6533b833fe1ef96bd129c1e0
RESEARCH PRODUCT
PV effect of fullerene/poly(3-hexylthiophene) blend sensitized by phthalocyanine having infrared absorption CT band
Valdis KamparsI. KaulachsP. ShipkovsV. ParraL. GercaModris RozeMāra PlotnieceGalina KashkarovaInta MuzikanteA. MurashovJ. KalnachsG. Shlihtasubject
Spin coatingMaterials sciencebusiness.industryPhotochemistryPolymer solar cellchemistry.chemical_compoundPhotosensitivityPEDOT:PSSchemistryAbsorption bandPhthalocyanineOptoelectronicsQuantum efficiencyCharge carrierbusinessdescription
An attempt was made to extend the photosensitivity spectral range of fullerene/poly(3-hexylthiophene) blend to NIR region by adding extra electron donor — hydroxygallium phthalocyanine (GaOHPc) with a strong and wide intermolecular charge transfer (CT) band around 830 nm. Multilayer cells of ITO/PEDOT: PSS/6 GaOHPc/P3HT: C61(CO2Et)2 have been prepared by spin coating with vacuum evaporated Al or In top electrodes. Significant photosensitivity of the cells was in 370–900 nm spectral range. However charge carrier photogeneration efficiency was 3 times higher for illumination in P3HT absorption band as compared with the GaOHPc CT band at 830 nm. But when GaOHPc was mixed in the blend forming P3HT:C61(CO2Et)2:GaOHPc active layer its CT band shifted to infrared part at 875 nm. At the same time the charge carrier photogeneration efficiency for illumination in GaOHPc CT band increased significantly, exceeding its value for illumination in P3HT absorption band.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-01-01 |