钙钛矿(结构)
材料科学
能量转换效率
制作
光电子学
极限(数学)
聚合物
纳米技术
化学工程
复合材料
数学分析
医学
工程类
病理
替代医学
数学
作者
Dachang Liu,Chen Chen,Xianzhao Wang,Xiuhong Sun,Bingqian Zhang,Qiangqiang Zhao,Zhipeng Li,Zhipeng Shao,Xiao Wang,Guanglei Cui,Shuping Pang
标识
DOI:10.1002/adma.202310962
摘要
Perovskite solar cells (PSCs) have attracted extensive attention due to their higher power conversion efficiency (PCE) and simple fabrication process. However, the open-circuit voltage (VOC) loss remains a significant impediment to enhance device performance. Here, a facile strategy to boost the VOC to 95.5% of the Shockley-Queisser (S-Q) limit through the introduction of a universal multifunctional polymer additive is demonstrated. This additive effectively passivates the cation and anion defects simultaneously, thereby leading to the transformation from the strong n-type to weak n-type of perovskite films. Benefitting from the energy level alignment and the suppression of bulk non-radiative recombination, the quasi-Fermi level splitting (QFLS) is enhanced. Consequently, the champion devices with 1.59 eV-based perovskite reach the highest VOC value of 1.24 V and a PCE of 23.86%. Furthermore, this strategy boosts the VOC by at least 0.07 V across five different perovskite systems, a PCE of 25.04% is achieved for 1.57 eV-based PSCs, and the corresponding module (14 cm2) also obtained a high PCE of 21.95%. This work provides an effective and universal strategy to promote the VOC approach to the detailed balance theoretical limit.
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