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Achieving high sensitivity in hybrid photodetectors based on an organic single crystal and an inorganic nanocrystal array

Title
Achieving high sensitivity in hybrid photodetectors based on an organic single crystal and an inorganic nanocrystal array
Authors
Chung, DS[Chung, Dae Sung]Kim, YH[Kim, Yun-Hi]Lee, JS[Lee, Jong-Soo]
DGIST Authors
Lee, JS[Lee, Jong-Soo]
Issue Date
2014-01-24
Citation
Nanotechnology, 25(3)
Type
Article
Article Type
Article
Keywords
Charge SeparationsElectron TrappingHigh-SensitivityHole MobilityHybrid Photo DetectorsInorganic NanocrystalsNanocrystalNanocrystalsOrganic SemiconductorOrganic Single CrystalsPhotoconductive GainsPhotodetectorPhotodetectorsPhotonsSemiconducting Organic CompoundsSingle CrystalSingle CrystalsSpecific Detectivity
ISSN
0957-4484
Abstract
We demonstrate an approach to enhance the photosensitivity of an organic single-crystal photodetector by combining it with a nanocrystal (NC) array. A systematic study of the dependence of the photodetector performance on illumination wavelength and light power together with the charge carrier mobility reveals that charge separation at the single-crystal/CdSe NC interface and subsequent electron trapping in the CdSe NCs generates effective photoconductive gain by hole circulation through the high-mobility single crystal. As a result, the responsivity and specific detectivity reached values up to 50 A W-1 and 2 × 109 cm Hz1/2 W-1, respectively. © 2014 IOP Publishing Ltd.
URI
http://hdl.handle.net/20.500.11750/2672
DOI
10.1088/0957-4484/25/3/035202
Publisher
Institute of Physics Publishing
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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