Characterization on Highly Efficient Perovskite Solar Cells Made from One‐Step and Two‐Step Solution Processes

• DOI: 10.1002/solr.202100109
• Publication Date: 2021-03-26T16:09:18Z
• Authors: Tzu-Sen Su; Tzu-En Fan; Hio-Kun Si; Duc-Anh Le; Nideesh Perumbala...; Tzu-Chien Wei
• Keywords: Characterization; Two step; One-Step

One‐step and two‐step methods are regarded as the main solution processes for preparing organic metal halide perovskite (PVSK) films. Both of them also reported to produce high‐quality PVSK films high‐performance devices. Herein, two highly efficient solar cells (PSCs) made by one‐step (19.91%) (20.63%) analyzed in detail. Particularly, nucleation mechanism structural characteristics from different systematically discussed. Characterizations field‐emission scanning electron microscopy (FE‐SEM), atomic force (AFM), Kelvin probe (KPFM), time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) show that distribution film method is less uniform horizontally, while vertically. contain a considerable amount unreacted species, including PbI 2 , cations, halides, which relics their parental fabricating process. Despite these significant differences, both capable deliver nearly 20% conversion efficiency. This study depicts clear picture properties provides plentiful information further improvement future.