Yang Qu, Zhang Haozhe, Jiang Zhuojun, Shen Hui, Gong Xiu
College of Physics, Guizhou Province Key Laboratory for Optoelectronic Technology and Application, Guizhou University, Guiyang, 550025, China.
Adv Mater. 2025 Apr;37(16):e2500268. doi: 10.1002/adma.202500268. Epub 2025 Mar 10.
Stability testing protocols from the International Summit on Organic and Hybrid Solar Cell Stability (ISOS) are essential for standardizing studies on the photothermally operational stability of perovskite solar cells (PSCs). Under photothermal conditions, the migration of oxygen from SnO layer induces cationic dehydrogenation at the A-site of the perovskite, accelerating degradation to PbI. This leads to the formation of photoinduced I and Pb defects, significantly compromising long-term stability. In this study, ordonezite (ZnSbO) as a multifunctional electron transport layer (ETL) that captures migrating oxygen atoms at the SnO/perovskite interface is introduced, effectively preventing degradation of the buried interface. Additionally, the lattice match between ZnSbO and perovskite facilitates well-ordered perovskite film growth. As a result, PSCs featuring ZnSbO ETLs achieved a high power conversion efficiency of 25.02% and retained 90.62% of their initial performance after 1000 h under the ISOS-D-2 protocol. Furthermore, devices demonstrated remarkable thermal stability, maintaining 83.69% of their original performance after 800 h of maximum power point tracking at 85 °C, meeting the stringent ISOS-L-2 protocol requirements.
国际有机和混合太阳能电池稳定性峰会（ISOS）的稳定性测试协议对于规范钙钛矿太阳能电池（PSC）光热运行稳定性的研究至关重要。在光热条件下，氧气从SnO层迁移会导致钙钛矿A位的阳离子脱氢，加速向PbI的降解。这会导致光致I和Pb缺陷的形成，严重损害长期稳定性。在本研究中，引入了钙锌矿（ZnSbO）作为多功能电子传输层（ETL），它在SnO/钙钛矿界面捕获迁移的氧原子，有效防止掩埋界面的降解。此外，ZnSbO与钙钛矿之间的晶格匹配有助于钙钛矿薄膜有序生长。结果，具有ZnSbO ETL的PSC实现了25.02%的高功率转换效率，并在ISOS-D-2协议下1000小时后保留了其初始性能的90.62%。此外，器件表现出显著的热稳定性，在85°C下最大功率点跟踪800小时后保持其原始性能的83.69%，满足严格的ISOS-L-2协议要求。
