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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
김동하scopus
Issue Date
2018
Journal Title
Advanced Optical Materials
ISSN
2195-1071JCR Link
Citation
Advanced Optical Materials vol. 6, no. 13
Keywords
high responsivitylow driving voltageperovskite–gold nanorod hybridvertically structured photoconductive photodetectors
Publisher
Wiley-VCH Verlag
Indexed
SCIE; SCOPUS WOS 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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자연과학대학 > 화학·나노과학전공 > Journal papers
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