Cited 1 time in webofscience Cited 3 time in scopus

A hybrid MoS2 nanosheet-CdSe nanocrystal phototransistor with a fast photoresponse

Title
A hybrid MoS2 nanosheet-CdSe nanocrystal phototransistor with a fast photoresponse
Authors
Ra, HS[Ra, Hyun-Soo]Kwak, DH[Kwak, Do-Hyun]Lee, JS[Lee, Jong-Soo]
DGIST Authors
Ra, HS[Ra, Hyun-Soo]; Kwak, DH[Kwak, Do-Hyun]; Lee, JS[Lee, Jong-Soo]
Issue Date
2016
Citation
Nanoscale, 8(39), 17223-17230
Type
Article
Article Type
Article
Keywords
CdSe NanocrystalsElectromagnetic Wave AttenuationEnergy-Band DiagramHeterojunctionsHybrid MaterialsHybrid NanostructuresHybrid Photo DetectorsInterfaces (Materials)Molybdenum CompoundsNanocrystal (NCs)NanocrystalsNanosheetsPhotodetectorsPhotonsPhotoresponsesPhototransistorsResidual CarrierWavelength Tunable
ISSN
2040-3364
Abstract
2-Dimensional (2D) and 0-dimensional (0D) hybrid nanostructures have been reported as promising new systems for highly-sensitive and wavelength-tunable photodetectors. Although the performance of hybrid photodetectors was enhanced by charge injection from 0D nanocrystals (NCs) to 2D nanosheets (NSs), the response time of hybrid photodetectors is still very slow due to the trapping and leakage of residual carriers at the interfaces of the hybrid materials. Here, we demonstrate a MoS2/CdSe hybrid phototransistor with enhanced responsivity of 2.5 × 105 A W-1 and detectivity of 1.24 × 1014 Jones. In addition, the device exhibited a fast rise (τrise) and decay time (τdecay) of 60 ms, respectively. The mechanism for the improved photoresponse time has been discussed using a charge injection model in an n-n type heterojunction energy band diagram of hybrid materials. © 2016 The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/2566
DOI
10.1039/c6nr05393a
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Lee, Jong Soo Multifuntional Nanomaterials & Energy Devices Lab(MNEDL)
  • Research Interests
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringMNEDL(Multifunctional Nanomaterials & Energy Devices Lab)1. Journal Articles


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