Shih Chung-Yueh, Huang Jian-Zhi, Chen Mei-Hsin, Hsu Cheng-Che, Wu Chih-I, Cheng I-Chun, Chen Jian-Zhang
Graduate Institute of Applied Mechanics, National Taiwan University, Taipei City 10617, Taiwan.
Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei City 10617, Taiwan.
Polymers (Basel). 2021 Nov 20;13(22):4020. doi: 10.3390/polym13224020.
A bathocuproine (BCP) layer is typically used as the hole-blocking layer in p-i-n-structure perovskite solar cells (PSCs) between PCBM and Ag electrodes. Before evaporating the Ag, we used a low-temperature (<40 °C) atmospheric-pressure dielectric barrier discharge jet (DBDjet) to treat the BCP with different scan rates. The main purpose of this was to change the contact resistance between the BCP layer and the Ag electrodes through surface modification using a DBDjet. The best power conversion efficiency (PCE) of 13.11% was achieved at a DBDjet scan rate of 2 cm/s. The He DBDjet treatment introduced nitrogen to form C-N bonds and create pits on the BCP layer. This deteriorated the interface between the BCP and the follow-up deposited-Ag top electrode. Compared to the device without the plasma treatment on the BCP layer, the He DBDjet treatment on the BCP layer reduced photocurrent hysteresis but deteriorated the fill factor and the efficiency of the PSCs.
浴铜灵（BCP）层通常用作p-i-n结构钙钛矿太阳能电池（PSC）中PCBM与银电极之间的空穴阻挡层。在蒸发银之前，我们使用低温（<40°C）大气压介质阻挡放电射流（DBDjet）以不同的扫描速率处理BCP。这样做的主要目的是通过使用DBDjet进行表面改性来改变BCP层与银电极之间的接触电阻。在DBDjet扫描速率为2 cm/s时实现了13.11%的最佳功率转换效率（PCE）。氦DBDjet处理引入氮以形成C-N键并在BCP层上产生凹坑。这使BCP与后续沉积的银顶电极之间的界面恶化。与未对BCP层进行等离子体处理的器件相比，对BCP层进行氦DBDjet处理减少了光电流滞后，但降低了PSC的填充因子和效率。
