Mutual Diffusion of Model Acceptor/Donor Bilayers under Solvent Vapor Annealing as a Novel Route for Organic Solar Cell Fabrication

Dąbczyński, Paweł; Wójtowicz, Gabriela; Rysz, Jakub

doi:10.3390/en15031033

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Mutual Diffusion of Model Acceptor/Donor Bilayers under Solvent Vapor Annealing as a Novel Route for Organic Solar Cell Fabrication

Paweł Dąbczyński

^*,

Gabriela Wójtowicz

and

Jakub Rysz

Faculty of Physics Astronomy and Applied Computer Science, Jagiellonian University, ul. Łojasiewicza 11, 30-348 Kraków, Poland

Authors to whom correspondence should be addressed.

Academic Editor: Adalgisa Sinicropi

Energies 2022, 15(3), 1033; https://doi.org/10.3390/en15031033

Received: 20 December 2021 / Revised: 24 January 2022 / Accepted: 26 January 2022 / Published: 29 January 2022

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Abstract

The fabrication of bulk heterojunction organic solar cells (OSCs) is primarily based on a phase demixing during solution deposition. This spontaneous process is triggered when, as a result of a decrease in the solvent concentration, interactions between donor and acceptor molecules begin to dominate. Herein, we present that interdiffusion of the same molecules is possible when a bilayers of donors and acceptors are exposed to solvent vapor. Poly(3-hexyl thiophene) (P3HT), and poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole) (PCDTBT) were used as donors and two types of fullerene derivatives were used as acceptors: phenyl-C61-butyric acid methyl ester (PC₆₀BM) and phenyl-C71-butyric acid methyl ester (PC₇₀BM), Secondary ion mass spectrometry depth profiling revealed that the interpenetration of donors and acceptors induced by solvent vapor annealing was dependent on solvent vapor and component compatibility. Exposure to chloroform vapor resulted in a complete intermixing of both components. The mutual mixing increased efficiency of inverted solar cells prepared by solvent vapor annealing of model donor/acceptor bilayers. These results provide a new means for mixing incompatible components for the fabrication of organic solar cells. View Full-Text

Keywords: organic solar cells; interdiffusion; solvent vapor annealing

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MDPI and ACS Style

Dąbczyński, P.; Wójtowicz, G.; Rysz, J. Mutual Diffusion of Model Acceptor/Donor Bilayers under Solvent Vapor Annealing as a Novel Route for Organic Solar Cell Fabrication. Energies 2022, 15, 1033. https://doi.org/10.3390/en15031033

AMA Style

Dąbczyński P, Wójtowicz G, Rysz J. Mutual Diffusion of Model Acceptor/Donor Bilayers under Solvent Vapor Annealing as a Novel Route for Organic Solar Cell Fabrication. Energies. 2022; 15(3):1033. https://doi.org/10.3390/en15031033

Chicago/Turabian Style

Dąbczyński, Paweł, Gabriela Wójtowicz, and Jakub Rysz. 2022. "Mutual Diffusion of Model Acceptor/Donor Bilayers under Solvent Vapor Annealing as a Novel Route for Organic Solar Cell Fabrication" Energies 15, no. 3: 1033. https://doi.org/10.3390/en15031033

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Mutual Diffusion of Model Acceptor/Donor Bilayers under Solvent Vapor Annealing as a Novel Route for Organic Solar Cell Fabrication

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