Synthetic approach for the control of self-doping in luminescent organic semiconductors

Synthetic approach for the control of self-doping in luminescent organic semiconductors Full article

Journal

Materials Chemistry Frontiers
ISSN: 2052-1537

Output data

Year: 2022, Volume: 6, Number: 16, Pages: 2244-2255 Pages count : 12 DOI: 10.1039/d2qm00345g

Authors

Kuimov Anatoly D. ¹ , Becker Christina S. ¹ , Shumilov Nikita A. ¹ , Koskin Igor P. ¹ , Sonina Alina A. ^1,2 , Komarov Vladislav Yu. ^2,3 , Shundrina Inna K. ¹ , Kazantsev Maxim S. ¹

Affiliations

1	N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
2	Novosibirsk State University
3	A.V. Nikolaev Institute of Inorganic Chemistry

Funding (1)

Российский Научный Фонд

20-73-10090

Molecular doping of organic luminescent materials is an efficient tool to tune their optoelectronic properties. In particular, self-doping by luminescent longer-conjugation chain chemical by-products is a convenient way to obtain highly emissive organic semiconductors. Although the self-doping approach allows us to avoid the necessity of dopant synthesis, to realize the self-doping and optimize dopant concentration there is a need for a stepwise gradual purification of a material which may be problematic. Here we report a synthetic approach allowing us to control self-doping in luminescent organic semiconductors based on arylene-vinylene co-oligomers. We designed 1,2-bis(5-(4-octylphenyl)thiophen-2-yl)ethene (C8-BPTE) and synthesized it via two pathways yielding batches with different self-dopant concentrations. Our approach does not require a complex purification and excludes a possible degradation of the materials under sublimation or chromatography conditions. The optical properties of C8-BPTE crystals have been demonstrated to be finely tuned by simple mixing of synthesized batches of the material in a desired proportion, the increase of self-doped material content showed an increase in PL QY by up to 1.7 times and caused a red shift of photoluminescence spectra. Moreover, C8-BPTE demonstrated good film-formation ability and the substrate-inclined crystallization showed an efficient way to control crystal lateral size and its orientation on the substrate. C8-BPTE thin-film also demonstrated good p-type charge transport in solution-processed organic field-effect transistors with mobility of up to 0.1 cm2 V−1 s−1.

Kuimov A.D. , Becker C.S. , Shumilov N.A. , Koskin I.P. , Sonina A.A. , Komarov V.Y. , Shundrina I.K. , Kazantsev M.S.
Synthetic approach for the control of self-doping in luminescent organic semiconductors
Materials Chemistry Frontiers. 2022. V.6. N16. P.2244-2255. DOI: 10.1039/d2qm00345g WOS РИНЦ

Submitted:	Apr 18, 2022
Accepted:	Jul 5, 2022
Published online:	Jul 5, 2022

Web of science	WOS:000825697700001
Elibrary	56135687
OpenAlex	W4285221783