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Linker Unit Modific...
Linker Unit Modification of Triphenylamine-Based Organic Dyes for Efficient Cobalt Mediated Dye-Sensitized Solar Cells
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- Ellis, Hanna (author)
- Uppsala universitet,Fysikalisk kemi
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- Kaufmann Eriksson, Susanna (author)
- Uppsala universitet,Fysikalisk kemi
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- Feldt, Sandra, 1983- (author)
- Uppsala universitet,Fysikalisk kemi
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- Gabrielsson, Erik (author)
- KTH,Organisk kemi,Molekylär elektronik, CMD,KTH, Organisk kemi
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- Lohse, Peter W. (author)
- Uppsala universitet,Institutionen för kemi - Ångström
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- Lindblad, Rebecka (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Sun, Licheng (author)
- KTH,Organisk kemi,Molekylär elektronik, CMD,KTH, Organisk kemi
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- Rensmo, Håkan (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Boschloo, Gerrit (author)
- Uppsala universitet,Fysikalisk kemi
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- Hagfeldt, Anders (author)
- Uppsala universitet,Fysikalisk kemi
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(creator_code:org_t)
- 2013-10-07
- 2013
- English.
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In: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 117:41, s. 21029-21036
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Linker unit modification of donor-linker-acceptor-based organic dyes was investigated with respect to the spectral and physicochemical properties of the dyes. The spectral response for a series of triphenylamine (TPA)-based organic dyes, called LEG1-4, was shifted into the red wavelength region, and the extinction coefficient of the dyes was increased by introducing different substituted dithiophene units on the pi-conjugated linker. The photovoltaic performance of dye-sensitized solar cells (DSCs) incorporating the different dyes in combination with cobalt-based electrolytes was found to be dependent on dye binding. The binding morphology of the dyes on the TiO2 was studied using photoelectron spectroscopy, which demonstrated that the introduction of alkyl chains and different substituents on the dithiophene linker unit resulted in a larger tilt angle of the dyes with respect to the normal of the TiO2-surface, and thereby a lower surface coverage. The good photovoltaic performance for cobalt electrolyte-based DSCs found here and by other groups using TPA-based organic dyes with a cyclopentadithiophene linker unit substituted with alkyl chains was mainly attributed to the extended spectral response of the dye, whereas the larger tilt angle of the dye with respect to the TiO2-surface resulted in less efficient packing of the dye molecules and enhanced recombination between electrons in TiO2 and Co(III) species in the electrolyte.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- Conjugated linkers
- Dye-Sensitized solar cell
- Extinction coefficients
- Photovoltaic performance
- Physicochemical property
- Spectral response
- Surface coverages
- Wavelength regions
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Ellis, Hanna
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Kaufmann Eriksso ...
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Feldt, Sandra, 1 ...
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Gabrielsson, Eri ...
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Lohse, Peter W.
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Lindblad, Rebeck ...
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show more...
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Sun, Licheng
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Rensmo, Håkan
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Boschloo, Gerrit
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Hagfeldt, Anders
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
- Articles in the publication
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The Journal of P ...
- By the university
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Royal Institute of Technology
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Uppsala University