材料科学
钙钛矿(结构)
拉伤
相对湿度
结晶学
能量转换效率
放松(心理学)
光伏系统
化学工程
化学
光电子学
物理
热力学
工程类
内科学
生物
社会心理学
医学
生态学
心理学
作者
Qian Cheng,Boxin Wang,Gaosheng Huang,Yanxun Li,Xing Li,Jieyi Chen,Shengli Yue,Kang Li,Hong Zhang,Yuan Zhang,Huiqiong Zhou
标识
DOI:10.1002/anie.202208264
摘要
Although the photovoltaic performance of perovskite solar cells (PSCs) has reached the commercial standards, the unsatisfactory stability limits their further application. Hydrophobic interface and encapsulation can block the damage of water and oxygen, while the instability induced by intrinsic residual strain remains inevitable. Here, the residual strain in a two-dimensional (2D) Ruddlesden-Popper (RP) perovskite film is investigated by X-ray diffraction and atomic force microscopy. It's found that the spacer cations contribute to the residual strain even though they are not in the inorganic cages. Benefited from strain relaxation, the film quality is improved, leading to suppressed recombination, promoted charge transport and enhanced efficiency. More significantly, the strain-released devices maintain 86 % of the initial efficiency after being kept in air with 85 % relative humidity (RH) for 1080 h, 82 % under maximum power point (MPP) tracking at 50 °C for 804 h and 86 % after continuous heating at 85 °C for 1080 h.
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