The presence of hot carriers is presented in the operational properties of an (FA,Cs)Pb(I, Br, Cl)3 solar cell at ambient temperatures and under practical solar concentration. Albeit, in a device architecture that is not suitably designed as a functional hot carrier solar cell. At 100 K, clear evidence of hot carriers is observed in both the high energy tail of the photoluminescence spectra and from the appearance of a nonequilibrium photocurrent at higher fluence in light J–V measurements. At room temperature, however, the presence of hot carriers in the emission at elevated laser fluence is shown to compete with a gradual red shift in the PL peak energy as photoinduced halide segregation begins to occur at higher lattice temperature. The effects of thermionic emission of hot carriers and the presence of a nonequilibrium carrier distribution are also shown to be distinct from simple lattice heating. This results in large unsaturated photocurrents at high powers as the Fermi distribution exceeds that of the heterointerface controlling carrier transport and rectification.

中文翻译：

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金属卤化物钙钛矿太阳能电池中热载流子提取的证据

热载流子的存在体现在 (FA,Cs)Pb(I, Br, Cl) 的操作特性中3太阳能电池在环境温度和实际太阳聚光下。尽管如此，在不适合设计为功能性热载流子太阳能电池的器件架构中。在 100 K 时，在光致发光光谱的高能尾部以及较高光通量下出现的非平衡光电流中均观察到热载流子的明显证据J-V测量。然而，在室温下，随着光致卤化物偏析在较高的晶格温度下开始发生，在升高的激光注量下发射中存在的热载流子会与 PL 峰值能量的逐渐红移竞争。热载流子的热电子发射效应和非平衡载流子分布的存在也被证明与简单的晶格加热不同。当费米分布超过控制载流子传输和整流的异质界面时，这会导致高功率下产生大的不饱和光电流。