Efficient carbazole-based small-molecule organic solar cells with an improved fill factor

In this study, a new acceptor–donor–acceptor (A–D–A) small molecule, DI3TCz, with carbazole as the central unit and 1,3-indanedione as the end group, was designed and synthesized for application in organic solar cells. In contrast to the molecule DR3TCz with rhodanine as end groups, DI3TCz exhibited...

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Detalles Bibliográficos
Autores principales: Liu, Yongtao, Sun, Yanna, Li, Miaomiao, Feng, Huanran, Ni, Wang, Zhang, Hongtao, Wan, Xiangjian, Chen, Yongsheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9077748/
https://www.ncbi.nlm.nih.gov/pubmed/35539552
http://dx.doi.org/10.1039/c7ra10387e
Descripción
Sumario:In this study, a new acceptor–donor–acceptor (A–D–A) small molecule, DI3TCz, with carbazole as the central unit and 1,3-indanedione as the end group, was designed and synthesized for application in organic solar cells. In contrast to the molecule DR3TCz with rhodanine as end groups, DI3TCz exhibited deep a LUMO energy level and a nearly unchanged HOMO energy level with a narrow optical band gap of 1.75 eV and red shifted absorption. Compared with DR3TCz, the DI3TCz device showed a PCE of 6.46% with a remaining high V(oc) value of 0.97 V, improved J(sc) of 10.40 mA cm(−1) and a notable FF of 0.65, which is the highest PCE value reported to data for carbazole-based small molecules OPVs.

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