期刊
FRONTIERS IN MATERIALS
卷 8, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fmats.2021.651957
关键词
perovskite; epitaxial growth; photodetector; solution-processed; single-crystal film
资金
- National Key Research and Development Program of China [2018YFE0125500, 2016YFB0401600]
- Program 111_2.0 in China [BP0719013]
- National Natural Science Foundation Project of China [61775034, 51879042, 61674029, 12005038]
- Research Fund for International Young Scientists [62050410350]
- International Cooperative Research Project of Jiangsu Province [BZ2018056]
- Leading Technology of Jiangsu Basic Research Plan [BK20192003]
Photodetectors based on epitaxial MAPbI(3) single-crystal film (SCF) show excellent stability with long-term stable response after 120 days, fast response time of 2.21 μs, high responsivity of 1.2 A W-1, and high detectivity of 3.07 x10(12) jones. The epitaxial MAPbI(3) SCFs exhibit low trap density and long carrier lifetime, making them comparable quality to MAPbI(3) PSCs and better quality than MAPbI(3) polycrystalline films.
Recent years, organic-inorganic hybrid perovskites (OIHPs) have been widely used in applications, such as solar cells, lasers, light-emission diodes, and photodetectors due to their outstanding optoelectronic properties. Nowadays photodetectors based on perovskite films (PFs) suffer from surface and interface traps, which result from low crystalline quality of perovskite films and lattice mismatch between perovskite films and substrates. Herein, we fabricate MAPbI(3) -(MA = CH3NH3) single-crystal films (SCFs) on MAPbBr(3) single crystal substrates in MAPbI(3) precursor solution during crystallization process via solution-processed epitaxy. Benefit from the good lattice matching, epitaxial MAPbI(3) SCFs with high crystallinity and smooth morphology are of comparable quality to MAPbI(3) PSCs and are of better quality than MAPbI(3) polycrystalline films. Here we report that epitaxial MAPbI(3) SCFs have a low trap density of 5.64x10(11) cm(-3) and a long carrier lifetime of 11.86 mu s. In this work, photodetector based on epitaxial MAPbI(3) single-crystal film (SCF) exhibits an excellent stability of a long-term stable response after 120 days, a fast response time of 2.21 mu s, a high responsivity of 1.2 A W-1 and a high detectivity of 3.07 x10(12) jones.
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