热扩散率
钙钛矿(结构)
卤化物
热导率
材料科学
热导率测量
电导率
分析化学(期刊)
矿物学
化学
无机化学
热力学
结晶学
复合材料
物理化学
物理
色谱法
作者
Zhelu Hu,Lionel Aigouy,Zhuoying Chen,Danièle Fournier
摘要
We report on the measurement of thermal conductivity and thermal diffusivity by a modulated thermoreflectance microscopy technique on a mixed-cation perovskite material [Cs0.05(formamidinium0.83methylammonium0.17)0.95Pb(I0.83Br0.17)3] widely applied for solution-processed perovskite solar cells. Such materials are supposed to present improved thermal stability compared to methylammonium-based single cation perovskites. Our measurements are performed on perovskite/TiO2/SnO2:F/SiO2 structures, with perovskite thicknesses ranging between 250 nm and 1000 nm. This configuration is the one of a real solar cell, with the same substrate and intermediate layers as of an operating device. We measured a thermal conductivity kper of 0.26 ± 0.03 W m−1 K−1 and a thermal diffusivity Dper of 3.5 × 10−7 ± 0.5 m2 s−1. The value for thermal conductivity is comparable to the one measured on single cation perovskites, which is generally in the 0.2–0.6 range. The value for thermal diffusivity has not been reported previously.
科研通智能强力驱动
Strongly Powered by AbleSci AI