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Contribution from a hole-conducting dye to the photocurrent in solid-state dye-sensitized solar cells
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Chemical Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science, Chemical Physics.
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2011 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 13, no 45, 20172-20177 p.Article in journal (Refereed) Published
Abstract [en]

The hole transporting medium in solid-state dye-sensitized solar cells can be utilized to harvest sunlight. Herein we demonstrate that a triphenylamine-based dye, used as hole-transporting medium, contributes to the photocurrent in a squaraine-sensitized solid-state dye-sensitized solar cell. Steady-state photoluminescence measurements have been used to distinguish between electron transfer and energy transfer processes leading to energy conversion upon light absorption in the hole-transporting dye.

Place, publisher, year, edition, pages
2011. Vol. 13, no 45, 20172-20177 p.
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-163256DOI: 10.1039/c1cp22493jISI: 000296871500019OAI: oai:DiVA.org:uu-163256DiVA: diva2:464398
Available from: 2011-12-13 Created: 2011-12-09 Last updated: 2017-12-08Bibliographically approved
In thesis
1. XDSC: Excitonic Dye Solar Cells
Open this publication in new window or tab >>XDSC: Excitonic Dye Solar Cells
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Solar energy is the foremost power source of our planet. Driving photosynthesis on our planet for 3 billion years the energy stored in the form of fossil fuels also originates from the sun. Consumption of fossil fuels to generate energy is accompanied with CO2 emission which affects the earth's climate in a serious manner.

Therefore, alternative ways of converting energy have to be found. Solar cells convert sunlight directly into electricity and are therefore an important technology for future electricity generation.

In this work solar cells based on the inorganic semiconductor titanium dioxide and hole-transporting dyes are investigated. These type of solar cells are categorized as hybrid solar cells and are conceptually related to both dye-sensitized solar cells and organic solar cells. Light absorption in the bulk of the hole-transporting dye layer leads to the formation of excitons that can be harvested at the organic/inorganic interface. Two design approaches were investigated: 1) utilizing a multilayer of a hole-transporting dye and 2) utilizing a hole-transporting dye as light harvesting antenna to another dye which is bound to the titanium dioxide surface. 

Using a multiple dye layer in titanium dioxide/hole transporting dye devices, leads to an improved device performance as light harvested in the consecutive dye layers can contribute to the photocurrent. In devices using both an inteface-bound dye and a hole-transporting dye, excitation energy can be transferred from the hole-transporting dye to the interface dye. 

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2012. 93 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 899
Keyword
hybrid solar cells, energy transfer, dye-sensitized solar cells, TiO2, small-molecular semiconductor, hole-transporting dye
National Category
Physical Chemistry
Research subject
Chemistry with specialization in Physical Chemistry
Identifiers
urn:nbn:se:uu:diva-168608 (URN)978-91-554-8279-4 (ISBN)
Public defence
2012-03-30, Polhemsalen, Ångström laboratoriet, Lägerhyddsvägen 1, Uppsala, 09:55 (English)
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Available from: 2012-03-09 Created: 2012-02-13 Last updated: 2012-03-29Bibliographically approved

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Unger, Eva L.Morandeira, AnaZietz, BurkhardHagfeldt, AndersBoschloo, Gerrit

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