材料科学
形态学(生物学)
有机太阳能电池
化学工程
纳米技术
复合材料
聚合物
遗传学
生物
工程类
作者
Xinyue Cui,Yitong Ji,Yuqiang Liu,Xueqing Ma,Hongxiang Li,Pei Cheng,Wenchao Huang,Zhishan Bo
标识
DOI:10.1002/aenm.202403077
摘要
Abstract Controlling the packing feature and film morphology of active layers is the precondition for achieving highly efficient organic solar cells (OSCs). The growth transition of donors and acceptors from solution to solid films plays an intrinsic role in shaping these features. In this study, two simple additives, cyanobenzene (CNB) and 1,4‐dicyanobenzene (DCNB), are presented to modulate the growth process of active layers to investigate the impact of growth behaviors on molecule packing quality, film morphology, and device performances. Both additives prolong the nucleation and growth period of active layers, resulting in improved molecular packing quality, domain purity, and crystallization. This optimization enhances charge extraction efficiency as well as reduces charge recombination losses. Consequently, devices based on D18:BTP‐eC9‐4F processed with additives obtain a 19.43% power conversion efficiency (PCE). Furthermore, a PCE of 14.35% is achieved for bladed‐coated organic solar modules on 5 cm × 5 cm substrates. These findings underscore the importance of growth processes on film quality and illustrate their fundamental relationship, which promises further advancements in OSC technology.
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