高等学校化学学报2023，Vol.44Issue(7)：149-159,11.DOI:10.7503/cjcu20230147
理解多尺度形貌中的共混相结构以制备高性能光伏电池
Understanding the Mixing Phase Structure in Multi-length-scale Morphology to Arrest High-performance Photovoltaic Devices
摘要
Abstract
The properties of the mixing phase are investigated in detail by introducing PC71BM into two typical organic photovoltaic blends J51:N2200 and PM6:Y6.It is found that the process of exciton dissociation and carrier transport in the mixing zone play a key role in determining the power conversion efficiency.In J51:N2200:PC71BM blend,the aggregation of PC71BM in the mixing zone brings in energetic barrier to inhibit the hole transfer process.In the meanwhile,the enlarged intervals in-between the double fibril network limit the effective diffusion of the split electrons and holes in the mixing zone,leading to large recombination and energy loss.While in PM6:Y6:PC71BM blend,the introduced PC71BM could homogeneously distribute in the amorphous zone,mixing well with PM6 and Y6 molecules.Meanwhile,the addition of PC71BM does not perturb the hole transfer from Y6 to PM6.Such a morphology is advantageous where electrons and holes generated at abundant donor/acceptor interface could diffuse out rapidly,and transport in the crystalline pathway towards the corresponding electrodes.Such results reveal the importance of manipulating the mixing phase structure in the multi-length-scale morphology,of high demand towards 20%efficien-cy in the next episode organic solar cell(OSC)development.关键词
共混相/多尺度形貌/有机光伏/光电转换效率Key words
Mixing phase/Multi-length-scale morphology/Organic photovoltaics/Power conversion efficiency分类
化学引用本文复制引用
张明,张永明,刘烽,钟文楷,钱诗赟,吕博赛,周冠清,薛晓南,周子春,史志文,朱磊..理解多尺度形貌中的共混相结构以制备高性能光伏电池[J].高等学校化学学报,2023,44(7):149-159,11.基金项目
国家自然科学基金(批准号:51973110,22109094)和中国博士后科学基金(批准号:2022M722072,2022T150406)资助.Supported by the National Natural Science Foundation of China(Nos.51973110,22109094)and the China Postdoctoral Science Foundation(Nos.2022M722072,2022T150406). （批准号:51973110,22109094）
