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Double layered nanoarchitecture based on anodic TiO2 nanotubes for dye-sensitized solar cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
26771 43976 2014 7 PDF Available
Title
Double layered nanoarchitecture based on anodic TiO2 nanotubes for dye-sensitized solar cells
Abstract

Based on the TiO2 nanotube (TONT) with three different thicknesses (10, 18, 28 μm) prepared by electrochemical anodization, a double layered electrode consisting of TONT and TiO2 nanoparticles (TONPs) with a size of approximately 20 nm was developed. The anodic TONT electrode has been actively investigated due to its beneficial properties such as a favorable electron transport rate and light scattering ability. However, the small specific surface area caused by the large pores and vacant space between 1-D NTs impedes the fabrication of high efficient DSSCs. Hence, the TONP layer with a thickness of 10 μm is additionally deposited on the top surface of the TONT film to offer a sufficient surface area for large dye loading. Compared to a single TONT electrode, the double layered TONT/NP electrodes provide a high short-circuit current density (Jsc) and fill factor (FF) while maintaining a constant open-circuit voltage (Voc), finally disclosing a higher conversion efficiency (η), attributed to the high loading of dye molecules, light scattering ability, low resistance in the photoanode/electrolyte interface, and longer electron lifetimes. In particular, the optimal η was attained with the TONT/NP (18 μm) electrode having a Voc of 0.80 V, a Jsc of 7.80 mA/cm2, a FF of 62.7%, and a η of 3.93%. Incidentally, when using a longer TONT film (28 μm), η decreases steadily due to the fast charge recombination process. A more detailed discussion is included below.

Graphical abstractBased on the TiO2 nanotube (TONT) prepared by electrochemical anodization, a double layered electrode consisting of TONT and TiO2 nanoparticles (TONPs) with a size of approxmately 20 nm was developed.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Double layered electrode; Dye-sensitized solar cells; Light scattering effect; Electrochemical anodization
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Double layered nanoarchitecture based on anodic TiO2 nanotubes for dye-sensitized solar cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 274, 30 January 2014, Pages 20–26
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