Novel organic dye sensitizers containing fluorenyl and biphenyl moieties for solar cells
Three novel triarylamine dyes (AFL1-AFL3) containing fluorenyl and the biphenyl moieties have been designed and synthesized for application in dye-sensitized solar cells. The light-harvesting capabilities and photovoltaic performance of these dyes were investigated systematically through comparison of different π-bridges. The dye with a furan linker exhibited a higher open-circuit voltage (V OC ) and monochromatic incident photon-to-current conversion efficiency (IPCE) compared to thiophene and benzene linker. Thus, AFL3 containing a furan linker exhibited the maximum overall conversion efficiency of 5.81% (V OC =7 760mV,J SC =1 11.36mAcm -2 and ff=0.68) under standard global AM 1.5 G solar condition.
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