On-Nanowire Axial Heterojunction Design for High-Performance Photodetectors

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

81 Scopus Citations
View graph of relations

Author(s)

  • Pengfei Guo
  • Jinyou Xu
  • Ke Gong
  • Xia Shen
  • Yang Lu
  • Yang Qiu
  • Junqi Xu
  • Zhijun Zou
  • Chunlei Wang
  • Hailong Yan
  • Yongsong Luo
  • Anlian Pan
  • Han Zhang

Detail(s)

Original languageEnglish
Pages (from-to)8474-8481
Journal / PublicationACS Nano
Volume10
Issue number9
Publication statusPublished - 27 Sept 2016

Abstract

We report the growth of high-quality CdS/CdSxSe1-x axial heterostructure nanowires (NWHs) via a temperature-controlled chemical vapor deposition method. Microstructural characterizations revealed that these NWHs have a single-crystalline structure with abrupt heterojunctions. Local photoluminescence and mapping near the heterojunctions show only two separated narrow band-edge emission bands from the two different adjacent semiconductors, further demonstrating the high-quality of these heterostructures. Moreover, the photodetector based on the single NWH shows a performance (higher responsivity (1.18 × 102 A/W), faster response speed (rise ∼68 μs, decay ∼137 μs), higher Ion/Ioff ratio (105), higher EQE (3.1 × 104 %), and broader detection range (350-650 nm)) at room temperature superior to that of photodetectors based on single band gap nanostructures. This work suggests a much simpler route to achieve superior NWHs for applications in optoelectronic devices.

Research Area(s)

  • heterostructure, high performance, nanowire, photodetectors

Citation Format(s)

On-Nanowire Axial Heterojunction Design for High-Performance Photodetectors. / Guo, Pengfei; Xu, Jinyou; Gong, Ke et al.
In: ACS Nano, Vol. 10, No. 9, 27.09.2016, p. 8474-8481.

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