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Highly efficient dye-sensitized solar cells based on nitrogen-doped titania with excellent stability

Paper ID Volume ID Publish Year Pages File Format Full-Text
27456 44024 2011 8 PDF Available
Title
Highly efficient dye-sensitized solar cells based on nitrogen-doped titania with excellent stability
Abstract

A series of nitrogen-doped and undoped TiO2 nanocrystals was prepared by several simple methods. Needle-like N-doped TiO2 nanocrystals and nanoparticles were obtained from commercial TiO2 powders. Several dye-sensitized solar cells (DSCs) were fabricated based on N-doped and undoped TiO2 electrodes. The N-doped DSCs achieved a high conversion efficiency of 10.1% and 4.8% using an organic electrolyte and an ionic liquid electrolyte, respectively. Systemic investigations were carried out on the properties of N-doped and undoped TiO2 powders, films, and DSCs. The electron transport time and electron lifetime were investigated by intensity-modulated photocurrent and photovoltage spectroscopy (IMPS/IMVS). Moreover, the electron injection of N-doped DSCs was studied by surface photovoltage spectroscopy (SPS). The synergetic effect of higher dye uptake, faster electron transport and higher photovoltage contributes to a higher conversion efficiency of N-doped DSCs. The stability test also demonstrated that the photodegradation of the DSCs was not accelerated and the DSC system was stabilized by the introduction of nitrogen into the TiO2 photoelectrode. These results indicate that the N-doped TiO2 nanocrystals prepared by our approach from commercial TiO2 are ideal semiconductor materials for DSCs.

Graphical abstractA highly efficient dye-sensitized solar cell (DSC) based on N-doped TiO2 electrode was fabricated, obtaining an energy conversion efficiency of 10.1%. The influences of the N-doped TiO2 on the DSC system were investigated in detail. The N-doped TiO2 nanocrystals simply prepared from commercially available TiO2 are ideal semiconductor materials for DSCs.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
N-doped titania; Dye-sensitized solar cell; Electron transport; Photovoltaic performance
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Highly efficient dye-sensitized solar cells based on nitrogen-doped titania with excellent stability
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 219, Issues 2–3, 15 April 2011, Pages 180–187
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us