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자연과학대학
화학·나노과학전공
Journal papers
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Perovskite–Gold Nanorod Hybrid Photodetector with High Responsivity and Low Driving Voltage
Title
Perovskite–Gold Nanorod Hybrid Photodetector with High Responsivity and Low Driving Voltage
Authors
Wang H.
;
Lim J.W.
;
Quan L.N.
;
Chung K.
;
Jang Y.J.
;
Ma Y.
;
Kim D.H.
Ewha Authors
김동하
SCOPUS Author ID
김동하
Issue Date
2018
Journal Title
Advanced Optical Materials
ISSN
2195-1071
Citation
Advanced Optical Materials vol. 6, no. 13
Keywords
high responsivity
;
low driving voltage
;
perovskite–gold nanorod hybrid
;
vertically structured photoconductive photodetectors
Publisher
Wiley-VCH Verlag
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
The optical and electronic properties of noble metallic nanoparticles can be exploited to enhance the performance of inorganic/organic photodetectors. In this work, a uniformly distributed layer of Au nanorods (AuNRs) is integrated into vertically structured perovskite photoconductive photodetectors and, as a result, perovskite–AuNR hybrid photodetectors that exhibit significant photocurrent enhancements are reported. Ultimately it achieves a responsivity of ≈320 A W−1 at a low driving voltage of −1 V. This is an improvement of 60% compared to the responsivity of pristine devices (≈200 A W−1). The high responsivity and low driving voltage place this device among the highest performing perovskite-based thin-film photoconductive photodetectors reported. The stability and linearity of the photoresponse following repeated light/dark cycles are characterized. The hybrid device also shows a fast response (with the decay time of ≈95 ns) compared to pristine devices (≈230 ns). The improvements in photodetection performance are attributed to plasmon-enhanced optical absorption, as well as advances in charge extraction and transport. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI
10.1002/adom.201701397
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