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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:
Physico-chemical investigations on ITO-carbon sandwich structures
Authors:
Alexandra Camelia Joita (1,2), Ana Maria Iordache (2,3), Stefan Marian Iordache (3), Sergiu Nistor (1), Ioan STAMATIN (2,3)
Affiliation:
(1)National Institute of Material Physics, Bucharest – Magurele, 105bis,...
(2) University of Bucharest, Faculty of Physics, Bucharest – Magurele, 405 Atomistilor str., 077125
(3) University of Bucharest, Faculty of Physics, 3Nano-SAE Research Center, 405 Atomistilor Str, 077125, Bucharest-Magurele, Romania.
E-mail
stefan@3nanosae.org
Keywords:
organic solar cells, graphene, graphene oxide, RES, absorbtion band.
Abstract:
From a scientific viewpoint, new flexible solar cells are the result of nanotechnology advances and in particular of nanochemistry. In order to make solar energy a significant contributor to the global energy production, we need to go through a revolutionary process.A conventional solar cell consists of two layers of semiconductor, one positive (p-type) and the other negative (n-type), sandwiched together to form a p-n junction.The present paper presents the results obtained from physical-chemical investigations on direct method fabricated organic solar cells based on graphene and GOx.The multi-layer graphenes were procesed by supercritical fluids method and used for the modification of a transparent conductive electrode ITO.
Electron spin resonance (ESR) investigation of graphene nanoparticles doped and undoped indicates the presence of C-related dangling bond centers, exhibiting paramagnetic features.The results obtained from cyclic voltammetry, I-V measurements and UV-VIS spectrophotometry indicate a low absorption band gap compatible with organic solar cell and show a good integration amoung internationl research.
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