钙钛矿(结构)
材料科学
理论(学习稳定性)
工程物理
纳米技术
工程类
计算机科学
化学工程
机器学习
作者
Da Seul Lee,Ki Woong Kim,You‐Hyun Seo,Myung Hyun Ann,Wonkyu Lee,Jiyeon Nam,Jaehoon Chung,Gabkyung Seo,Seongsik Nam,Boo Soo,Taegeon Kim,Yoonmook Kang,Nam Joong Jeon,Jangwon Seo,Seong Sik Shin
出处
期刊:Joule
[Elsevier]
日期:2024-02-01
标识
DOI:10.1016/j.joule.2024.02.008
摘要
Summary
Despite the remarkable growth of perovskite photovoltaic technology, the performance and stability of flexible perovskite solar modules (f-PSMs) are still below the commercial level, and even the clear reasons for this have hardly been elucidated. Here, we found that flexible perovskite solar cells (f-PSCs) suffer from a trade-off between efficiency and stability due to the off-balance between surface coverage and the charge-transporting property when conventionally using colloidal SnO2 nanoparticles as an electron-transport layer (ETL). To resolve this trade-off, we newly designed an ETL that enhances the charge transport properties and mitigates the shunt sites, resulting in improved efficiency and operational stability. Therefore, we succeeded in achieving a certified efficiency of 21.8% in f-PSC (22.92% in-house) and 16.4% in f-PSM (900 cm2). Furthermore, we discovered that incomplete coverage gives rise to the formation of a shunt pathway, causing the current crowding effect, which could have a significant impact on long-term operational stability.
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