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首页> 外文期刊>ACS applied materials & interfaces >Novel Combination of Efficient Perovskite Solar Cells with Low Temperature Processed Compact TiO2 Layer via Anodic Oxidation
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Novel Combination of Efficient Perovskite Solar Cells with Low Temperature Processed Compact TiO2 Layer via Anodic Oxidation

机译:高效钙钛矿太阳能电池与阳极氧化法低温处理致密TiO2层的新型结合

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摘要

In this work, a facile and low temperature processed anodic oxidation approach is proposed for fabricating compact and homogeneous titanium dioxide film (AO-TiO2). In order to realize morphology and thickness control of AO-TiO2, the theory concerning anodic oxidation (AO) is unveiled and the influence of relevant parameters during the process of AO such as electrolyte ingredient and oxidation voltage on AO-TiO2 formation is observed as well. Meanwhile, we demonstrate that the planar perovskite solar cells (p-PSCs) fabricated in ambient air and utilizing optimized AO-TiO2 as electron transport layer (ETL) can deliver repeatable power conversion efficiency (PCE) over 13%, which possess superior open-circuit voltage (Voc) and higher fill factor (FF) compared to its counterpart utilizing conventional high temperature processed compact TiO2 (c-TiO2) as ETL. Through a further comparative study, it is indicated that the improvement of device performance should be attributed to more effective electron collection from perovskite layer to AO-TiO2 and the decrease of device series resistance. Furthermore, hysteresis effect about current density voltage (I-17) curves in TiO2-based p-PSCs is also unveiled.
机译:在这项工作中,为制造致密且均匀的二氧化钛薄膜(AO-TiO2),提出了一种简便而低温的阳极氧化方法。为了实现AO-TiO2的形貌和厚度控制,揭示了阳极氧化(AO)的理论,并观察了AO过程中诸如电解质成分和氧化电压等相关参数对AO-TiO2形成的影响。 。同时,我们证明了在环境空气中制造并利用优化的AO-TiO2作为电子传输层(ETL)的平面钙钛矿太阳能电池(p-PSCs)可以提供超过13%的可重复功率转换效率(PCE),它们具有优异的开路功率。与使用传统高温处理的紧凑型TiO2(c-TiO2)作为ETL的同类产品相比,它具有更高的电路电压(Voc)和更高的填充因子(FF)。通过进一步的比较研究表明,器件性能的提高应归因于从钙钛矿层到AO-TiO2的更有效的电子收集以及器件串联电阻的降低。此外,还揭示了基于TiO2的p-PSC中电流密度电压(I-17)曲线的磁滞效应。

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