Enhancement of photoresponsive electrical characteristics of multilayer MoS2 transistors using rubrene patches

Eun Hei Cho, Won Geun Song, Cheol Joon Park, Jeongyong Kim, Sunkook Kim, Jinsoo Joo

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Multilayer MoS2 is a promising active material for sensing, energy harvesting, and optoelectronic devices owing to its intriguing tunable electronic band structure. However, its optoelectronic applications have been limited due to its indirect band gap nature. In this study, we fabricated a new type of phototransistor using multilayer MoS2 crystal hybridized with p-type organic semiconducting rubrene patches. Owing to the outstanding photophysical properties of rubrene, the device characteristics such as charge mobility and photoresponsivity were considerably enhanced to an extent depending on the thickness of the rubrene patches. The enhanced photoresponsive conductance was analyzed in terms of the charge transfer doping effect, validated by the results of the nanoscale laser confocal microscope photoluminescence (PL) and time-resolved PL measurements.

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Original languageEnglish
Pages (from-to)790-800
Number of pages11
JournalNano Research
Volume8
Issue number3
DOIs
Publication statusPublished - 2015

Keywords

  • charge transfer
  • MoS
  • photoresponsivity
  • rubrene
  • transistor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Materials Science(all)

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