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Achieving high sensitivity in hybrid photodetectors based on an organic single crystal and an inorganic nanocrystal array
- Achieving high sensitivity in hybrid photodetectors based on an organic single crystal and an inorganic nanocrystal array
- Chung, DS[Chung, Dae Sung]; Kim, YH[Kim, Yun-Hi]; Lee, JS[Lee, Jong-Soo]
- DGIST Authors
- Lee, JS[Lee, Jong-Soo]
- Issue Date
- Nanotechnology, 25(3)
- Article Type
- Charge Separations; Electron Trapping; High-Sensitivity; Hole Mobility; Hybrid Photo Detectors; Inorganic Nanocrystals; Nanocrystal; Nanocrystals; Organic Semiconductor; Organic Single Crystals; Photoconductive Gains; Photodetector; Photodetectors; Photons; Semiconducting Organic Compounds; Single Crystal; Single Crystals; Specific Detectivity
- 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.
- Institute of Physics Publishing
- Related Researcher
Lee, Jong Soo
Multifuntional Nanomaterials & Energy Devices Lab(MNEDL)
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- Energy Science and EngineeringMNEDL(Multifunctional Nanomaterials & Energy Devices Lab)1. Journal Articles
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