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A Review on Reducing Grain Boundaries and Morphological Improvement of Perovskite Solar Cells from Methodology and Material‐Based Perspectives
Author(s) -
Choi Hyuntae,
Choi Kyoungwon,
Choi Yelim,
Kim Taewan,
Lim Seyeong,
Park Taiho
Publication year - 2020
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201900569
Subject(s) - perovskite (structure) , grain boundary , materials science , crystallite , grain size , nanotechnology , crystal (programming language) , mineralogy , chemical engineering , metallurgy , geology , computer science , microstructure , engineering , programming language
Perovskite solar cells (PSCs) have achieved 25.2% of their certified efficiency and emerged as up‐and‐coming energy‐harvesting candidates owing to their superior properties. However, perovskite films are mainly polycrystalline films, and thus, the formation of grain boundaries (GBs) is inevitable. Since GBs have numerous defect sites that provide a channel for ion migration, reducing GBs is highly significant for achieving high efficiency and long‐term stability of PSCs. To this end, researchers have made efforts to produce a large crystal‐based perovskite film with reduced GBs. In this study, various methods that decrease GBs and enhance the morphology of perovskites are summarized and categorized into methodology‐ and material‐based approaches. Furthermore, a future research direction to produce high‐quality and large grain‐based perovskite film is also proposed.