UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2019 Meeting


Section: Solid State Physics and Materials Science


Title:
Study of the physical properties of P3HT:PCBM:SnO2 thin films based photovoltaic structures


Authors:
Alina CALUGAR(1,2), Mihaela FILIPESCU(2), Sorina IFTIMIE(1), Adrian RADU(1), Vlad A. ANTOHE(1), Diana COMAN(1), Marilena COLT(1), Marina MANICA(1), Maria DINESCU(2), Stefan ANTOHE(1,3)


*
Affiliation:
1)University of Bucharest, Faculty of Physics, 405 Atomistilor, 077125, Magurele, Ilfov, Romania

2)National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, 077125, Magurele, Ilfov, Romania

3)Academy of Romanian Scientists, 54 Splaiul Independentei, 030167, Bucuresti, Romania



E-mail
alina.calugar@inflpr.ro


Keywords:
P3HT, PCBM, SnO2, photovoltaic structures


Abstract:
The design of an efficient organic photovoltaic cells consists of a donor material and an acceptor one, stack between two electrodes, either as bulk-heterojunction or layer-by-layer configuration. Frequently, as donor material is used a conjugated polymer, poly(3-hexylthiophene) – P3HT, while as acceptor a fullerene derivative, phenyl-C71-butyric acid methyl ester – PC71BM, is preferred. Despite the relatively good power conversion efficiency measured in laboratory conditions, for this kind of devices important challenges are still to be overcome, such as: time stability and production cost. To do these, a lot of effort was been done by scientific community using different methods. In this context, this study proposes the analysis of morphological, optical and electrical properties of P3HT:PCBM mixed with tin oxide (SnO2) nanoparticles thin films based photovoltaic devices. The ratio between the constitutive of active layers was P3HT:PCBM:SnO2 (1:1:0.05). The atomic force microscopy investigations showed a relatively uniform distribution of SnO2 nanoparticles into the P3HT:PCBM network. The specific parameters of photovoltaic devices, such as short-circuit current, open circuit voltage, external quantum efficiency, and fill factor, were evaluated and the obtained results were discussed in terms of the bulkjeterojunction cells based on the P3HT:PCBM (1:1) polymeric blend.


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Acknowledgement:
This work was financially supported by The Romanian National Authority for Scientific Research, UEFISCDI, Project No. 40PCCDI/2018.