TiO2 single crystalline nanorod compact layer for high-performance CH3NH3PbI3 perovskite solar cells with an efficiency exceeding 17% ocr
TiO2 single crystalline nanorod compact layer for high-performance CH3NH3PbI3 perovskite solar cells with an efficiency exceeding 17% ocr
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TiO2%20单晶%20结晶%20纳米棒%20紧凑%20层%20for%20高性能%20CH3NH3PbI3%20钙钛矿%20太阳能%20电池%20with%20an%20效率%20超越%2017%%20ocr
DOI：
10.1016/j.jpowsour.2016.09.134
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发表时间：
2016
影响因子：
9.2
通讯作者：
Lan Zhang
中科院分区：
文献类型：
--
作者：
He Xin;Wu Jihuai;Tu Yongguang;Xie Yiming;Dong Jia;Jia Jinbiao;Wei Yuelin;Lan Zhang
TiO2 致密层对于高性能钙钛矿太阳能电池 (PSC) 至关重要。有趣的是，使用一维纳米结构来制造致密层的研究严重缺乏。在本研究中，通过一锅溶剂热法合成了长度为 30 ± 10 nm、直径为 4 ± 1 nm 的锐钛矿型 TiO2 单晶纳米棒 (NR)。通过在透明导电氧化物基底上旋涂 TiO2 纳米棒，在 PSC 上制备出无针孔且厚度可控的致密层。由于良好的电子传输通道和较少的缺陷和界面，一维TiO2NRs比TiO2量子点（QDs）和TiO2纳米粒子（NPs）具有更长的电子寿命、更短的传输时间和更高的电荷收集效率，可以提高基于TiO2-NR致密层的PSC的光伏性能。结果，基于TiO2NRs的PSC表现出最好的光伏性能，功率转换效率为17.58%，与基于TiO2-QDs和TiO2-NPs的PSC分别提高了1.16和1.30倍。
A TiO2compact layer is crucial to a high-performance perovskite solar cell (PSC). Interestingly, there is a severe paucity of research on using one-dimensional nanostructure to fabricate the compact layer. In this study, anatase TiO2single-crystalline nanorods (NRs) with a length of 30 ± 10 nm and a diameter of 4 ± 1 nm are synthesized via a one-pot solvothermal approach. A pinhole-free and thickness-controllable compact layer on PSC is fabricated by spin-coating the TiO2nanorods on transparent conductive oxide substrate. Thanks to good electronic transport channel and less defects and interfaces, one-dimensional TiO2NRs, with longer electron lifetime, shorter transport time and higher charge collection efficiency than TiO2quantum dots (QDs) and TiO2nanoparticles (NPs), can improve the photovoltaic performance of the PSC based on TiO2-NR compact layer. As a result, the PSC based on TiO2NRs shows the best photovoltaic performance with a power conversion efficiency of 17.58%, which is enhanced by a factor of 1.16 and 1.30 respectively compared with the PSCs based on TiO2-QDs and TiO2-NPs.