4.6 Review

Stability of perovskite solar cells: issues and prospects

Journal

RSC ADVANCES
Volume 13, Issue 3, Pages 1787-1810

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra05903g

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Although the power conversion efficiency of perovskite solar cells (PSCs) has reached 25.8%, their commercialization is hindered by poor stability. Researchers worldwide have employed various initiatives, such as structural modification and fabrication techniques, to improve the stability. This review addresses recent advancements in PSCs regarding structural modification and fabrication procedures, with a focus on the effect of fabrication processes on device stability.
Even though power conversion efficiency has already reached 25.8%, poor stability is one of the major challenges hindering the commercialization of perovskite solar cells (PSCs). Several initiatives, such as structural modification and fabrication techniques by numerous ways, have been employed by researchers around the world to achieve the desired level of stability. The goal of this review is to address the recent improvements in PSCs in terms of structural modification and fabrication procedures. Perovskite films are used to provide a broad range of stability and to lose up to 20% of their initial performance. A thorough comprehension of the effect of the fabrication process on the device's stability is considered to be crucial in order to provide the foundation for future attempts. We summarize several commonly used fabrication techniques - spin coating, doctor blade, sequential deposition, hybrid chemical vapor, and alternating layer-by-layer. The evolution of device structure from regular to inverted, HTL free, and ETL including the changes in material utilization from organic to inorganic, as well as the perovskite material are presented in a systematic manner. We also aimed to gain insight into the functioning stability of PSCs, as well as practical information on how to increase their operational longevity through sensible device fabrication and materials processing, to promote PSC commercialization at the end.

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