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Solid-State Dye-Sensitized Solar Cells using Ordered TiO₂ Nanorods on Transparent Conductive Oxide as Photoanodes

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Mingkui Wang†‡, Jie Bai†, Florian Le Formal‡, Soo-Jin Moon‡, Lê Cevey-Ha‡, Robin Humphry-Baker‡, Carole Grätzel‡, Shaik M. Zakeeruddin*‡, and Michael Grätzel*‡

^† Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, 430074 Wuhan, P. R. China

^‡ Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology, CH 1015 Lausanne, Switzerland

J. Phys. Chem. C, 2012, 116 (5), pp 3266–3273

DOI: 10.1021/jp209130x

Publication Date (Web): January 9, 2012

*E-mail: shaik.zakeer@epfl.ch (S.M.Z.); michael.graetzel@epfl.ch (M.G.).

Section:

Electrochemical, Radiational, and Thermal Energy Technology

Abstract

TiO₂ nanorod arrays were prepared on top of a transparent conductive glass substrate covered with a thin TiO₂ compact layer. Solid-state dye-sensitized solar cells (SSDSCs) were fabricated using these structured TiO₂ films sensitized with C106 dye as a photoanode and 2,2′,7,7′-tetrakis-(N,N-dipmethoxyphenylamine) 9,9′-spirobifluorene (spiro-MeOTAD) as the organic hole-transporting material. Photovoltaic power conversion efficiency of 2.9% was obtained at full sunlight intensity. The electron lifetime as well as the electron diffusion coefficient in the device was determined by charge extraction, transient photovoltage decay, and open-circuit photovoltage decay experiments.

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History

Published In Issue February 09, 2012
Article ASAPJanuary 27, 2012
Just Accepted ManuscriptJanuary 09, 2012
Received: September 21, 2011
Revised: January 06, 2012

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Solid-State Dye-Sensitized Solar Cells using Ordered TiO₂ Nanorods on Transparent Conductive Oxide as Photoanodes