Faculty of Physics - University of Bucharest

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2024-11-22 1:48

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Conference: Bucharest University Faculty of Physics 2011 Meeting

Section: Solid State Physics and Materials Science

Title:

Properties of monomeric organic dyes thin films deposited on flexible substrate for photovoltaic applications

Authors:

Camelia-Florina Florica(1,2), I. Tanase(3), Sorina Iftimie (1), Cristina Besleaga(1), A.Radu(1), Nicoleta Dina(1), M. Dafinei(1), Oana Brancoveanu(1), L. Ion(1), St. Antohe(1)

Affiliation:

1) University of Bucharest, Physics Department, 405 Atomistilor, PO BOX MG-11, 077125, Magurele-Ilfov, Romania

2) National Institute of Material Physics, 405bis Atomistilor, PO BOX MG-7, 077125, Magurele-Ilfov, Romania

3) University of Craiova, Physics Department, 13 A. I. Cuza, 200585 Craiova, Dolj, Romania

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Keywords:

ZnPc, CuPc, TPyP, organic photovoltaics, TCO, flexible photovoltaics(PET)

Abstract:

Solar cells were prepared using thin films of small molecules organic materials (ZnPc, CuPc and TPyP), deposited on optical glass and PET substrates. For improving electrical and photoelectrical behaviour of these structures, in their preparation different TCO layers, such as ITO and/ or doped ZnO, were used. The organic thin films were deposited by thermal vacuum evaporation using as source a quartz container holding the corresponding powder. To finalise the photovoltaic structure a 300 nm Al thin films was deposited on the organic absorber, representing the top contact of the structures. The structural and morphological characterization (XRD, AFM, SEM) of the prepared photoactive thin films was performed. Optical, electrical and photoelectrical properties were investigated for each of the prepared photovoltaic cells and a comparison between their performances has been done. The transport parameters characterizing the depletion region responsible for photovoltaic response were determined, too.