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Fabrication of compact and stable perovskite films with optimized precursor composition in the fast-growing procedure 被引量:4
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作者 Tanghao Liu Yuanyuan Zhou +12 位作者 Qin Hu Ke Chen Yifei Zhang Wenqiang Yang Jiang Wu Fengjun Ye Deying Luo Kai Zhu Nitin R Padture Feng Liu Thomas RusselP Rui Zhu Qihuang Gong 《Science China Materials》 SCIE EI CSCD 2017年第7期608-616,共9页
The fast-growing procedure (FGP) provides a simple, high-yield and lead (Pb)-release free method to prepare perovskite films. In the FGP, the ultra-dilute per- ovskite precursor solution is drop-cast onto a hot (... The fast-growing procedure (FGP) provides a simple, high-yield and lead (Pb)-release free method to prepare perovskite films. In the FGP, the ultra-dilute per- ovskite precursor solution is drop-cast onto a hot (-240℃) substrate where a perovskite film grows immediately ac- companied by the rapid evaporation of the host solvent. In this process, all the raw materials in the precursor solution are deposited into the final perovskite film. The potential pollution caused by Pb can be significantly reduced. Proper- ties of the FGP-processed perovskite films can be modulated by the precursor composition. While CH3NH3CI (MACI) affects the crystallization process and leads to full surface coverage, CH(NHz)2I (FAI) enhances the thermal stability of the film. Based on the optimized precursor composition of PbI2.(1-x)FAI.xMACI, x=0.75, FGP-processed planar het- erojunction perovskite solar cells exhibit power conversion efficiencies (PCEs) exceeding 15% with suppressed hysteresis and excellent reproducibility. 展开更多
关键词 fast-growing procedure lead-release free precursorcomposition surface coverage thermal stability
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