Vinylene and benzo[c][1,2,5]thiadiazole: effect of the π-spacer unit on the properties of bis(2-oxoindolin-3-ylidene)-benzodifuran-dione containing polymers for n-channel organic field-effect transistors
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Patil, Basanagouda B
Singh, Samarendra P
Yambem, Soniya D
Feron, Krishna
Ostrikov, Kostya Ken
Bell, John M
Sonar, Prashant
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Two polymers based on (3E,7E)-3,7-bis(2-oxoindolin-3-ylidene)benzo[1,2-b:4,5-b′]difuran-2,6(3H,7H)-dione (BIBDF) coupled with (E)-2-(2-(thiophen-2-yl)vinyl)thiophene (TVT) or dithienylbenzothiadiazole (TBT), namely PBIBDF-TVT and PBIBDF-TBT were synthesized via the Stille coupling reaction. The effect of benzothiadiazole or vinylene-π spacer of the copolymers on optical properties, energy levels, electronic device performance and microstructure were studied. It was found that PBIBDF-TBT based OFET devices, annealed at 180 °C, showed better performance with the highest electron mobility of 2.9 × 10-2 cm2 V s-1 whereas PBIBDF-TVT polymer exhibited 5.0 × 10-4 cm2 V s-1. The two orders of magnitude higher electron mobility of PBIBDF-TBT over PBIBDT-TVT is a clear indicator of the better charge transport ability of this polymer semiconductor arising from its higher crystallinity and better donor-acceptor interaction.
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RSC Advances
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8
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68
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© The Author(s) 2018. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0) License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
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Chemical sciences
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Physical Sciences
Chemistry, Multidisciplinary
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Thu, TD; Patil, BB; Singh, SP; Yambem, SD; Feron, K; Ostrikov, KK; Bell, JM; Sonar, P, Vinylene and benzo[c][1,2,5]thiadiazole: effect of the pi-spacer unit on the properties of bis(2-oxoindolin-3-ylidene)-benzodifuran-dione containing polymers for n-channel organic field-effect transistors, RSC Advances, 2018, 8 (68), pp. 38919-38928