All-Small-Molecule Organic Solar Cells Based on a Fluorinated Small Molecule Donor With High Open-Circuit Voltage of 1.07 V

A new small molecule donor with an acceptor-donor-acceptor (A-D-A) structure, namely DRTB-FT, has been designed and synthesized for all-small-molecule organic solar cells (ASM-OSCs). By introducing fluorine atoms on the thienyl substituent of the central benzodithiophene unit, DRTB-FT shows a low-ly...

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Detalles Bibliográficos
Autores principales: Liu, Chunyan, Qiu, Nailiang, Sun, Yanna, Ke, Xin, Zhang, Hongtao, Li, Chenxi, Wan, Xiangjian, Chen, Yongsheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7198867/
https://www.ncbi.nlm.nih.gov/pubmed/32411669
http://dx.doi.org/10.3389/fchem.2020.00329
Descripción
Sumario:A new small molecule donor with an acceptor-donor-acceptor (A-D-A) structure, namely DRTB-FT, has been designed and synthesized for all-small-molecule organic solar cells (ASM-OSCs). By introducing fluorine atoms on the thienyl substituent of the central benzodithiophene unit, DRTB-FT shows a low-lying highest occupied molecular orbital (HOMO) energy level of −5.64 eV. Blending with an A-D-A type acceptor F-2Cl, DRTB-FT based ASM-OSCs gave a power conversion efficiency (PCE) of 7.66% with a high open-circuit voltage (V(oc)) of 1.070 V and a low energy loss of 0.47 eV. The results indicate that high V(oc) of ASM-OSC devices can be obtained through careful donor molecular optimization.

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