. The transmittance spectrum and the spectral response showed the presence of an Mn-related band absorption property. Power-dependent, dual-light excitation, and lock-in amplifier techniques were performed to confirm if the two-photon absorption process occurred in the solar cells with Mn-doped GaN absorption layer. Although a slight decrease in an open circuit voltage was observed, a prominent increase in the short circuit current density resulted in a significant enhancement of the overall conversion efficiency. Under one-sun air mass 1.5 G standard testing condition, the conversion efficiency of Mn-doped solar cells can be enhanced by a magnitude of 5 times compared with the cells without Mn-doped absorption layer.

Original languageEnglish
Article number063906
JournalApplied Physics Letters
Volume103
Issue number6
DOIs
Publication statusPublished - 2013 Aug 5

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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