钙钛矿(结构)
卤化物
成核
材料科学
开尔文探针力显微镜
一步到位
两步走
薄膜
二次离子质谱法
化学工程
纳米技术
表征(材料科学)
原子力显微镜
扫描电子显微镜
离子
分析化学(期刊)
化学
结晶学
无机化学
复合材料
色谱法
工程类
有机化学
组合化学
作者
Tzu‐Sen Su,Tzu-En Fan,Hio-Kun Si,Duc‐Anh Le,Nideesh Perumbalathodi,Tzu‐Chien Wei
出处
期刊:Solar RRL
[Wiley]
日期:2021-03-26
卷期号:5 (7)
被引量:6
标识
DOI:10.1002/solr.202100109
摘要
One‐step and two‐step methods are regarded as the main solution processes for preparing organic metal halide perovskite (PVSK) films. Both of them are also reported to produce high‐quality PVSK films and high‐performance devices. Herein, two highly efficient perovskite solar cells (PSCs) made by one‐step (19.91%) and two‐step (20.63%) methods are analyzed in detail. Particularly, the nucleation mechanism and structural characteristics of the PVSK films made from different methods are systematically discussed. Characterizations from field‐emission scanning electron microscopy (FE‐SEM), atomic force microscopy (AFM), Kelvin probe force microscopy (KPFM), and time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) show that the ion distribution in the PVSK film made by the one‐step method is less uniform horizontally, while the PVSK film made by the two‐step method is less uniform vertically. Both films contain a considerable amount of unreacted species, including PbI 2 , cations, and halides, which are relics from their parental fabricating process. Despite these significant differences, both films are capable to deliver nearly 20% conversion efficiency. This study depicts a clear picture of the PVSK film properties made by one‐step and two‐step methods and provides plentiful information for further improvement in the future.
科研通智能强力驱动
Strongly Powered by AbleSci AI