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Bioinspired solar cell design: Organic thiols as rectifying electron transfer bridges in WS2/TiO2 nano solar cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
27838 44045 2013 5 PDF Available
Title
Bioinspired solar cell design: Organic thiols as rectifying electron transfer bridges in WS2/TiO2 nano solar cells
Abstract

Nano solar cell materials cannot sustain imprinted thermodynamic potentials yielding electrical fields for a charge separation. They have, therefore, to rely on kinetic mechanisms for current rectification and energy conversion. It is shown that treatment of WS2 nano-sheet sensitized TiO2-material with organic thiols increases the photocurrent efficiency at least three fold. They bind to the WS2via the thiol sulfur to produce a charged surface state, which converts into an efficient electron transfer bridge in presence of suitable electron donors. These thiol bridges essentially operate in anodic direction. Thus they increase both the photo induced chemical affinity, which is proportional to the photovoltage generated, and the interfacial reaction rate which is proportional to the photocurrent. The results underline the importance of studying unidirectional electron transfer processes for innovative solar cell applications.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Bioinspired WS2/TiO2 nano solar cells treated with organic thiols are presented. ► An increase of the photocurrent efficiency by a factor of three is observed. ► Organic thiol bridges act as rectifying electronic elements. ► Unidirectional electron transfer is important for innovative solar cell applications.

Keywords
Nano solar cells; Thiols; Electron transfer bridges; Kinetically determined solar cells; Quantum dots
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Bioinspired solar cell design: Organic thiols as rectifying electron transfer bridges in WS2/TiO2 nano solar cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 255, 1 March 2013, Pages 36–40
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