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采用溶液法合成甲胺溴铅(CH_3NH_3Pb Br_3)多晶原料,用溶液蒸发法生长了尺寸约为7 mm′7 mm′3 mm的CH_3NH_3PbBr_3晶体。测量了晶体的XRD谱,采用X射线外推法研究了晶体结构。结果表明:生长的CH_3NH_3Pb Br_3单晶为立方晶系结构,晶格参数a=0.592 76(7)nm。将微型溶液晶体生长装置与荧光共聚焦显微镜相结合,实时观测了不同生长条件下CH_3NH_3PbBr_3晶体的微观形貌和不同晶面的生长速率。得到(011)、(101)和(001)晶面的平均水平生长速率分别为0.017 57(6)、0.021 44(4)和0.018 65(7)nm/s;发达晶面簇为{110}和{100}。
Polymerization of methylamine bromine (CH_3NH_3Pb Br_3) polycrystalline material by solution method was used to grow CH_3NH_3PbBr_3 crystal with the size of about 7 mm ’7 mm’ 3 mm by solution evaporation method. The XRD spectra of the crystals were measured and the crystal structure was studied by X-ray extrapolation. The results show that the growth of CH_3NH_3Pb Br_3 single crystal cubic structure, lattice parameter a = 0.592 76 (7) nm. The micro-crystal growth device and fluorescence confocal microscope were combined to observe the micro-morphology and growth rate of CH_3NH_3PbBr_3 crystal under different growth conditions in real time. The average horizontal growth rates of (011), (101) and (001) planes were 0.017 57 (6), 0.021 44 (4) and 0.018 65 (7) nm / And {100}.