Comparing Titania‐Based Architectures for Perovskite Solar Cells: A Combined Optical–Electronic Loss Analysis,Small Methods

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Comparing Titania‐Based Architectures for Perovskite Solar Cells: A Combined Optical–Electronic Loss Analysis
Small Methods ( IF 10.7 ) Pub Date : 2017-11-29 , DOI: 10.1002/smtd.201700275
Anton Kovalsky ₁ , Christopher McCleese ₁ , Wei-Chun Lin ₁ , Seth Goldberg ₁ , Charles Kolodziej ₁ , Clemens Burda ₁

Affiliation

Combined optical and electronic loss analysis is applied in comparing MAPbI₃ and MAPbI₃₋_xCl_x as light absorbers in both planar and mesoporous TiO₂ absorber scaffolds in order to determine the specific effects of these architectural variations on energy‐dependent loss mechanisms in perovskite‐sensitized solar cells. A transfer matrix model is used to separate electronic losses from optical losses in the form of parasitic absorption. It is reported that MAPbI₃₋_xCl_x is the superior absorber due to increased crystallinity, but that the benefit from using the chloride‐assisted formulation is negated when the absorber is deposited on a mesoporous substrate. It is also reported that some beneficial electronic and optical effects are associated with the mesoporous TiO₂: decreased parasitic absorption at short wavelengths and possible enhancement of charge transfer; the overall use of the mesoporous scaffold typically seen in dye‐sensitized solar cells is not appropriate for perovskite‐sensitized solar cells, where it disrupts the formation of large perovskite grains. The analysis also provides important insight into the application of transfer matrix modeling in pseudoplanar systems such as the ubiquitous mesoporous solar cell architecture.

中文翻译：

钙钛矿太阳能电池的基于二氧化钛的体系结构比较：组合的光电子损耗分析

结合光学和电子损失分析，比较了平面和中孔TiO ₂吸收剂支架中作为光吸收剂的MAPbI ₃和MAPbI _3-_x Cl _x，以确定这些体系结构变化对钙钛矿中能量依赖性损耗机理的特定影响。敏化太阳能电池。转移矩阵模型用于以寄生吸收的形式将电子损耗与光学损耗分开。据报道，MAPbI ₃₋_x Cl _x由于结晶度的提高，它是优异的吸收剂，但是当吸收剂沉积在中孔基材上时，使用氯化物辅助配方的好处就消失了。还据报道，一些有益的电子和光学效应与中孔TiO _2有关：短波长下的寄生吸收降低，电荷转移可能增强；染料敏化太阳能电池中通常使用的介孔支架整体不适用于钙钛矿敏化太阳能电池，因为它会破坏大钙钛矿晶粒的形成。该分析还为转移矩阵建模在伪平面系统（例如无处不在的中孔太阳能电池架构）中的应用提供了重要的见识。

更新日期：2017-11-29

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