Ultrasensitive broadband phototransistors based on perovskite/organic-semiconductor vertical heterojunctions

Chao Xie, Peng You, Zhike Liu, Li Li, Feng Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

164 Citations (Scopus)

Abstract

Organolead halide perovskites have emerged as the most promising materials for various optoelectronic devices, especially solar cells, because of their excellent optoelectronic properties. Here, we present the first report of low-voltage high-gain phototransistors based on perovskite/organic-semiconductor vertical heterojunctions, which show ultrahigh responsivities of ~109 AW–1 and specific detectivities of ~ 1014 Jones in a broadband region from the ultraviolet to the near infrared. The high sensitivity of the devices is attributed to a pronounced photogating effect that is mainly due to the long carrier lifetimes and strong light absorption in the perovskite material. In addition, flexible perovskite photodetectors have been successfully prepared via a solution process and show high sensitivity as well as excellent flexibility and bending durability. The high performance and facile solution-based fabrication of the perovskite/organic-semiconductor phototransistors indicate their promise for potential application for ultrasensitive broadband photodetection.

Original languageEnglish
Article numbere17023
JournalLight: Science and Applications
Volume6
Issue number8
DOIs
Publication statusPublished - Aug 2017

Keywords

  • Broadband
  • Flexible
  • Organic semiconductor
  • Perovskite
  • Photodetector

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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