Pt/AlGaN Nanoarchitecture : Toward High Responsivity, Self-Powered Ultraviolet-Sensitive Photodetection

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

6 Scopus Citations
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Author(s)

  • Danhao Wang
  • Xin Liu
  • Shi Fang
  • Chen Huang
  • Yang Kang
  • Huabin Yu
  • Zhongling Liu
  • Haochen Zhang
  • Ran Long
  • Yujie Xiong
  • Yangjian Lin
  • Yang Yue
  • Binghui Ge
  • Tien Khee Ng
  • Boon S. Ooi
  • Zetian Mi
  • Haiding Sun

Detail(s)

Original languageEnglish
Pages (from-to)120–129
Journal / PublicationNano Letters
Volume21
Issue number1
Online published15 Dec 2020
Publication statusPublished - 13 Jan 2021

Abstract

Energy-saving photodetectors are the key components in future photonic systems. Particularly, self-powered photoelectrochemical-type photodetectors (PEC-PDs), which depart completely from the classical solid-state junction device, have lately intrigued intensive interest to meet next-generation power-independent and environment-sensitive photodetection. Herein, we construct, for the first time, solar-blind PEC PDs based on self-assembled AlGaN nanostructures on silicon. Importantly, with the proper surface platinum (Pt) decoration, a significant boost of photon responsivity by more than an order of magnitude was achieved in the newly built Pt/AlGaN nanoarchitectures, demonstrating strikingly high responsivity of 45 mA/W and record fast response/recovery time of 47/20 ms without external power source. Such high solar-blind photodetection originates from the unparalleled material quality, fast interfacial kinetics, as well as high carrier separation efficiency which suggests that embracement of defect-free wide-bandgap semiconductor nanostructures with appropriate surface decoration offers an unprecedented opportunity for designing future energy-efficient and large-scale optoelectronic systems on a silicon platform.

Research Area(s)

  • AlGaN nanostructures, photoelectrochemical photodetectors, self-power, solar-blind

Citation Format(s)

Pt/AlGaN Nanoarchitecture : Toward High Responsivity, Self-Powered Ultraviolet-Sensitive Photodetection. / Wang, Danhao; Liu, Xin; Fang, Shi; Huang, Chen; Kang, Yang; Yu, Huabin; Liu, Zhongling; Zhang, Haochen; Long, Ran; Xiong, Yujie; Lin, Yangjian; Yue, Yang; Ge, Binghui; Ng, Tien Khee; Ooi, Boon S.; Mi, Zetian; He, Jr-Hau; Sun, Haiding.

In: Nano Letters, Vol. 21, No. 1, 13.01.2021, p. 120–129.

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