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Perovskite heterojunction based on CH3NH3PbBr3 single crystal for high-sensitive self-powered photodetector

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Tian_2016_APL_Heterojunction_FinalPublishedVersion.pdf (1.247Mb)
Date
06/12/2016
Author
Cao, Min
Tian, Jiyu
Cai, Zhi
Peng, Lan
Yang, Lei
Wei, Dacheng
Keywords
Perovskite
Photodetector
Heterojunction
single crystal
QC Physics
NDAS
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Abstract
Perovskite single crystals exhibit extraordinary optoelectronic performances due to their advantages such as low trap-state densities, long carrier diffusion, and large absorption coefficient, and thus, photodetectors based on perovskite single crystals have attracted much research interest. Unlike the reported one-component single-crystal perovskite photodetectors, here, we have developed a facile two-step approach to fabricate a core-shell heterojunction based on the CH3NH3PbBr3 single crystal. A photodetector made of the as-prepared perovskite heterojunction renders the feature of self-power attributed to a built-in electric field in the junction and exhibits a wavelength-dependent responsivity with a peak responsivity up to 11.5 mA W−1 under 450 nm irradiation at zero bias, which is one order of magnitude higher than the CH3NH3PbBr3 single crystal and shows a maximum external quantum efficiency of 3.17%, also higher than the reported 0.2% of the CH3NH3PbBr3 single crystal. Our work may lead to more efficient self-powered heterojunction systems based on perovskite single crystals.
Citation
Cao , M , Tian , J , Cai , Z , Peng , L , Yang , L & Wei , D 2016 , ' Perovskite heterojunction based on CH 3 NH 3 PbBr 3 single crystal for high-sensitive self-powered photodetector ' , Applied Physics Letters , vol. 109 , no. 23 , 233303 . https://doi.org/10.1063/1.4971772
Publication
Applied Physics Letters
Status
Peer reviewed
DOI
https://doi.org/10.1063/1.4971772
ISSN
0003-6951
Type
Journal article
Rights
Copyright 2016 The Authors, publishing rights managed by AIP Publishing LLC. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1063/1.4971772
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/12275

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