Journal
APPLIED PHYSICS LETTERS
Volume 109, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4963269
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Funding
- Ministry of Science and Technology [2016YFA0200700]
- National Natural Science Foundation of China [91233104, 61376063, 51473184, 11504408]
- Collaborative Innovation Center of Suzhou Nano Science and Technology (CICSNST)
- CICSNST
- Jiangsu Provincial Natural Science Foundation [BK20130006]
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Organic-inorganic perovskites are promising light absorbing active materials for photodetectors; however, the performance of current organic-inorganic perovskite-based photodetectors are limited by the high dark current due to hole injection at the cathode interlayer typically composed of fullerene derivatives. We have developed a mixture interlayer by simply blending polymethyl methacrylate ( PMMA) with [6,6]-phenyl-C61-butyric acidmethyl ester (PCBM). Scanning Kelvin probe microscopy imaging reveals that the presence of PMMA reduced the work function of the PCBM: PMMA interlayer, which leads to increased energy barrier for hole injection and better hole-blocking property. Optimized perovskite photodetector with PCBM: PMMA hole-blocking interlayer exhibits a high detectivity of 1.1 x 10(13) Jones, a broad linear dynamic range of 112 dB, and a fast response time of 2.2 mu s. Published by AIP Publishing.
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