Type II GaSb quantum ring solar cells under concentrated sunlight

Che Pin Tsai, Shun Chieh Hsu, Shih Yen Lin, Ching Wen Chang, Li Wei Tu, Kun Cheng Chen, Tsong Sheng Lay, Chien-Chung Lin

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


A type II GaSb quantum ring solar cell is fabricated and measured under the concentrated sunlight. The external quantum efficiency confirms the extended absorption from the quantum rings at long wavelength coinciding with the photoluminescence results. The shortcircuit current of the quantum ring devices is 5.1% to 9.9% more than the GaAs reference's under various concentrations. While the quantum ring solar cell does not exceed its GaAs counterpart in efficiency under one-sun, the recovery of the open-circuit voltages at higher concentration helps to reverse the situation. A slightly higher efficiency (10.31% vs. 10.29%) is reported for the quantum ring device against the GaAs one.

Original languageEnglish
Pages (from-to)A359-A364
Number of pages5
JournalOptics Express
Issue number5
StatePublished - 10 Mar 2014

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