期刊
NANO LETTERS
卷 22, 期 20, 页码 8241-8249出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c02978
关键词
self-powered UV photodetector; 2D perovskite single-crystal arrays; ferro-pyro-phototronic effect; piezo-phototronic effect
类别
资金
- National Natural Science Foundation of China
- Natural Science Foundation of Hebei Province
- Hebei Education Department
- Advanced Talents Incubation Program of the Hebei University
- Science and Technology Plan Project of Hebei Province
- [62005072]
- [62104057]
- [51972094]
- [52125205]
- [U20A20166]
- [61805015]
- [61804011]
- [E2020201025]
- [E2021201016]
- [B2021201034]
- [BJK2022050]
- [521000981287]
- [521000981351]
- [521000981248]
- [226Z1002G]
In this study, patterned 2D ferroelectric perovskite microbelt arrays were fabricated, leading to optimized performance of flexible photodetectors. These perovskite arrays exhibited excellent self-powered photodetection performance under 320 nm illumination, and the introduction of piezo-phototronic effect greatly enhanced their performance.
Metal halide perovskite ferroelectrics possess various physical characteristics such as piezoelectric and pyro-electric effects, which could broaden the application of perovskite ferroelectrics and enhance the optoelectronic performance. There-fore, it is promising to combine multiple effects to optimize the performance of the self-powered PDs. Herein, patterned 2D ferroelectric perovskite (PMA)2PbCl4 microbelt arrays were demonstrated through a PDMS template-assisted antisolvent crystallization method. The perovskite arrays based flexible photodetectors exhibited fine self-powered photodetection per-formance under 320 nm illumination and much enhanced reproducibility compared with the randomly distributed single-crystal microbelts-based PDs. Furthermore, by introducing the piezo-phototronic effect, the performance of the flexible PD was greatly enhanced. Under an external tensile strain of 0.71%, the responsivity was enhanced by 185% from 84 to 155.5 mA/W. Our findings offer the advancement of comprehensively utilizing various physical characteristics of the ferroelectrics for novel ferroelectric optoelectronics.
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