NDLI: Branched Electron-Donor Core Effect in D-π-A Star-Shaped Small Molecules on Their Properties and Performance in Single-Component and Bulk-Heterojunction Organic Solar Cells$ ^{†}$

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Branched Electron-Donor Core Effect in D-π-A Star-Shaped Small Molecules on Their Properties and Performance in Single-Component and Bulk-Heterojunction Organic Solar Cells$ ^{†}$

Content Provider	MDPI
Author	Solodukhin, Alexander Luponosov, Yuriy Mannanov, Artur Savchenko, Petr Bakirov, Artem Shcherbina, Maxim Chvalun, Sergei Paraschuk, Dmitry Ponomarenko, Sergey
Copyright Year	2021
Description	Star-shaped donor-acceptor molecules are full of promise for organic photovoltaics and electronics. However, the effect of the branching core on physicochemical properties, charge transport and photovoltaic performance of such donor-acceptor materials in single-component (SC) and bulk heterojunction (BHJ) organic solar cells has not been thoroughly addressed. This work shows the comprehensive investigation of six star-shaped donor-acceptor molecules with terminal hexyldicyanovinyl blocks linked through 2,2′-bithiophene π-conjugated bridge to different electron-donating cores such as the pristine and fused triphenylamine, tris(2-methoxyphenyl)amine, carbazole- and benzotriindole-based units. Variation of the branching core strongly impacts on such important properties as the solubility, highest occupied molecular orbital energy, optical absorption, phase behavior, molecular packing and also on the charge-carrier mobility. The performance of SC or BHJ organic solar cells are comprehensively studied and compared. The results obtained provide insight on how to predict and fine-tune photovoltaic performance as well as properties of donor-acceptor star-shaped molecules for organic solar cells.
Starting Page	3596
e-ISSN	19961073
DOI	10.3390/en14123596
Journal	Energies
Issue Number	12
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2021-06-17
Access Restriction	Open
Subject Keyword	Energies Atomic, Molecular and Chemical Physics Donor-acceptor Small Molecules Star-shaped Molecules Triphenylamine Carbazole Benzotriindole Single-component Organic Solar Cells Bulk-heterojunction Organic Solar Cells
Content Type	Text
Resource Type	Article

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