Efficiency improvement of InGaP/GaAs/Ge solar cells by hydrothermal-deposited ZnO nanotube structure

Chen Chen Chung, Binh Tinh Tran, Kung Liang Lin, Yen Teng Ho, Hung Wei Yu, Nguyen Hong Quan, Edward Yi Chang

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

In this paper, a zinc oxide (ZnO) nanotube, fabricated by the hydrothermal growth method on triple-junction (T-J) solar cell devices to enhance efficiency, is investigated. Compared to those of bare T-J solar cells (without antireflection (AR) coating) and solar cells with Si3N4 AR coatings, the experimental results show that the T-J solar cells, which use a ZnO nanotube as an AR coating, have the lowest reflectance in the short wavelength spectrum. The ZnO nanotube has the lowest light reflection among all experimental samples, especially in the range of 350 to 500 nm from ultraviolet (UV) to visible light. It was found that a ZnO nanotube can enhance the conversion efficiency by 4.9%, compared with a conventional T-J solar cell. The Si3N4 AR coatings also enhance the conversion efficiency by 3.2%.The results show that a cell with ZnO nanotube coating could greatly improve solar cell performances.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalNanoscale Research Letters
Volume9
Issue number1
DOIs
StatePublished - 1 Jan 2014

Keywords

  • Hydrothermal
  • Triple-junction
  • ZnO nanotube

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