施主-π-受主空穴传输材料的功能化增强了倒置钙钛矿太阳能电池的结晶和缺陷钝化：实现>21%（面积：1.96 cm2）的功率转换效率和令人印象深刻的稳定性,Advanced Energy and Sustainability Research

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施主-π-受主空穴传输材料的功能化增强了倒置钙钛矿太阳能电池的结晶和缺陷钝化：实现>21%（面积：1.96 cm2）的功率转换效率和令人印象深刻的稳定性
Advanced Energy and Sustainability Research ( IF 6.2 ) Pub Date : 2023-05-24 , DOI: 10.1002/aesr.202300042
Chieh-Ming Hung, Chi-Chi Wu, Po-Hsiung Tsao, Chia-Di Lung, Chih-Hsing Wang, I-Chih Ni, Che-Chun Chu, Chun-Hao Cheng, Wen-Yang Kuang, Chih-I Wu, Hsieh-Chih Chen, Yi-Tsu Chan, Pi-Tai Chou

倒置钙钛矿太阳能电池（PSC）主要采用聚三芳胺（PTAA）作为空穴传输材料（HTM），由于其疏水性、最高占据分子轨道能级较高以及钝化基团的缺乏，通常会导致界面接触较差。本文展示了一系列以2,2′:6′,2″-三联吡啶(TPy)为受体、苯环为π-结构的供体-π-受体(D-π-A)型小分子。连接器，并结合各种捐助者作为 HTM。这些涂覆在 PTAA 上的基于 TPy 的分子可以控制能级和表面润湿性，但吩恶嗪 (POZ) 供体的掺入对于增强电荷传输和缺陷钝化可以发挥重要作用，从而同时解决上述问题。电源转换效率最高22。优化后的POZ-TPy_修饰器件的VOC）为1.15 V，短路电流密度（J _SC）为23.96 mA cm ^{-2 ，填充因子（FF）为81.16%。}而且，大型POZ-TPy修饰器件（1.96 cm ² ）的功率PCE仍可达到21%以上。这些结果是倒置 PSC 效率最高的结果之一，表明POZ-TPy HTM 在未来钙钛矿应用中的巨大潜力。

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Functionalization of Donor–π–Acceptor Hole Transport Materials Enhances Crystallization and Defect Passivation in Inverted Perovskite Solar Cells: Achieving Power Conversion Efficiency >21% (Area: 1.96 cm2) and Impressive Stability

Inverted perovskite solar cells (PSCs) mainly adopt polytriarylamine (PTAA) for the hole transport material (HTM), which usually brings about inferior interfacial contact owing to their hydrophobicity, high-lying highest occupied molecular orbital energy level, and deficiency of passivation groups. Herein, a series of donor–π–acceptor (D–π–A) type small molecules is demonstrated based on 2,2′:6′,2″-terpyridine (TPy) as the acceptor moiety, benzene ring as the π-linker, and incorporating various donors to act as HTMs. These TPy-based molecules coated atop PTAA manipulate the energy level and surface wettability, but the incorporation of the phenoxazine (POZ) donor can be prominent for enhancing charge transport and defect passivation, thereby simultaneously addressing the above-mentioned issues. The highest power conversion efficiency of 22.36% can be achieved with an open-circuit voltage (V_OC) of 1.15 V, a short-circuit current density (J_SC) of 23.96 mA cm⁻², and a fill factor (FF) of 81.16% for the optimized POZ-TPy-modified device. Moreover, the power PCE of a large POZ-TPy-modified device (1.96 cm²) can still reach more than 21%. These results are among one of the highest efficiencies for inverted PSCs, indicating the enormous potential of POZ-TPy HTM in future perovskite applications.

更新日期：2023-05-24

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