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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:48 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Physics and Technology of Alternative Renewable Energy Supplies
Title:
Flexible organic solar cells
Authors:
Ştefan Dragoş Vāntu, Ana Maria Iordache, S.M. Iordache, Ioan Stamatin
Affiliation:
University of Bucharest, Faculty of Physics, 3Nano-SAE Research Center, 405 Atomistilor str., Bucharest-Magurele, 077125.
E-mail
stefan@3nanosae.org
Keywords:
flexible solar cells, dye, wine, rosa canina, Gox, TiO2
Abstract:
The consumption of petroleum resources during this century and raising awareness of environmental change caused by the combustion of fossil fuels determines the nations and public to reconsider the importance of exploring renewable energy sources, such as solar energy. Dye sensitized solar cells (DSSCs) have emerged as an important alternative to conventional silicon solar cells thanks to their fascinating features such as low fabrication cost and relatively good efficiency. In this study a total of 15 flexible solar cells were created and divided in 3 groups; there were 2 two different methods used to fabricate them. In the 1st group there were 5 solar cells created with a simple dye (methylene blue, crystal violet, Quercetin, rosa canina and wine); first, the dye was deposited on the ITO glass via dropcast method; after that PEDOT-PSS was deposited over the dye (direct method of DSSC fabrication) and finally Al was evaporated on the PEDOT-PSS layer and used as a collecting electrode. The 2nd group has also 5 solar cells, but this time the dye was adsorbed onto TiO2 particles and deposited over the PEDOT-PSS (the indirect method of DSSC fabrication). The 3rd group has approximately the same composition only this time a graphene (GOX) support was used as adsorbent for the dye and the formed solutions were deposited on the PEDOT-PSS. The three groups were analyzed by electrochemical means, UV-VIS spectrophotometry and the I-V characteristics were investigated in a dark environment and during illumination.
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