期刊
ACS ENERGY LETTERS
卷 3, 期 9, 页码 2068-2069出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.8b01106
关键词
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The relationship between the dipole moment of the methylammonium cation and the optoelectronic properties of lead halide perovskites remains under debate. We show that both the temperature-dependent charge carrier mobility and recombination kinetics are identical for methylammonium and cesium lead iodide, indicating that the role of the monovalent cation is subordinate to the lead iodide framework. From the observation that for both perovskites the electron-hole recombination is thermally activated, we speculate that the bandgap is slightly indirect.
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