Vacuum-deposited diphenyl-diketo-pyrrolopyrrole solar cell structures

19th International Summer School on Vacuum, Electron and Ion Technologies

Georgieva, G.^2 ; Dobrikov, G.^2 ; Heinrichova, P.^1 ; Karashanova, D.^3 ; Dimov, D.^3 ; Vala, M.^1 ; Weiter, M.^1 ; Zhivkov, I.^1,3

Materials Research Center, Faculty of Chemistry, Brno University of Technology, 118 Purkynova, Brno

612 00, Czech Republic^1

Department of Microelectronics, Faculty of Electronic Engineering and Technologies, Technical University of Sofia, 8 Kl. Ohridski blvd., Sofia

1756, Bulgaria^2

Acad. J. Malinowski Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 101/109, Sofia

1113, Bulgaria^3

关键词: Active composites;    Diphenyl-diketo-pyrrolopyrrole;    Solar cell parameters;    Solar cell performance;    Solar cell structures;    Solvent annealing;    UV-vis spectroscopy;    Vacuum deposited films;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/700/1/012046/pdf
DOI  :  10.1088/1742-6596/700/1/012046

来源: IOP

【 摘 要 】

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:C60composite 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:C60vacuum-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.