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Introducing ethynylene linkages in a conjugated molecule can deepen the HOMO level, decrease the steric constraints and better delocalize the π electrons and so on, which are beneficial for organic solar cells. Furthermore, the typical method of introducing acetylene linkages by Sonogashira reactions can avoid the usage of toxic stannyl intermediates and potentially dangerous lithiation reactions...
The cover picture shows that two simple small molecules BEDPP and NEDPP were designed and synthesized via Sonogashira reaction. The typical method of introducing acetylene linkages by Sonogashira reactions can avoid the usage of toxic stannyl intermediates and potentially dangerous lithiation reactions. The solution‐processed BHJ OSCs based on BEDPP and NEDPP exhibit PCEs of 1.48% and 2.31% with very...
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