A Ternary Solvent Method for Large-Sized Two-Dimensional Perovskites
A Ternary Solvent Method for Large-Sized Two-Dimensional Perovskites
复制标题
大尺寸二维钙钛矿的三元溶剂法
DOI：
10.1002/anie.201611794
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发表时间：
2017-02-20
影响因子：
16.6
通讯作者：
Zhai, Tianyou
中科院分区：
文献类型：
--
作者：
Chen, Junnian;Gan, Lin;Zhai, Tianyou
最近的报道表明，二维（2D）结构特征可以使钙钛矿具有显着的光电转换效率和高稳定性，但是构成具有较大尺寸的Ultrathin 2D Perovskites，其尺寸较大，仍然是一项挑战。本文报道的是2D（C4H9NH3）（2）PBBR4 Perovskites的受控生长通过氯苯 - 二甲基甲基乙烯硝基三位生三元溶剂方法。系统地研究了生长动力学上的关键因素，包括溶剂体积比，结晶温度和溶剂极性。在最佳反应条件下，将2D（C4H9NH3）（2）PBBR4钙钛矿（最大的侧向尺寸高达40m，最小厚度至几纳米）。此外，访问了各种碘掺杂2D（C4H9NH3）（2）Pbbrxi4-X perovskites，以合理地调整光学性能。
Recent reports demonstrate that a two-dimensional (2D) structural characteristic can endow perovskites with both remarkable photoelectric conversion efficiency and high stability, but the synthesis of ultrathin 2D perovskites with large sizes by facile solution methods is still a challenge. Reported herein is the controlled growth of 2D (C4H9NH3)(2)PbBr4 perovskites by a chlorobenzene-dimethylformide-acetonitrile ternary solvent method. The critical factors, including solvent volume ratio, crystallization temperature, and solvent polarity on the growth dynamics were systematically studied. Under optimum reaction condition, 2D (C4H9NH3)(2)PbBr4 perovskites, with the largest lateral dimension of up to 40m and smallest thickness down to a few nanometers, were fabricated. Furthermore, various iodine doped 2D (C4H9NH3)(2)PbBrxI4-x perovskites were accessed to tune the optical properties rationally.