The influence of the I/Cl ratio on the performance of CH3NH3PbI3-xClx-based solar cells: why is CH3NH3I : PbCl2=3: 1 the "magic" ratio?
The influence of the I/Cl ratio on the performance of CH3NH3PbI3-xClx-based solar cells: why is CH3NH3I : PbCl2=3: 1 the "magic" ratio?
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I/Cl 比对 CH3NH3PbI3·xClx 太阳能电池性能的影响：为什么 CH3NH3I : PbCl2 = 3 : 1 是“神奇”比？
DOI：
10.1039/c5nr06217a
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发表时间：
2016-01-01
期刊：
影响因子：
6.7
通讯作者：
Liu, Lijia
中科院分区：
文献类型：
--
作者：
McLeod, John A.;Wu, Zhongwei;Liu, Lijia
甲基铵三卤化铅（CH 3 NH3 PbI 3-xClx）钙钛矿通常由两种前体CH 3 NH3 I和PbCl 2以3：1的比例合成。结果发现，在前体混合物中的I/Cl比率的轻微调整对太阳能电池性能起着强烈的作用。在这项研究中，钙钛矿与不同的I/Cl比进行了比较研究。结合X射线衍射（XRD）和X射线吸收精细结构（XAFS）在铅L-3-边缘测量，我们表明，该器件的性能可以直接相关的Pb的配位环境的变化。
Methylammonium lead trihalide (CH3NH3PbI3-xClx) perovskites are usually synthesized from two precursors, CH3NH3I and PbCl2 at a ratio of 3 : 1. It was found that a slight adjustment of the I/Cl ratio in the precursor mixture plays a strong effect on solar cell performance. In this study, perovskites made with different I/Cl ratios were comparatively studied. In combination with X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS) measured at the Pb L-3-edge, we demonstrate that the device performance can be directly correlated to the change in the coordination environment of Pb.