Electronic Materials Letters , vol. 4, no. 2, pp.71-74, June, 2008

DOI :

Influence of ZnO Seed Layers on Charge Transport in ZnO Nanorod-based Dye-Sensitized Solar Cells

Jun Hong Noh¹, Sung Hae Lee², Sangwook Lee¹, and Hyun Suk Jung^2,*
1Seoul National University, ²Kookmin University

Abstract : ZnO nanorod array films were deposited on seeded fluorine-doped tin oxide substrates with a chemical bath deposition method, and the dependence of the photovoltaic properties of the films on the annealing temperatures of seed layers was investigated. The energy conversion efficiency of ZnO nanorod-based DSSCs that contained seed layers annealed at 340℃ was superior to that of DSSCs consisting of ZnO nanorods on seed layers annealed at 100℃. Electrochemical impedance spectroscopy revealed that the improved energy conversion efficiency is due to the enhancement in the electron transport within the seed layers.

Keyword : ZnO, nanorod, dye-sensitized solar cell, seed, impedance