J Mater Sci Technol ›› 2006, Vol. 22 ›› Issue (06): 811-816.

• Research Articles • Previous Articles     Next Articles

Polymer Sensitized Quasi Solid-State Photovoltaic Cells Using Derivatives of Polythiophene

G.K.R.Senadeera, J.M.R.C.Fernando   

  1. Institute of Fundamental Studies, Hantane Road, Kandy, Sri Lanka
  • Received:2006-03-13 Revised:2006-05-26 Online:2006-11-28 Published:2009-10-10
  • Contact: G.K.R.Senadeera

Abstract: Substituted thiophene sensitized, nanocrystalline TiO2-based quasi solid-state solar cells were fabricated by using either poly (3-thiophene acetic acid) (P3TAA) or a copolymer with poly (3-thiophene acetic acid)-poly (hexyl thiophene) (P3TAA-PHT) polymers and copper iodide (CuI) as a hole conducting material together with an ionic liquid 1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl) amide and lithium bis (trifluoromethanesulfone) imide as additives for charge transport promotion. Dramatic enhancements in the cell performances were observed with the additives in CuI. While the cell sensitized with P3TAA generated a short-circuit photocurrent of ~1.45 mA•cm-2, an open-circuit photovoltage of ~345 mV with a total power conversion efficiency of ~0.3% under simulated full sunlight of 100 mW•cm-2 (air mass: 1.5), the cell sensitized with copolymer P3TAA-PHT delivered ~0.25% efficiency under the same conditions with ~1.23 mA•cm-2 as photocurrent and ~371 mV as photovoltage.

Key words: Solar cells, Polymers, Titanium dioxide