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Reconfiguration toward Self-Assembled Monolayer Passivation for High-Performance Perovskite Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-11-29 , DOI: 10.1002/aenm.202202799
Zijing Chen 1, 2 , Yiming Li 1, 3 , Zhenghao Liu 1, 2 , Jiangjian Shi 1 , Bingcheng Yu 1, 3 , Shan Tan 1, 3 , Yuqi Cui 1, 2 , Chengyu Tan 1, 2 , Fubo Tian 4 , Huijue Wu 1 , Yanhong Luo 1, 2, 5 , Dongmei Li 1, 5 , Qingbo Meng 1, 5, 6
Affiliation  

Self-assembled monolayers (SAMs) with unique ordered structures and varied anchoring groups have emerged as an excellent interfacial strategy for perovskite solar cells (PSCs). Herein, 3-carboxypropyl-triphenyl phosphonium bromide with the participation of the fullerene derivative [6,6]-phenyl-C61-butyric acid (PCBA) as functionalized C-PCBA SAM, is introduced to stably modify the TiO2/perovskite interface. In the meantime, with strong fullerene cage–iodide interaction, ordered C-PCBA SAM can passivate interfacial defects and improve the electron transportation. A high efficiency of 24.8% and stabilized power output of 23.9%, are achieved with negligible hysteresis, which is among the best performances for TiO2 planar PSCs. This modified cell also exhibits significantly improved stabilities under different testing conditions; non-encapsulated devices can maintain 95% of initial efficiency after 1000 h thermal stability testing at 85 °C and 85% after 700 h continuous illumination (≈100 mW cm−2) and maximum-power-point tracking. This work provides valuable inspiration for developing highly efficient and stable PSCs by using a convenient SAM reconfiguration strategy.

中文翻译:

高性能钙钛矿太阳能电池的自组装单层钝化重构

具有独特有序结构和不同锚定基团的自组装单层膜 (SAM) 已成为钙钛矿太阳能电池 (PSC) 的一种出色的界面策略。在此,引入富勒烯衍生物[6,6]-苯基-C 61 -丁酸(PCBA)作为功能化C-PCBA SAM的3-羧丙基-三苯基溴化磷稳定修饰TiO 2 /钙钛矿界面. 同时,具有强富勒烯笼-碘化物相互作用的有序 C-PCBA SAM 可以钝化界面缺陷并改善电子传输。实现了 24.8% 的高效率和 23.9% 的稳定功率输出,滞后可忽略不计,这是 TiO 2的最佳性能之一 平面 PSC。这种修改后的电池在不同的测试条件下也表现出显着改善的稳定性;非封装器件在 85 °C 下进行 1000 小时热稳定性测试后可保持 95% 的初始效率,在 700 小时连续照明(≈100 mW cm -2)和最大功率点跟踪后可保持 85% 的初始效率。这项工作为通过使用方便的 SAM 重构策略开发高效稳定的 PSC 提供了宝贵的灵感。
更新日期:2022-11-29
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