Consejo Superior de Investigaciones Científicas (CSIC), Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla , C/Américo Vespucio 49, 41092 Sevilla, Spain.
Institute of Photoelectronic Thin Film Devices and Technology, Nankai University , No. 94 Weijin Road, 300071 Tianjin, P. R. China.
ACS Appl Mater Interfaces. 2017 Oct 18;9(41):35505-35510. doi: 10.1021/acsami.7b08431. Epub 2017 Oct 9.
Herein, we demonstrate a synthetic approach producing highly crystalline methylammonium lead bromide perovskite (MAPbBr) microcubes at room temperature by injecting a perovskite precursor solution into an environmentally friendly antisolvent (isopropyl alcohol). Confirmed by X-ray and electron diffraction, as well as electron microscopy, these MAPbBr microcubes are single crystals and have perfect cubic structure, with sizes varying between 1 and 15 μm depending on the synthesis conditions. The stoichiometry of the MAPbBr crystal is proven by energy-dispersive X-ray analysis. Finally, optical analysis carried out by means of laser scanning confocal microscopy evidences how the crystalline quality of the microcubes translates into a homogeneous photoluminescence throughout the cube volume.
在此，我们展示了一种在室温下通过将钙钛矿前驱体溶液注入环境友好的抗溶剂（异丙醇）中合成高结晶性甲脒铅溴钙钛矿（MAPbBr）微立方的方法。通过 X 射线和电子衍射以及电子显微镜证实，这些 MAPbBr 微立方是单晶，具有完美的立方结构，根据合成条件，尺寸在 1 到 15 微米之间变化。通过能量色散 X 射线分析证明了 MAPbBr 晶体的化学计量比。最后，通过激光扫描共聚焦显微镜进行的光学分析证明了微立方的晶体质量如何转化为整个立方体积的均匀光致发光。
