期刊
SMALL
卷 15, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201804150
关键词
flexible photodetectors; moisture-stability; nanowires; pseudohalide perovskites
类别
资金
- Canada Research Chair program
- UNESCO Chairs of Materials and Technologies for Energy Conversion, Saving and Storage (MATECSS)
- Fonds de recherche du Quebec-Nature et technologies (FRQNT)
Hybrid organic-inorganic perovskites have shown exceptional semiconducting properties and microstructural versatility for inexpensive, solution-processable photovoltaic and optoelectronic devices. In this work, an all-solution-based technique in ambient environment for highly sensitive and high-speed flexible photodetectors using high crystal quality perovskite nanowires grown on Kapton substrate is presented. At 10 V, the optimized photodetector exhibits a responsivity as high as 0.62 A W-1, a maximum specific detectivity of 7.3 x 10(12) cm Hz(1/2) W-1, and a rise time of 227.2 mu s. It also shows remarkable photocurrent stability even beyond 5000 bending cycles. Moreover, a deposition of poly(methyl methacrylate) (PMMA) as a protective layer on the perovskite yields significantly better stability under ambient air operation: the PMMA-protected devices are stable for over 30 days. This work demonstrates a cost-effective fabrication technique for high-performance flexible photodetectors and opens opportunities for research advancements in broadband and large-scale flexible perovskite-based optoelectronic devices.
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