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Group IV Oxides for Perovskite Solar Cells
Doklady Physical Chemistry ( IF 1.1 ) Pub Date : 2021-04-10 , DOI: 10.1134/s0012501621020020
M. F. Vildanova , A. B. Nikolskaia , S. S. Kozlov , O. I. Shevaleevskiy , O. V. Almjasheva , V. V. Gusarov

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 Eg > 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:

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。

更新日期:2021-04-11
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