Band Dispersion and Hole Effective Mass of Methylammonium Lead Iodide Perovskite (Solar RRL 10∕2018)

In article no. 1800132 , Jin‐Peng Yang, Nobuo Ueno, Satoshi Kera, and co‐workers perform observations of the top valence band structure of CH 3 NH 3 PbI 3 single crystals using angle‐resolved ultraviolet photoelectron spectroscopy of the cleaved single‐crystal surfaces. The combination of freshly cleaved crystal surfaces and determination of the exact orientation of the crystal axes using diffraction techniques successfully measures well‐determined crystal directions.