Understanding the Halogenation Effects in Diketopyrrolopyrrole-Based Small Molecule Photovoltaics.
ACS applied materials & interfaces(2015)
摘要
Two molecules containing a central diketopyrrolopyrrole and two oligothiophene units have been designed and synthesized. Comparisons between the molecules containing terminal F (FDPP) and Cl (CDPP) atoms allowed us to evaluate the effects of halogenation on the photovoltaic properties of the small molecule organic solar cells (OSCs). The OSCs devices employing FDPP:PC71BM films showed power conversion efficiencies up to 4.32%, suggesting that fluorination is an efficient method for constructing small molecules for OSCs.
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关键词
solution-processed small molecules,diketopyrrolopyrrole,organic solar cells,halogenation effect,device optimization
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