Three-dimensional self-branching anatase TiO2 nanorods with the improved carrier collection for SrTiO3-based perovskite solar cells
Three-dimensional self-branching anatase TiO2 nanorods with the improved carrier collection for SrTiO3-based perovskite solar cells
复制标题
三维自支化锐钛矿型 TiO2 纳米棒，改进了 SrTiO3 基钙钛矿太阳能电池的载流子收集
DOI：
10.1016/j.jallcom.2016.04.049
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发表时间：
2016-09-15
影响因子：
6.2
通讯作者：
Yang, Weiguang
中科院分区：
文献类型：
--
作者：
Hu, Yajing;Wang, Chen;Yang, Weiguang
基于三元氧化物SrTiO 3的有机-无机钙钛矿太阳能电池显示出较高的Voc，归因于其略高的导带边和更好的吸收材料形貌。然而，其较低效率的载流子收集和吸收剂材料与电子传输层（ETL）之间有限的总界面面积，显著降低了Jsc。通过调节Ti（OBu）（4）的浓度，我们成功地制备了三维（3D）自支化TiO 2纳米棒/SrTiO 3纳米复合材料，并对SrTiO 3的粒径进行了微调。随着三维（3D）自支化SrTiO 2纳米棒的掺入，基于SrTiO 3的器件的Jsc被高度提升。我们获得的性能最好的太阳能电池表现出9.99%的PCE和19.48mA/cm（2）的Jsc。这主要归功于SrTiO 3的载流子收集能力、CH 3 NH3 PbI 3的表面覆盖性和结晶性以及三维自支化TiO 2纳米棒增强的光散射能力。(C)2016爱思唯尔B. V.保留所有权利。
The organic-inorganic perovskite solar cells based on ternary oxide SrTiO3 shows a higher Voc, attributed to its slightly higher conduction band edge and better morphology of absorber material. However, its less efficient carrier collection and limited overall interfacial areas between the absorber material and the electron-transport layer (ETL), dramatically reducing the Jsc. Here, By adjusting the concentrations of the Ti(OBu)(4), we successfully prepared the three-dimensional (3D) self-branching anatase TiO2 nanorod/SrTiO3 nanocomposites, and slightly tuned the particle size of SrTiO3. With the incorporation of the three-dimensional (3D) self-branching anatase TiO2 nanorod, the Jsc of the device based on SrTiO3 was highly boosted. The best performing solar cell we obtained exhibited a PCE of 9.99% with a Jsc of 19.48 mA/cm(2). The excellent performance could be ascribed to the improvement of charge carrier collection of SrTiO3, better surface coverage and crystallinity of CH3NH3PbI3, and enhanced light scattering ability caused by 3D self-branching anatase TiO2 nanorods. (C) 2016 Elsevier B.V. All rights reserved.