Duan Hsin-Sheng, Zhou Huanping, Chen Qi, Sun Pengyu, Luo Song, Song Tze-Bin, Bob Brion, Yang Yang
Department of Materials Science and Engineering and California NanoSystems Institute, University of California Los Angeles, Los Angeles, California 90095, USA.
Phys Chem Chem Phys. 2015 Jan 7;17(1):112-6. doi: 10.1039/c4cp04479g.
Thin film photovoltaic cells based on hybrid halide perovskite absorbers have emerged as promising candidates for next generation photovoltaics. Here, we have characterized and identified the defect energy distribution in the CH3NH3PbI3 perovskite using admittance spectroscopy, which reveals a deep defect state ∼0.16 eV above the valence band. According to theoretical calculations, the defect state is possibly attributed to iodine interstitials (Ii), which can become the non-radiative recombination centers in the absorber.
基于混合卤化物钙钛矿吸收体的薄膜光伏电池已成为下一代光伏的有前途的候选者。在这里，我们使用导纳谱对CH3NH3PbI3钙钛矿中的缺陷能量分布进行了表征和识别，结果表明在价带上方约0.16 eV处存在一个深缺陷态。根据理论计算，该缺陷态可能归因于碘间隙原子（Ii），其可成为吸收体中的非辐射复合中心。
