CONDUCTING LAYERED ORGANIC-INORGANIC HALIDES CONTAINING (110)-ORIENTED PEROVSKITE SHEETS
CONDUCTING LAYERED ORGANIC-INORGANIC HALIDES CONTAINING (110)-ORIENTED PEROVSKITE SHEETS
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DOI：
10.1126/science.267.5203.1473
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发表时间：
1995-03-10
期刊：
影响因子：
56.9
通讯作者：
GULOY, AM
中科院分区：
文献类型：
--
作者：
MITZI, DB;WANG, S;GULOY, AM
采用水溶液生长技术合成了层状有机-无机钙钛矿结构的单晶[NH_2C(I)=NH_2](2)(CH_3NH_3)(M)SnM_(13)m+2。与最近发现的由[100]端基钙钛矿层组成的(C4H9NH3)(2)(CH3NH3)(n-1)SnNI3n+1系列不同，结构测定揭示了一个不寻常的结构类别，即由碘甲酰胺阳离子分隔的多组m[110]取向的CH3NH3SnI3钙钛矿片层。而m=2的化合物是半导体，禁带宽度为0.33+/-0.05电子伏特，增加m会导致更多的金属特性。通过选择有机阳离子来控制钙钛矿片层取向的能力展示了有机-无机钙钛矿提供的灵活性，并为定制和理解层状钙钛矿中的低维传输增加了重要的句柄。
Single crystals of the layered organic-inorganic perovskites, [NH2C(I)=NH2](2)(CH3NH3)(m) SnmI3m+2, were prepared by an aqueous solution growth technique. In contrast to the recently discovered family, (C4H9NH3)(2)(CH3NH3)(n-1)SnnI3n+1, which consists of [100]-terminated perovskite layers, structure determination reveals an unusual structural class with sets of m [110]-oriented CH3NH3SnI3 perovskite sheets separated by iodoformamidinium cations. Whereas the m = 2 compound is semiconducting with a band gap of 0.33 +/- 0.05 electron volt, increasing m leads to more metallic character. The ability to control perovskite sheet orientation through the choice of organic cation demonstrates the flexibility provided by organic-inorganic perovskites and adds an important handle for tailoring and understanding lower dimensional transport in layered perovskites.