High-performance ultraviolet photodetector based on organic-inorganic hybrid structure

Dali Shao, Mingpeng Yu, Hongtao Sun, Guoqing Xin, Jie Lian, Shayla Sawyer

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

An ultraviolet (UV) photodetector is fabricated by sandwiching a nanocomposite active layer between charge-selective semiconducting polymers. The nanocomposite active layer composed of TiO2 nanoparticles (NPs) blended with 1,3-bis(N-carbazolyl)benzene (mCP), which acts as a "valve" controller that enables hole injection into the device upon UV illumination. The UV photodetector demonstrated a high photocurrent to dark current ratio (∼104), a large linear dynamic range of 60 dB, and a remarkable external quantum efficiency (∼8.5 × 104%) for the UV light at 351 nm. In addition to discussing the performance of the UV photodetector, a general strategy for design and fabrication of high-performance UV photodetectors with hole injection operation mode is suggested.

Original languageEnglish (US)
Pages (from-to)14690-14694
Number of pages5
JournalACS Applied Materials and Interfaces
Volume6
Issue number16
DOIs
StatePublished - Aug 27 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Keywords

  • hole injection
  • organic-inorganic
  • photoresponsivity
  • polymer
  • ultraviolet photodetector

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