Stability of (C6H5C2H4NH3)2Pb(BrxI4-x) mixed crystals

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Natl Defense Acad, Kanagawa, Japan [1 ]
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Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes & Review Papers | 1997年 / 36卷 / 11期
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摘要：
The stability of (C6H5C2H4NH3)2Pb(BrxI4-x) mixed crystals was investigated and the degradation process was discussed. A thin film of microcrystalline (RNH3)2PbBr4 was more stable than that of (RNH3)2PbI4, and the stability of (C6H5C2H4NH3)2Pb(BrxI4-x) mixed crystals was improved by the replacement of I with Br. X-ray diffraction and optical absorption measurements suggested that the (RNH3)2PbI4 crystal changed to β-phenethylamine (C6H5C2H4NH2) coordinated PbI2 with the elapse of time. In order to determine the origin of degradation, a light irradiation-induced degradation effect was also studied. The photochemical reaction was one of the possible reasons for degradation.
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页码：6876 / 6879
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