Wan Zhe, Yang Liping, Liang Zhen, Li Shuxia, Chen Li, Liu Xin, Li Peng, Xia Yangjun, Kang Ning, Wang Chenglong
National Engineering Research Center for Technology and Equipment of Environmental Deposition, Solar Thermal Industry Research Institute of Gansu Province, Lanzhou Jiaotong University, Lanzhou, 730070, P. R. China.
Organic Semiconductor Materials and Applied Technology Research Centre of Gansu Province, School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, P. R. China.
ChemSusChem. 2025 Sep 1;18(17):e202500196. doi: 10.1002/cssc.202500196. Epub 2025 Jun 27.
Europium oleate (Eu(OA)) is designed as a multifunctional passivation layer coated onto methylammonium lead iodide (MAPbI) films to delay the degradation of perovskite solar cells (PSCs) caused by moisture and heat. The carbonyl group and Eu ions of Eu(OA) subsequently coordinate with uncoordinated Pb and I ions to form a moisture-proof and heat-dissipating layer anchored onto both top and side surfaces of the perovskite film. The hydrophobicity of the MAPbI film treated by Eu(OA) remarkably increases, as demonstrated by the enhancement of the average contact angle from 54.9° to 90.5°. Besides, the thermal conductivity of PSCs incorporated with Eu(OA) is 1.3 times that of the control device, resulting in a 1.34 °C reduction on surface temperature at 85 °C. The optimized PSCs demonstrate a T lifetime of 1056 h (only 180 h for pristine PSCs) at conditions of room temperature and relative humidity (RH) of 40%. Moreover, the T lifetime for optimized PSCs is four times that of the control device at 85 °C and RH of 85%. Finally, the power conversion efficiency (PCE) of PSCs treated with Eu(OA) increases from 17.36 to 18.99%, attributed to the effective defect passivation and suppression of nonradiative recombination.
油酸铕（Eu(OA)）被设计为一种涂覆在甲基铵碘化铅（MAPbI）薄膜上的多功能钝化层，以延缓由湿气和热量引起的钙钛矿太阳能电池（PSC）的降解。Eu(OA)的羰基和Eu离子随后与未配位的Pb和I离子配位，形成一个锚定在钙钛矿薄膜顶面和侧面的防潮散热层。经Eu(OA)处理的MAPbI薄膜的疏水性显著增加，平均接触角从54.9°提高到90.5°就证明了这一点。此外，掺入Eu(OA)的PSC的热导率是对照器件的1.3倍，在85°C时表面温度降低了1.34°C。优化后的PSC在室温及40%相对湿度（RH）条件下的T寿命为1056小时（原始PSC仅为180小时）。此外，在85°C和85%RH条件下，优化后的PSC的T寿命是对照器件的四倍。最后，经Eu(OA)处理的PSC的功率转换效率（PCE）从17.36%提高到18.99%，这归因于有效的缺陷钝化和对非辐射复合的抑制。
