钝化
钙钛矿(结构)
接受者
能量转换效率
材料科学
部分
吩恶嗪
结晶
纳米技术
结晶学
光电子学
化学
立体化学
图层(电子)
有机化学
物理
吩噻嗪
药理学
医学
凝聚态物理
作者
Chieh-Ming Hung,Chi-Chi Wu,Po-Nien Tsao,Chen-Yu Lung,Chih‐Hsing Wang,I‐Chih Ni,C. Chu,Chun-Hao Cheng,Wei‐Wei Kuang,Chih-I Wu,Hsieh-Chih Chen,Yi‐Tsu Chan,Pi‐Tai Chou
标识
DOI:10.1002/aesr.202300042
摘要
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 cm 2 ) 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.
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