Organic inorganic metal halide perovskites (OIHPs) has emerged as promising photovoltaic materials the latest years. Many OIHPs, however, have complex material compositions with mixed cation and halide compositions, phase mixtures, as well as beneficial remains of PbI₂ in the final solar cell materials where the complex material composition with dual conduction and valence band states and its effects on the performance remain unclear. Here, we report an approach to analyze the phase mixture, order-disorder phases and the emissive electronic states via a 4-state model of the photoluminescence yield. The approach is applied to scaffold layer perovskite materials with different mixed halide composition. The optical transitions and the full emission spectra are de-convoluted to quantify the band gaps and charge quenching yields in the OIHPs. An approach to extract the excited state coupling parameters within the 4-state model is also briefly given. The integration model is finally utilized in charge quenching yield analysis for the different materials and correlated with solar cell performance from MAPbI₃ and MAPbI_3−xCl_x in mesoporous TiO₂ layers where inclusion of Cl improves crystal formation and is compared to alternative approaches using optimized solvents and anti-solvent methods. A band gap grading effect was found to be present for the scaffold MAPbI₃ and increased for MAPbI_3−xCl_x, beneficial for decreased hole concentration at the back contact and thus reducing back contact recombination.

近年来，有机无机金属卤化物钙钛矿（OIHPs）成为有前途的光伏材料。但是，许多OIHP具有复杂的材料组成，其中包含混合的阳离子和卤化物组成，相混合物，以及最终太阳能电池材料中PbI _2的有益残留物，其中复杂的材料组成具有双导带和价带态，并且其对光导带和价带态具有影响。性能仍不清楚。在这里，我们报告的方法来分析相混合物，有序-无序阶段和发射电子态通过光致发光产率的四态模型。该方法适用于具有不同混合卤化物组成的支架层钙钛矿材料。对光学跃迁和整个发射光谱进行反卷积，以量化OIHP中的带隙和电荷猝灭产率。还简要介绍了一种提取4态模型内的激发态耦合参数的方法。集成模型最终用于不同材料的电荷猝灭产率分析，并与中孔TiO _2中MAPbI ₃和MAPbI _3-x Cl _x的太阳能电池性能相关夹杂有Cl的金属层可改善晶体形成，并与使用优化溶剂和反溶剂方法的替代方法进行比较。发现对于支架MAPbI ₃存在带隙分级效应，并且对于MAPbI _3-x Cl _x具有带隙分级效应，这有利于降低背接触处的空穴浓度并因此减少背接触的重组。