6533b7d7fe1ef96bd12678f7
RESEARCH PRODUCT
Anti-recombination organic dyes containing dendritic triphenylamine moieties for high open-circuit voltage of DSSCs
Herbert MeierZafar IqbalJie FanDerong CaoHai ZhangLingyun WangDai-bin Kuangsubject
Materials scienceAbsorption spectroscopybusiness.industryOpen-circuit voltageProcess Chemistry and TechnologyGeneral Chemical EngineeringPhotovoltaic systemEnergy conversion efficiencyTriphenylamineElectrochemistryPhotochemistrychemistry.chemical_compoundDye-sensitized solar cellchemistryOptoelectronicsbusinessCurrent densitydescription
Abstract Three novel sensitizers with dendritic triphenylamine moieties were synthesized and used for dye-sensitized solar cells (DSSCs). Their absorption spectra, electrochemical and photovoltaic properties were extensively investigated. All three DSSCs exhibit high open-circuit voltage over 0.8 V. The photovoltaic results indicate that the dendritic triphenylamine units improve the open-circuit voltage, which is attributed to the retardation of charge recombination, demonstrating that non-planar and larger molecules exert better blocking function. Under standard global AM 1.5 solar conditions, the best performance of the DSSCs exhibits a short-circuit current density of 10.35 mA cm−2, an open-circuit voltage of 0.836 V and a fill factor of 0.68, corresponding to an overall conversion efficiency of 5.87%.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-10-01 | Dyes and Pigments |