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Article

Studying the Effect of High Substrate Temperature on the Microstructure of Vacuum Evaporated TAPC: C60 Organic Solar Thin Films

1
Faculty of Engineering, Ain Shams University, Cairo P.O. Box 11517, Egypt
2
Department of Physics, University of Oxford, Oxford OX1 3PU, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Ahalapitiya H Jayatissa
Materials 2021, 14(7), 1733; https://doi.org/10.3390/ma14071733
Received: 8 March 2021 / Revised: 24 March 2021 / Accepted: 25 March 2021 / Published: 1 April 2021
(This article belongs to the Section Electronic Materials)
Organic solar cells (OSCs), also known as organic photovoltaics (OPVs), are an emerging solar cell technology composed of carbon-based, organic molecules, which convert energy from the sun into electricity. Key for their performance is the microstructure of the light-absorbing organic bulk heterojunction. To study this, organic solar films composed of both fullerene C60 as electron acceptor and different mole percentages of di-[4-(N,N-di-p-tolyl-amino)-phenyl]-cyclohexane (TAPC) as electron donor were evaporated in vacuum in different mixing ratios (5, 50 and 95 mol%) on an ITO-coated glass substrate held at room temperature and at 110 °C. The microstructure of the C60: TAPC heterojunction was studied by grazing incidence wide angle X-ray scattering to understand the effect of substrate heating. By increasing the substrate temperature from ambient to 110 °C, it was found that no significant change was observed in the crystal size for the C60: TAPC concentrations investigated in this study. In addition to the variation done in the substrate temperature, the variation of the mole percent of the donor (TAPC) was studied to conclude the effect of both the substrate temperature and the donor concentration on the microstructure of the OSC films. Bragg peaks were attributed to C60 in the pure C60 sample and in the blend with low donor mole percentage (5%), but the C60 peaks became nondiscernible when the donor mole percentage was increased to 50% and above, showing that TAPC interrupted the formation of C60 crystals. View Full-Text
Keywords: renewable energy; organic semiconductors; organic solar cells; vacuum evaporation; X-ray diffraction; microstructure renewable energy; organic semiconductors; organic solar cells; vacuum evaporation; X-ray diffraction; microstructure
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MDPI and ACS Style

Abdelaal, M.; Abdellatif, M.H.; Riede, M.; Bassioni, G. Studying the Effect of High Substrate Temperature on the Microstructure of Vacuum Evaporated TAPC: C60 Organic Solar Thin Films. Materials 2021, 14, 1733. https://doi.org/10.3390/ma14071733

AMA Style

Abdelaal M, Abdellatif MH, Riede M, Bassioni G. Studying the Effect of High Substrate Temperature on the Microstructure of Vacuum Evaporated TAPC: C60 Organic Solar Thin Films. Materials. 2021; 14(7):1733. https://doi.org/10.3390/ma14071733

Chicago/Turabian Style

Abdelaal, Mohamed, Mohamed Hazem Abdellatif, Moritz Riede, and Ghada Bassioni. 2021. "Studying the Effect of High Substrate Temperature on the Microstructure of Vacuum Evaporated TAPC: C60 Organic Solar Thin Films" Materials 14, no. 7: 1733. https://doi.org/10.3390/ma14071733

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