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Low-temperature growth of uniform ultrathin TiO2 blocking layer for efficient perovskite solar cell
Organic Electronics ( IF 2.7 ) Pub Date : 2019-07-26 , DOI: 10.1016/j.orgel.2019.105379
Kuo-Wei Huang , Yu-Hung Chen , Ming-Hsien Li , Yao-Shan Wu , Pei-Ting Chiu , Yu-Pin Lin , Yung-Liang Tung , Song-Yeu Tsai , Peter Chen

Although chemical bath of TiCl4 treatment has been used to serve as a compact layer for planar perovskite solar cells (PSCs), uneven TiO2 particle sizes and chlorine residual would decrease the device performance. In this study, we modify the TiCl4 treatment process through well-controlled the kinetics grown of TiO2 nanoparticle, leading to a uniform and ultrathin TiO2 blocking layer. A dense and pinholeless TiO2 blocking layer is crucial for high-performance PSCs because of its effective charge extraction and elimination of carrier shunting path. The as-fabricated devices using modified process of TiO2 blocking layer exhibit the best power conversion efficiency (PCE) of 17.89% with an average PCE of 17.5%. Scanning electron microscopy and cyclic voltammetry analysis of TiO2 blocking layer reveal that this process improved surface uniformity and the carrier blocking capability.



中文翻译:

用于高效钙钛矿太阳能电池的均匀生长的超薄TiO 2阻挡层的低温生长

尽管已使用TiCl 4处理的化学浴作为平面钙钛矿太阳能电池(PSC)的致密​​层,但不均匀的TiO 2粒径和氯残留会降低器件性能。在这项研究中,我们通过很好地控制TiO 2纳米颗粒的生长动力学来修改TiCl 4处理工艺,从而形成均匀且超薄的TiO 2阻挡层。致密且无针孔的TiO 2阻挡层对高性能PSC至关重要,因为它可以有效地提取电荷并消除载流子分流路径。使用改进的TiO 2工艺制造的设备阻挡层表现出最佳的功率转换效率(PCE)为17.89%,平均PCE为17.5%。TiO 2阻挡层的扫描电子显微镜和循环伏安分析表明,该过程改善了表面均匀性和载流子阻挡能力。

更新日期:2019-07-26
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