UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-22 1:55
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Conference: Bucharest University Faculty of Physics 2011 Meeting


Section: Solid State Physics and Materials Science


Title:
The influence of ZnO nanoparticles adding on the photoelectrical performances of flexible solar cellls based on P3HT:PCBM(1:1) polymer blends


Authors:
Sorina Iftimie(1), Veta Ghenescu(1,3), Cristina Besleaga(1), A. Radu(1), Simona Craciun(1), A. Majkic(2), C. Tazlaoanu(1), L. Ion(1), G. Bratina(2), S. Antohe(1)


Affiliation:
1) University of Bucharest, Faculty of Physics, 405 Atomistilor Street, PO Box MG-11, 077125, Magurele-Ilfov, Romania

2) University of Nova Gorica, Vipavska 13, POB 301 SI-5000 Nova Gorica, Slovenia

3) Institute for Space Sciences, 409 Atomistilor Street, PO Box MG-23, 077125,

Magurele-Ilfov, Romania


E-mail


Keywords:
Keywords: organic photovoltaic cells, ZnO nanoparticles, P3HT, PCBM, bulk heterojunction


Abstract:
Organic solar cells were prepared by spin-coating technique on PET substrates covered with a thin layer of ITO. The goal of this study is to identify the effects of ZnO nanoparticles mixing in PEDOT layer and to compare the photovoltaic properties with those obtained for “conventional” PET/ITO/P3HT:PCBM(1:1)/Al devices. PET/ITO/P3HT:PCBM(1:1)/Al, PET/ITO/PEDOT + ZnO nanoparticles/P3HT:PCBM (1:1)/Al and PET/ITO/PEDOT + ZnO nanoparticles/P3HT:PCBM(1:1)/LiF/Al structures were analyzed. All the polymeric films were deposited by spin coating method. Composite samples were prepared by adding ZnO nanoparticle into PEDOT solution, followed by ultrasonication to improve the dispersion of ZnO nanoparticles. Two nanometers thick LiF film was deposited by thermal vacuum evaporation. I-V characteristics were measured in dark and under A.M. 1.5 conditions for all as prepared samples and after one month from preparation date. Photoelectrical measurements indicate that the ZnO nanoparticles have a positive influence on the conversion efficiency of prepared samples, reducing the series resistance and improving their stability.