Broadband light-absorption InGaN photoanode assisted by imprint patterning and ZnO nanowire growth for energy conversion

Junjie Kang, Vinh Quang Dang, Hongjian Li, Sungjin Moon, Panpan Li, Yangdoo Kim, Chaehyun Kim, Jinyoung Choi, Hakjong Choi, Zhiqiang Liu, Heon Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this research, an InGaN-based photoanode with a broadband light-absorption range from ultraviolet to green, patterned by imprint lithography and branched by ZnO nanowires, has been applied to water splitting. Over the solar spectrum range, the absorbance increases due to the scattering effect of the micro-structure compared to that of flat surface InGaN, which reaches a maximum of over 90% at 380 nm as ZnO nanowires are further employed in this novel photoanode. Consequently, the induced photocurrent density of the InGaN photoanode with a domelike structure and ZnO nanowires on the surface shows a remarkable enhancement of seven times that of the one with a flat surface. Further investigation indicates the wet-etching process for defect removal has an essential impact on photocurrent efficiency. This design demonstrates an innovative approach for water splitting.

Original languageEnglish
Article number045401
JournalNanotechnology
Volume28
Issue number4
DOIs
Publication statusPublished - 2017 Jan 27

Keywords

  • InGaN
  • nanowires
  • photoanode
  • ZnO

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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