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Efficient hybrid polymer/titania solar cells sensitized with carboxylated polymer dye

Authors
Journal
Solar Energy Materials and Solar Cells
0927-0248
Publisher
Elsevier
Publication Date
Volume
94
Issue
5
Identifiers
DOI: 10.1016/j.solmat.2009.12.030
Keywords
  • Organic-Inorganic Hybrid Solar Cells
  • Nanocrystalline Titania
  • Poly(3-Hexyl Thiophene)
  • Organic Photovoltaics

Abstract

Abstract A facile method to prepare polymer-TiO 2 hybrid nanocomposite based solar cells has been developed. Here a fabrication method to make the nanocrystalline TiO 2 layer from commercial TiO 2 powder using a simple approach is reported. Active layers were prepared in a thickness range from 0.3 to 1.8 μm with this method. We also demonstrate its use to obtain efficient organic-inorganic hybrid nanocomposite solar cells giving photovoltaic current density as high as 4.5 mA/cm 2 and power conversion efficiency of 0.79%. Commercially available conjugated polymers such as poly[3-(5-carboxypentyl)thiophene-2,5-diyl] (P3HT-COOH) as sensitizer, poly(3-hexylthiophene) (P3HT) as hole conducting layer and conducting poly[3,4-(ethylenedioxy)-thiophene]:poly(styrene sulfonate) (PEDOT:PSS) as charge collection layer have been used. Effect of annealing on the solar cell performance is studied in correlation to the morphology of the nanocomposite as well as absorption in active layers.

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