Ultrahigh quantum efficiency of CuO nanoparticle decorated In 2Ge2O7 nanobelt deep-ultraviolet photodetectors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Wei Tian
  • Tianyou Zhai
  • Xi Wang
  • Meiyong Liao
  • Songlin Li
  • Shimou Chen
  • Dmitri Golberg
  • Yoshio Bando

Detail(s)

Original languageEnglish
Pages (from-to)6318-6324
Journal / PublicationNanoscale
Volume4
Issue number20
Publication statusPublished - 21 Oct 2012
Externally publishedYes

Abstract

Although there has been significant progress in the fabrication and performance optimization of 1-D nanostructure-based deep-ultraviolet photodetectors, it is still a challenge to develop an effective device with high performance characteristics, such as high photocurrent-dark current ratio and high quantum efficiency. Herein, an efficient and simple method to fabricate high performance CuO nanoparticle decorated In2Ge2O 7 nanobelt deep-ultraviolet photodetectors is presented. A CuO coated In2Ge2O7 nanobelt based photodetector showed very high responsivity (7.34 × 105 A W-1) and high quantum efficiency (3.5 × 106). The underlying mechanism is proposed to be the formation of p-n heterojunctions between decorated nanoparticles and nanobelts, which enhances the spatial separation of photogenerated electrons and holes. This study opens up a new horizon for creation of novel photodetectors with high quantum efficiency. © 2012 The Royal Society of Chemistry.

Citation Format(s)

Ultrahigh quantum efficiency of CuO nanoparticle decorated In 2Ge2O7 nanobelt deep-ultraviolet photodetectors. / Tian, Wei; Zhi, Chunyi; Zhai, Tianyou; Wang, Xi; Liao, Meiyong; Li, Songlin; Chen, Shimou; Golberg, Dmitri; Bando, Yoshio.

In: Nanoscale, Vol. 4, No. 20, 21.10.2012, p. 6318-6324.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review