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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
정대성Kim, Yun-HiLee, Jong-Soo
DGIST Authors
정대성Lee, Jong-Soo
Issue Date
2014-01
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 MNEDL(Multifunctional Nanomaterials & Energy Devices Lab)
  • Research Interests Design of new type of multifunctional nanoparticles for energy-related devices; 다기능성 나노재료; 무기물 태양전지; 열전소자
Files:
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Collection:
Department of Energy Science and EngineeringEco Energy Device Lab1. Journal Articles
Department of Energy Science and EngineeringMNEDL(Multifunctional Nanomaterials & Energy Devices Lab)1. Journal Articles


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