Enhancing the Efficiency of GaSb Photovoltaic Cell Using Thin-Film Multiscale Haze and Radiative Cooling

Prince Gupta, Yeonhong Kim, Jonghyeok Im, Gumin Kang, Augustine M. Urbas, Kyoungsik Kim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


In this work, a multiscale thin-film membrane of self-aggregated anodized aluminum oxide (AAO) nanowire structure was developed to enhance the efficiency of GaSb photovoltaic (PV) cell using both optical haze and passive radiative-cooling effects in a broad region of the solar spectrum. We controlled, (1) the optical properties of thin-film AAO and (2) the plasmonic-induced perfect absorption/emission by changing packing densities and lengths of AAO nanowires during the anodization and wet etching processes. The AAO nanowire structures provide 98% absorption/emission in the environmental emission/transmission window (8-13 μm), resulting in efficient passive self-cooling and higher-order optical haze transmission up to approximately 98%; privileged characteristics enhance the suppressed PV efficiency due to the unwanted reflection of incident light and excessive heating effects caused by low- and high-energy photons unused by the band gap of the cell. By integrating this thin-film nanowire structure membrane with the front surface of the GaSb cell, we achieved an overall increase in efficiency of 18% in contrast with a bare cell.

Original languageEnglish
Pages (from-to)9304-9314
Number of pages11
JournalACS Applied Energy Materials
Issue number9
Publication statusPublished - 2021 Sept 27

Bibliographical note

Funding Information:
The author acknowledges research project support from Yonsei University of 2020-22-0077 and 2019-22-0097.

Publisher Copyright:
© 2021 American Chemical Society. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Electrical and Electronic Engineering
  • Materials Chemistry


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