钙钛矿(结构)
化学
化学工程
结晶
形态学(生物学)
相(物质)
异质结
磁滞
能量转换效率
材料科学
矿物学
光电子学
结晶学
有机化学
地质学
物理
工程类
古生物学
量子力学
作者
Lijian Zuo,Shiqi Dong,Nicholas De Marco,Yao‐Tsung Hsieh,Sang‐Hoon Bae,Pengyu Sun,Yang Yang
摘要
Morphology is critical component to achieve high device performance hybrid perovskite solar cells. Here, we develop a vapor induced intermediate phase (VIP) strategy to manipulate the morphology of perovskite films. By exposing the perovskite precursor films to different saturated solvent vapor atmospheres, e.g., dimethylformamide and dimethylsufoxide, dramatic film morphological evolution occurs, associated with the formation of different intermediate phases. We observe that the crystallization kinetics is significantly altered due to the formation of these intermediate phases, yielding highly crystalline perovskite films with less defect states and high carrier lifetimes. The perovskite solar cells with the reconstructed films exhibits the highest power conversion efficiency (PCE) up to 19.2% under 1 sun AM 1.5G irradiance, which is among the highest planar heterojunction perovskite solar cells. Also, the perovskite solar cells with VIP processing shows less hysteresis behavior and a stabilized power output over 18%. Our work opens up a new direction for morphology control through intermediate phase formation, and paves the way toward further enhancing the device performances of perovskite solar cells.
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