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Optimizing Optoelectronic Performances by Controlling Halide Compositions for MAPb(ClxI1-x)3 Single Crystals

Abstract

This article aims at investigating the structures of iodide/chloride mixed-halide perovskites and correlating the I: Cl ratio with their optoelectronic performances. A series of 8 MAPb(ClxI1-x)3 (x=0, 0.01, 0.04, 0.05, 0.06, 0.20, 0.99, 1) single crystals were successfully grown. The crystals with different doping concentrations showed different optical-absorption and PL emission. The band gaps were successfully tuned from 1.46 to 2.92 eV. The photodetectors were designed using 8 crystals, among which the MAPb(Cl0.2I0.8)3 single crystal exhibits superior photocurrent to dark current ratio (Ilight/Idark ratio of 1547 when the incident light is ~1609μW/cm2, 546nm). This detailed investigation on Cl/I mixed halide lead methylammonium perovskites is important for optimizing device performances through composition tuning.

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Publication details

The article was received on 10 Apr 2019, accepted on 01 Jun 2019 and first published on 12 Jun 2019


Article type: Paper
DOI: 10.1039/C9CE00538B
CrystEngComm, 2019, Accepted Manuscript

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    Optimizing Optoelectronic Performances by Controlling Halide Compositions for MAPb(ClxI1-x)3 Single Crystals

    Z. Xu, H. Li, Z. Zhao, Q. Fu, H. Tao, S. Wang, Z. Ma, J. Ding, Y. Ma and Y. Han, CrystEngComm, 2019, Accepted Manuscript , DOI: 10.1039/C9CE00538B

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