Improvement of the organic solar cells functional parameters

18th International Summer School on Vacuum, Electron and Ion Technologies

Dimov, D.^1 ; Spassova, I.^1 ; Danev, G.^1 ; Zhivkov, I.^1,2 ; Assa, J.^1

'Acad. J. Malinowski Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 109, 1113 Sofia, Bulgaria^1

Faculty of Chemistry, Center for Materials Research, Brno University of Technology, 118 Purkynova, 612 00 Brno, Czech Republic^2

关键词: Active Layer;    Concentration ratio;    Fullerene C60;    Functional parameters;    Higher efficiency;    Interlayer boundaries;    Life-times;    Zinc phthalocyanines;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/514/1/012004/pdf
DOI  :  10.1088/1742-6596/514/1/012004

来源: IOP

【 摘 要 】

By changing the concentration ratio (zinc-phthalocyanine-ZnPhTc:Fullerene- C60from ZnPhTc:C60= 1:0 through ZnPhTc:C60= 1:1, to 1 C60: ZnPhTc = 1:0) in the active layer, as well as the architecture of the organic solar cells (OSC), a substanial increase of their short-circuit current is achieved. We suggest that the blurred interlayer boundaries lead to an enhanced motion of the holes and the electrons to the electrodes-ITO and Al respectively. Regardless of the shorter distances between the places of excitons creation, the excitons have enough «life- time» for diffusion to the suitable places where their decomposition to the charge carriers-holes and electrons, takes place. This is one of the well-known approaches to achieve a higher efficiency of the OSCs. We thus suggest that the possible interactions and processes discussed are obviously essential prerequisites for improving the functional parameters of the OSCs.