A double perovskite participation for promoting stability and performance of Carbon-Based CsPbI2Br perovskite solar cells
A double perovskite participation for promoting stability and performance of Carbon-Based CsPbI2Br perovskite solar cells
复制标题
双钙钛矿参与可提高碳基CsPbI2Br钙钛矿太阳能电池的稳定性和性能
DOI：
10.1016/j.jcis.2021.07.122
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发表时间：
2022
影响因子：
9.9
通讯作者：
Ma Tingli
中科院分区：
文献类型：
--
作者：
Han Qianji;Yang Shuzhang;Wang Liang;Yu Fengyang;Cai Xiaoyong;Ma Tingli
全无机钙钛矿材料（通常为CsPbI2Br）由于其优异的热稳定性和合适的带隙而引起了极大的关注，并且它们在钙钛矿太阳能电池（PSC）中的应用已经得到了广泛的研究。然而，钙钛矿层不可避免的缺陷、钙钛矿和碳电极之间的能级失配以及CsPbI2Br的相不稳定性限制了碳基CsPbI2Br PSC的功率转换效率（PCE）和稳定性。在这里，我们展示了一个简单而有效的策略，调节能级，抑制载流子复合，并通过修改与新型的二维钙钛矿Cs2PtI6的CsPbI2Br的表面延缓钙钛矿的降解。碳基CsPbI2Br PSC实现了比对照装置（11.10%）更高的PCE（13.69%）。能级的良好匹配和载流子复合的抑制应该是效率提高的原因。此外，Cs2PtI6优异的疏水性能增强了器件的防潮性能。该研究为提高全无机CsPbI2Br PSC的性能和稳定性提供了一种潜在的策略。
All-inorganic perovskite materials (Typically: CsPbI2Br) have attracted enormous attention due to their illustrious thermal stability and appropriate bandgap, and their use in perovskite solar cells (PSCs) has been extensively investigated. However, the inevitable defects of the perovskite layer, energy level mismatch between perovskite and carbon electrodes, and the phase instability of CsPbI2Br limit the power conversion efficiency (PCE) and stability of carbon-based CsPbI2Br PSCs. Herein, we demonstrate a simple and effective strategy for regulating energy level, inhibiting carrier recombination, and delaying the degradation of perovskite by modifying the surface of CsPbI2Br with a new type of 2D perovskite Cs2PtI6. The carbon-based CsPbI2Br PSCs achieve a higher PCE (13.69 %) than the control device (11.10 %). The excellent matching of the energy level and suppression of charge carrier recombination should be responsible for the improvement in efficiency. Furthermore, the excellent hydrophobic performance of Cs2PtI6enhances the moisture resistance of the device. This study provides a potential strategy for improving the performance and stability of all-inorganic CsPbI2Br PSCs.