Abstract

Nanostructured Group IV oxides (ZrO₂ and HfO₂) have been synthesized and their structural, optical, and energy parameters have been studied. The obtained nanopowders have been used to fabricate nanostructured thin-film photoelectrodes for perovskite solar cells (PSCs). FTO/cTiO₂/HfO₂/CH₃NH₃PbI₃/Spiro-MeOTAD/Au cell architecture has been developed. Photovoltaic characteristics and photoconversion efficiency for PSCs based on mesoscopic hafnium and zirconium oxides have been compared to the analogous characteristics for known titania-based PSCs. It has been demonstrated that the differences in the photovoltaic characteristics of PSCs are due to the morphology of the mesoporous HfO₂ and ZrO₂ layers, as well as to the specific features of charge transfer and accumulation at the perovskite/photoelectrode interface. The results obtained indicate good prospects for the application of nanostructured Group IV oxide materials with E_g > 5 eV as photoelectrodes for PSCs. Charge hopping mechanism in very wide bandgap photoelectrodes and its advantages for the development of high-efficiency PSCs is discussed.

中文翻译：

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用于钙钛矿太阳能电池的IV组氧化物

摘要

合成了纳米IV族氧化物（ZrO ₂和HfO ₂），并研究了它们的结构，光学和能量参数。所获得的纳米粉已用于制造钙钛矿太阳能电池（PSC）的纳米结构薄膜光电极。FTO / c TiO ₂ / HfO ₂ / CH ₃ NH ₃ PbI ₃/ Spiro-MeOTAD / Au单元体系结构已开发。已将基于介观ha和锆氧化物的PSC的光伏特性和光转换效率与已知的基于二氧化钛的PSC的类似特性进行了比较。已经证明，PSC的光伏特性的差异是由于中孔HfO ₂和ZrO ₂层的形态，以及由于钙钛矿/光电电极界面上电荷转移和积累的特定特征所致。获得的结果表明，E _g为纳米结构的Ⅳ族氧化物材料的应用前景良好。> 5 eV作为PSC的光电电极。讨论了带隙非常宽的光电电极中的电荷跳跃机制及其对开发高效PSC的优势。