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Facile Fabrication of SnO2 Nanorod Arrays Films as Electron Transporting Layer for Perovskite Solar Cells
Solar RRL ( IF 6.0 ) Pub Date : 2018-07-06 , DOI: 10.1002/solr.201800133
Yinhua Lv 1, 2, 3 , Peng Wang 3 , Bing Cai 3 , Qingshan Ma 3 , Xiaojia Zheng 3 , Yihui Wu 3 , Qike Jiang 1 , Jingyue Jimmy Liu 1, 4 , Wen-Hua Zhang 3
Affiliation  

As the vital competent in high performance perovskite solar cells (PSCs), the inorganic metal oxide electron transporting materials (ETMs) with tailored architectures are responsible for extracting and transporting photogenerated electrons and preventing the recombination effectively. Here, a facile hydrothermal method is demonstrated for the growth of highly crystalline and uniform 1D SnO2 nanorod arrays (SR) with excellent optical property, which are further successfully exploited as ETMs in PSCs. Both length and diameter of 1D SR are tuned carefully by optimizing the hydrothermal process. Power conversion efficiency (PCE) as high as 16.7% can be obtained for PSCs based on these SR. Furthermore, a graded heterojunction (GHJ) configuration was built by intercalating a TiO2 thin interlayer to improve the band alignment between perovskite and SR, which pushes the PCE to 18.7% with better ambient stability. This work demonstrates that the SR can act as a promising candidate for ETM in PSCs, and provides a workable stategy to improve the performance of PSCs.

中文翻译:

SnO2纳米棒阵列膜作为钙钛矿型太阳能电池电子传输层的简便制备

作为高性能钙钛矿太阳能电池(PSC)的重要能力,具有定制结构的无机金属氧化物电子传输材料(ETM)负责提取和传输光生电子并有效防止重组。在这里,展示了一种简便的水热方法,用于生长具有优异光学性能的高度结晶且均匀的一维SnO 2纳米棒阵列(SR),并进一步成功地将其用作PSC中的ETM。一维SR的长度和直径都通过优化水热过程进行了仔细调整。基于这些SR的PSC可获得高达16.7%的功率转换效率(PCE)。此外,通过插入TiO 2建立了梯度异质结(GHJ)构型薄的中间层可改善钙钛矿和SR之间的能带排列,从而将PCE推至18.7%,并具有更好的环境稳定性。这项工作表明,SR可以充当PSC中ETM的有前途的候选者,并且为提高PSC的性能提供了可行的策略。
更新日期:2018-07-06
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