Cations substitution tuning phase stability in hybrid perovskite single crystals by strain relaxation.
Cations substitution tuning phase stability in hybrid perovskite single crystals by strain relaxation.
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通过应变弛豫调节杂化钙钛矿单晶中的阳离子取代相稳定性
DOI:
10.1039/c7ra12521f
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发表时间:
2018-01-12
期刊:
影响因子:
3.9
通讯作者:
Li, P. G.
中科院分区:
文献类型:
--
作者:
Wu, C.;Chen, K.;Guo, D. Y.;Wang, S. L.;Li, P. G.
Methylammonium (MA) and formamidinium (FA) are two typical A site cations in lead halide perovskites. Instability of synthesised crystals will degrade the properties of the photoelectrical device constructed by such perovskites. MAPbI3 and FAPbI3 in cubic crystal structure have been demonstrated to be the most stable at room temperature. Herein we synthesised MA(EA)PbI3 and FA(MA)PbI3 single crystals using an inverse-temperature crystallization strategy by partially substituting the methylammonium (MA) with ethylammonium (EA) and the formamidinium (FA) with methylammonium (MA) respectively. The XRD results show that both crystal structures are cubic, which means organic incorporation can stabilize the crystal structure of lead halide perovskites. The lattice distortion decrease and strain relaxation in single crystals were considered to be the reason leading to higher stability. The single crystals of MA(EA)PbI3 and FA(MA)PbI3 with low trap state density exhibit excellent light-absorbing properties, indicating their potential applications in photoelectric devices.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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