Hu Yanqiang, Xu Zong, Wang Zhi, Zhou Yifan, Song Wenwu, Gao Yushuang, Sun Guangping, Sun Tongming, Zhang Shufang, Tang Yanfeng
College of Chemistry and Chemical Engineer, Nantong University, Nantong 226001, Jiangsu, China.
School of Physics and Photoelectronic Engineering, Ludong University, Yantai 264025, Shandong, China.
Phys Chem Chem Phys. 2023 Mar 22;25(12):8403-8411. doi: 10.1039/d3cp00514c.
SnO-based planar perovskite solar cells (PSCs) are considered as potential photovoltaic candidates due to their simple structures and cost-effective preparation processes. However, the extensive defects accumulated at the buried interface between perovskite and SnO greatly hinder the further improvement of PSC efficiency and stability. Herein, the potassium salt of anthraquinone-1,8-disulfonate (ASPS) is used as a novel multifunctional interfacial modifier to improve the carrier transport performance at the buried interface and optimize the quality of the upper perovskite light absorber layer (PVK) in PSCs. Owing to the synergistic effect of sulfonic acid groups, carbonyl groups and potassium ions in ASPS, the accumulated defects at the buried interface are passivated, the energy level arrangement of the interface is optimized, and the crystalline quality and optoelectronic properties of the PVK films are improved. As a result, the power conversion efficiency (PCE) improved significantly from 21.36% for the controlled device to 23.96% for the ASPS-modified device. Furthermore, the unencapsulated ASPS-modified device also exhibited better storage stability and thermal stability than the controlled device.
基于SnO的平面钙钛矿太阳能电池（PSC）因其结构简单和制备工艺具有成本效益而被视为潜在的光伏候选材料。然而，在钙钛矿与SnO之间的掩埋界面处积累的大量缺陷极大地阻碍了PSC效率和稳定性的进一步提高。在此，蒽醌-1,8-二磺酸盐（ASPS）的钾盐被用作一种新型多功能界面改性剂，以改善掩埋界面处的载流子传输性能，并优化PSC中上层钙钛矿光吸收层（PVK）的质量。由于ASPS中磺酸基团、羰基和钾离子的协同作用，掩埋界面处积累的缺陷被钝化，界面的能级排列得到优化，PVK薄膜的结晶质量和光电性能得到改善。结果，功率转换效率（PCE）从对照器件的21.36%显著提高到ASPS改性器件的23.96%。此外，未封装的ASPS改性器件也表现出比对照器件更好的存储稳定性和热稳定性。
