On-Nanowire Axial Heterojunction Design for High-Performance Photodetectors

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, Johnny C. Ho, Kin Man Yu

研究成果: Contribution to journalArticle査読

63 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)8474-8481
ページ数8
ジャーナルACS nano
10
9
DOI
出版ステータス出版済み - 9 27 2016
外部発表はい

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 工学(全般)
  • 物理学および天文学(全般)

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