Fabrication and Characterization of Rose Bengal Sensitized Binary TiO2-ZrO2 Oxides Photo-electrode Based Dye-sensitized Solar Cell

M. A. Waghmare 1, 2

N. I. Beedri 2

A. U. Ubale 1, Email

H. M. Pathan 2

1 Nanostructured Thin Film Materials Laboratory, Department of Physics, Govt. Vidarbha Institute of Science and Humanities, Amravati - 444604, India

2 Advanced Physics Laboratory, Department of Physics, Savitribai Phule Pune University, Pune - 411007, India

Abstract

Titanium oxide (TiO2) electrode has been the most commonly used photo-electrode for the dye-sensitized solar cells (DSSCs). Several research groups have reported that only TiO2 layer is not yet ideal for electron transfer in the absence of space charge layer and also demonstrated the procedures for coating nanocrystalline semiconducting oxide films with a thin overcoat of a different semiconducting oxide with a higher conduction band energy level (Ec). Zirconium oxide (ZrO2) is a suitable material for such overcoat because of its higher E2. The binary TiO2–ZrO2 oxide photo-electrodes were prepared by a doctor blading technique. The electrodes were annealed at 450 oC and then sensitized by Rose Bengal (RB) dye. The DSSC fabricated by binary TiO2-ZrO2 photo-electrode showed an improved solar energy conversion efficiency than that fabricated by only pure TiO2.

Fabrication and Characterization of Rose Bengal Sensitized Binary TiO2-ZrO2 Oxides Photo-electrode Based Dye-sensitized Solar Cell