Structure of Methylammonium Lead Iodide Within Mesoporous Titanium Dioxide: Active Material in High-Performance Perovskite Solar Cells

作者：Joshua J. Choi, Xiaohao Yang, Zachariah M. Norman, Simon J. L. Billinge, Jonathan S. Owen · 发表于：Nano Letters · 年份：2013 · DOI：10.1021/nl403514x · 被引用次数：298 · 研究领域：Perovskite Materials and Applications、Quantum Dots Synthesis And Properties、Advanced Photocatalysis Techniques

We report the structure of methylammonium lead(II) iodide perovskite in mesoporous TiO2, as used in high-performance solar cells. Pair distribution function analysis of X-ray scattering reveals a two component nanostructure: one component with medium range crystalline order (30 atom %) and another with only local structural coherence (70 atom %). The nanostructuring correlates with a blueshift of the absorption onset and increases the photoluminescence. Our findings underscore the importance of fully characterizing and controlling the structure for improved solar cell efficiency.