Yang Jien, Xu Jinjin, Zhang Qiong, Xue Zhilin, Liu Hairui, Qin Ruiping, Zhai Haifa, Yuan Mingjian
Henan Key Laboratory of Photovoltaic Materials, School of Physics, Henan Normal University Xinxiang China
School of Materials Science and Engineering, Henan Normal University Xinxiang 453007 China.
RSC Adv. 2020 May 18;10(32):18608-18613. doi: 10.1039/d0ra02583f. eCollection 2020 May 14.
Despite the successful enhancement in the high-power conversion efficiency (PCE) of perovskite solar cells (PSCs), the poor stability of PSCs is one of the major issues preventing their commercialization. The attenuation of PSCs may be due to the lower heat resistance of the organic charge transport layer and the tendency to aggregate at high temperatures. Here we report cerium oxide (CeO ) as an electron transport layer (ETL) prepared through a simple solution processed at a low temperature (∼100 °C) to replace the organic charge transport layer on top of the inverted planar PSCs. The CeO layer has excellent charge selectivity and can provide the perovskite film with protection against moisture and metal reactions with the electrode. The solar cell with CeO as the electron transport layer has a power conversion efficiency of 17.47%. These results may prove a prospect for practical applications.
尽管钙钛矿太阳能电池（PSC）的功率转换效率（PCE）已成功提高，但PSC稳定性差是阻碍其商业化的主要问题之一。PSC的衰减可能是由于有机电荷传输层的耐热性较低以及在高温下聚集的趋势。在此，我们报告了通过低温（约100°C）简单溶液处理制备的氧化铈（CeO）作为电子传输层（ETL），以取代倒置平面PSC顶部的有机电荷传输层。CeO层具有出色的电荷选择性，并且可以为钙钛矿薄膜提供防潮保护以及防止金属与电极发生反应。以CeO作为电子传输层的太阳能电池的功率转换效率为17.47%。这些结果可能为实际应用提供了前景。
