Vacuum-deposited diphenyl-diketo-pyrrolopyrrole solar cell structures

Photoelectrical parameters were measured of solar cell ITO|PEDOT:PSS|composite| Al samples. The active composite film was deposited in vacuum by co-evaporation of 3,6-bis(5-(benzofuran-2-yl)thiophen-2-yl)-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (DPP(TBFu)2) and fullerene (C60). A...

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Published inJournal of physics. Conference series Vol. 700; no. 1; pp. 12046 - 12050
Main Authors Georgieva, G, Dobrikov, G, Heinrichova, P, Karashanova, D, Dimov, D, Vala, M, Weiter, M, Zhivkov, I
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2016
Subjects
Buckminsterfullerene
Electromagnetic absorption
Fullerenes
Parameters
Photoelectricity
Photovoltaic cells
Physics
Scanning electron microscopy
Solar cells
Spectrum analysis
Tetrahydrofuran
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Summary:Photoelectrical parameters were measured of solar cell ITO|PEDOT:PSS|composite| Al samples. The active composite film was deposited in vacuum by co-evaporation of 3,6-bis(5-(benzofuran-2-yl)thiophen-2-yl)-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (DPP(TBFu)2) and fullerene (C60). Additional DPP(TBFu)2:C60 composite films were studied by spectroscopy in the ultraviolet and visible region (UV-VIS) and scanning electron microscopy (SEM). It was found that solvent annealing (SVA) of composite DPP(TBFu)2:C60 vacuum-deposited films with tetrahydrofuran vapors improves the solar cell parameters by increasing the efficiency more than tenfold. This could be related to the more homogenized structure of the SVA composite film, as observed by SEM. The increased light absorption, as shown by UV-VIS spectroscopy, around the peak at 350 nm contributed to the better SVA solar cell performance. Photogeneration in the samples follows a monomolecular mechanism.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/700/1/012046