Solution processable diketopyrrolopyrrole (DPP) cored small molecules with BODIPY end groups as novel donors for organic solar cells

Autor: Diego Cortizo-Lacalle, Calvyn T. Howells, Upendra K. Pandey, Joseph Cameron, Neil J. Findlay, Anto Regis Inigo, Tell Tuttle, Peter J. Skabara, Ifor D. W. Samuel
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Beilstein Journal of Organic Chemistry, Vol 10, Iss 1, Pp 2683-2695 (2014)
Druh dokumentu: article
ISSN: 1860-5397
DOI: 10.3762/bjoc.10.283
Popis: Two novel triads based on a diketopyrrolopyrrole (DPP) central core and two 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) units attached by thiophene rings have been synthesised having high molar extinction coefficients. These triads were characterised and used as donor materials in small molecule, solution processable organic solar cells. Both triads were blended with PC71BM as an acceptor in different ratios by wt % and their photovoltaic properties were studied. For both the triads a modest photovoltaic performance was observed, having an efficiency of 0.65%. Moreover, in order to understand the ground and excited state properties and vertical absorption profile of DPP and BODIPY units within the triads, theoretical DFT and TDDFT calculations were performed.
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