Intrinsic and extrinsic stability of triple-cation perovskite solar cells through synergistic influence of organic additive

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Mali, Sawanta S. and Patil, Jyoti V. and Park, Dae Woong and Jung, Young Hee and Hong, Chang Kook (2022) Intrinsic and extrinsic stability of triple-cation perovskite solar cells through synergistic influence of organic additive. Cell Reports Physical Science, 3 (6). 100906. ISSN 2666-3864 (https://doi.org/10.1016/j.xcrp.2022.100906)

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Abstract

Surface- or bulk-passivation using organic additives plays a critical role in improving the performance and stability of hybrid perovskite solar cells (HPSCs). Here, we report 2-hydroxyethyl acrylate (HEA) as an additive to reduce crystallization and passivate defects. Because of the dual functionality of the HEA additive, the optimized HPSCs yield 22.05% and 21.46% power conversion efficiency (PCE), respectively, for mesostructured negative-intrinsic-positive (n-i-p)- and planar positive-intrinsic-negative (p-i-n)-type device configurations, which is much higher than control devices. Large devices with 1 cm2 active area also produce a promising 20.03% PCE, which is comparable to the current efficiency. Time-of-flight secondary ion mass spectroscopy (TOF-SIMS) measurement analysis indicates the HEA settles not only in grain boundaries but also within the perovskite grain, which facilitates passivation and suppresses halogen-ion migration. Importantly, photostability analysis reveals negligible efficiency loss over 1,000 h under continuous 1 sun illumination under different environmental conditions.

ORCID iDs

Mali, Sawanta S. ORCID logoORCID: https://orcid.org/0000-0002-4973-4203, Patil, Jyoti V., Park, Dae Woong, Jung, Young Hee and Hong, Chang Kook;
CORE (COnnecting REpositories)