材料科学
有机太阳能电池
戒指(化学)
合金
光电子学
复合材料
有机化学
聚合物
化学
作者
Chenyang Han,Huanhuan Gao,Yuanyuan Kan,Zuyan Xu,Xinyue Jiang,Chengmin Shen,Longxing Ni,Zhiyi Lv,Zhan Zhang,Lei Wang,Juan Antonio Zapien,Yingguo Yang,Yanna Sun,Ke Gao
标识
DOI:10.1002/aenm.202304063
摘要
Abstract Simple chemical structure and simplified synthesis process of active layer materials are critical for advancing the practical application of organic solar cells. Herin, two completely non‐fused ring electron acceptors BTZT‐2Cl and BTZT‐4Cl are developed. BTZT‐4Cl exhibits an enhanced absorption band, increases electrostatic potential differences with D18, and improves crystallinity and molecular packing properties. Consequently, the binary device based on BTZT‐4Cl displays a markedly improved efficiency of 14.12%, compared to the BTZT‐2Cl‐based device, which only achieves a moderate efficiency of 11.25%. More importantly, an alloy‐like structure can be formed by incorporating a small amount of high miscibility and compatibility BTZT‐2Cl. The ternary blend exhibits more compact molecular packing, efficient exciton dissociation, and an extended charge carrier lifetime due to the formation of an alloy‐like structure. The ternary device achieves a decent efficiency of 15.41% with superior thermal stability and a high T 80 lifetime over 1600 h after being aged at 65 °C. These results establish it as the most efficient among devices based on completely non‐fused ring acceptors with both high efficiency and voltage. This study demonstrates a simple material design strategy and high‐performance device optimization techniques, which are critical for advancing practical applications in the OSC field.
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