Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 10, Issue 10, Pages 2400-2407Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b00960
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Funding
- Science and Technology Commission of Shanghai Municipality [18520744600, 18520710800, 17520742400]
- National Postdoctoral Science Foundation of China [2017M621355]
- National Natural Science Foundation of China (NSFC) [51872050, 11674061, 11811530065]
- Open Project of the State Key Laboratory of Luminescence and Applications [SKLA-2018-05]
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Millimeter-sized CsPbBr3 single crystals were prepared via a facile solvent-evaporation method in ambient environment. The heterojunction between p-type CuI and n-type CsPbBr3 was formed by a simple immersion process. The as-integrated CsPbBr3/CuI device exhibits a good rectifying behavior (ratio of 250 at +/- 2 V). In particular, the photodetector shows excellent self-powered characteristics under 540 nm light illumination, including high photocurrent (near 100 nA); high photosensitivity (on/off ratio of 1.5 x 10(3)); fast response speed (0.04/2.96 ms); and good wavelength selectivity (565-525 nm), responsivity (1.4 mA W-1), and detectivity (6.2 x 10(10) Jones). This work provides a simple, low-cost, and effective method for preparing millimeter-level CsPbBr3 single crystals. The simple device architecture further provides a promising approach for fabricating high-performance self-powered photodetectors.
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