材料科学
烷烃
钙钛矿(结构)
纳米晶
氯苯
辛烷值
甲苯
化学工程
能量转换效率
纳米技术
光电子学
催化作用
有机化学
化学
工程类
作者
Xiaofeng Jiang,Bing Han,Han Gao,Xihan Chen,Zhenhua Chen,Shaokuan Gong,Xianchang Yan,Wenming Tian,Xusheng Zhang,Tian Chen,Xiyuan Feng,Guocong Chen,Dong He,Yonghong Deng,Shengye Jin,Peter R. Slater,Zhaojian He
标识
DOI:10.1002/aenm.202300566
摘要
Abstract To address the toxicity concern of extensively used chlorobenzene (CB) and toluene antisolvents, it is urgent to explore green and more efficient antisolvents. In this work, a general and highly reproducible methodology of employing CsPbI 3 nanocrystals (NCs) functionalized green alkanes with ultralow‐polarity (Alkane/NCs) as antisolvents to fabricate high‐quality perovskite films is reported. Compared with the CB processed, the perovskite films with much improved quality and high‐orientation are achieved by the Alkane/NCs approach. NCs in the alkane antisolvents are proven to provide enough heterogeneous nuclei, solving effectively the discontinuous film problem encountered from using pure alkanes. Strikingly, the lattice anchoring effect of NCs accounts for the high‐orientation growth of the perovskite films as revealed directly by cryo‐electron microscopy (cryo‐EM). Moreover, the phase segregation that easily occur in the CB processed perovskite film is successfully suppressed by the Alkane/NCs method. The optimal device conversion efficiency is enhanced from 21.59% to 23.10% from CB to octane (OCT)/NCs. Impressively, the alkane/NCs processed perovskite films and their devices exhibit much improved stability over CB, with the conversion efficiency remaining at 94% of its initial value after 500 h light soaking for OCT/NCs device, while the CB device fails at around 100 h.
科研通智能强力驱动
Strongly Powered by AbleSci AI