Xiao Yuqing, Zhang Huijie, Zhao Yue, Liu Pei, Kondamareddy Kiran Kumar, Wang Changlei
School of Automation, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
Key Laboratory of Artificial Micro & Nano Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China.
Nanomaterials (Basel). 2023 Sep 26;13(19):2640. doi: 10.3390/nano13192640.
Carbon-based perovskite solar cells (C-PSCs) have the impressive characteristics of good stability and potential commercialization. The insulating layers play crucial roles in charge modulation at the buried perovskite interface in mesoporous C-PSCs. In this work, the effects of three different tunnel oxide layers on the performance of air-processed C-PSCs are scrutinized to unveil the passivating quality. Devices with ZrO-passivated TiO electron contacts exhibit higher power conversion efficiencies (PCEs) than their AlO and SiO counterparts. The porous feature and robust chemical properties of ZrO ensure the high quality of the perovskite absorber, thus ensuring the high repeatability of our devices. An efficiency level of 14.96% puts our device among the state-of-the-art hole-conductor-free C-PSCs, and our unencapsulated device maintains 88.9% of its initial performance after 11,520 h (480 days) of ambient storage. These results demonstrate that the function of tunnel oxides at the perovskite/electron contact interface is important to manipulate the charge transfer dynamics that critically affect the performance and stability of C-PSCs.
碳基钙钛矿太阳能电池（C-PSC）具有稳定性好和潜在商业化的显著特点。绝缘层在介孔C-PSC中埋入的钙钛矿界面处的电荷调制中起着关键作用。在这项工作中，研究了三种不同的隧道氧化层对空气处理的C-PSC性能的影响，以揭示其钝化质量。具有ZrO钝化的TiO电子接触的器件比其AlO和SiO对应物表现出更高的功率转换效率（PCE）。ZrO的多孔特性和稳健的化学性质确保了钙钛矿吸收层的高质量，从而确保了我们器件的高重复性。14.96%的效率水平使我们的器件跻身于最先进的无空穴导体C-PSC之列，并且我们的未封装器件在环境储存11520小时（480天）后仍保持其初始性能的88.9%。这些结果表明，隧道氧化物在钙钛矿/电子接触界面处的功能对于操纵电荷转移动力学很重要，而电荷转移动力学对C-PSC的性能和稳定性有至关重要的影响。
