Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
Publication date: 30th March 2023
Ternary organic solar cells are a leading-up idea in organic photovoltaics. In ternary photovoltaic cells, an extra donor or acceptor is added to the standard bulk heterojunction. This sort of doping is designed to improve efficiency by expanding the absorption spectrum of the active layer and increasing junction conductivity. The fundamental categorization of ternary cells is based on the role of the additive. Ternary solar cells are classified into two types: donor1:donor2:acceptor (D1:D2:A) and donor1:acceptor1:acceptor2 (D: A1:A2) .
The aim of this work is to investigate the influence of various small-molecule dopants on the thermo-optical characteristics of ternary layers for application in ternary organic cells.
Reference means poly (3-hexylthiophene-2,5 days) (P3HT) and 6,6 -phenyl C71 butyric acid methyl ester (PC71BM)), and reference doped by selected compounds thin layers were studied. Temperature changes were carried out from 10 oC to 110 oC. The effect of layer annealing on the absorption spectrum was analyzed using UV-Vis spectroscopy. The surface morphology and changes in structure were determined using atomic force microscopy for the layers before and after annealing.
Changes in the dispersion of the refractive index and extinction coefficient were analyzed. These studies and the analysis of changes in the thickness of the layers were carried out in situ using the spectroscopic ellipsometry method.
The investigation will determine the impact of temperature changes on the three-component nanolayers.
Considering devices should work in a variety of environmental conditions. It is essential to define the active layers properties over the large temperature range.
"Research project supported by program „Excellence initiative – research university" for the AGH University of Science and Technology”
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