首页|Perylene bisimides-based molecular dyads with different alkyl linkers for single-component organic solar cells
Perylene bisimides-based molecular dyads with different alkyl linkers for single-component organic solar cells
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NSTL
Elsevier
Two kinds of small molecular dyads (SMDs) based on trithiophene-benzodithiophene-rhodanine (DR3TBDT) main backbone and PBI termini, named SMD2-C6 and SMD2-C12, were designed with different lengths of alkyl linkers (C6H12 and C12H24). The length effect of alkyl linkers on the photovoltaic performance of the two SMDs have been systematically studied. The results show that the length of alkyl linkers can simutaneously tune the energy levels and phase separation in molecular dyad thin films. As a result, a power conversion efficiency of 1.33% was obtained for SMD2-C12 based single-component organic solar cells (SCOSCs), showing higher opencircuit voltage, short-circuit current density, and fill factor than those of SMD2-C6 based devices. Our findings provide a strategy for designing new SMDs and reveal the importance of alkyl linkers' length on the morphology of SMDs toward improved SCOSC performance.
Small molecular dyadsAlkyl linkersCrystallinityPhase separationSingle-component organic solar cellsCONJUGATED BLOCK-COPOLYMERFULLERENEEFFICIENCYPOLYMERPOLYTHIOPHENEPHOTOVOLTAICSSTABILITYHYBRID
NSTL
Elsevier
