Temperature dependence of pyro-phototronic effect on self-powered ZnO/perovskite heterostructured photodetectors

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• 作者：Wenbo Peng ; Ruomeng Yu ; Xingfu Wang ; Zhaona Wang ; Haiyang Zou ; Yongning He…
• 关键词：self ; powered ; ZnO ; perovskite ; pyro ; phototronic effect ; temperature dependence
• 刊名：Nano Research
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：9
• 期：12
• 页码：3695-3704
• 全文大小：2,025 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chinese Library of Science
  Chemistry
  Nanotechnology
  
• 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
• ISSN：1998-0000
• 卷排序：9

文摘

Self-powered ZnO/perovskite heterostructured ultraviolet (UV) photodetectors (PDs) based on the pyro-phototronic effect have been recently reported as a promising solution for energy-efficient, ultrafast-response, and high-performance UV PDs. In this study, the temperature dependence of the pyro-phototronic effect on the photo-sensing performance of self-powered ZnO/perovskite heterostructured PDs was investigated. The current responses of these PDs to UV light were enhanced by 174.1% at 77 K and 28.7% at 300 K owing to the improved pyro-phototronic effect at low temperatures. The fundamentals of the pyro-phototronic effect were thoroughly studied by analyzing the chargetransfer process and the time constant of the current response of the PDs upon UV illumination. This work presents in-depth understandings about the pyrophototronic effect on the ZnO/perovskite heterostructure and provides guidance for the design and development of corresponding optoelectronics for ultrafast photo sensing, optothermal detection, and biocompatible optoelectronic probes.