Reconfiguration toward Self-Assembled Monolayer Passivation for High-Performance Perovskite Solar Cells,Advanced Energy Materials

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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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