纳米棒
钙钛矿(结构)
氧化锡
结晶度
材料科学
二氧化锡
X射线光电子能谱
能量转换效率
化学工程
四方晶系
金红石
纳米技术
光电子学
兴奋剂
化学
结晶学
晶体结构
复合材料
工程类
冶金
作者
Xiaokun Zhang,Yichuan Rui,Yuanqiang Wang,Jingli Xu,Hongzhi Wang,Qinghong Zhang,Peter Müller‐Buschbaum
标识
DOI:10.1016/j.jpowsour.2018.09.072
摘要
Tin dioxide (SnO2) is regarded as an effective electron transport material for attaining high-performance perovskite solar cells (PSCs). Herein, vertically aligned SnO2 nanorod arrays are grown directly on fluorine-doped tin oxide (FTO) substrates in an acidic solution via hydrothermal method, where the area density of the nanorod arrays is tailored by varying the precursor concentration. Particularly, the mean diameters of the nanorods increase from 15 to 25 nm and the corresponding area densities decrease from 660 to 460 μm−2 with increasing the concentration of tin(IV) chloride pentahydrate. X-ray diffraction and X-ray photoelectron spectroscopy measurements reveal that the nanorod arrays are pure tetragonal rutile SnO2 with a high degree of crystallinity. Mixed perovskites of (FAPbI3)0.85(MAPbBr3)0.15 are infiltrated into these SnO2 nanorod arrays, and the perovskite solar cells show an enhanced photovoltaic performance as compared to the nanoparticle counterpart. Perovskite solar cells based on SnO2 nanorod arrays with the optimized area density exhibit the best power conversion efficiency of 15.46% which is attributed to an accelerated electron transport and a decreased recombination rate at SnO2/perovskite interface.
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