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Combining Benzotria...
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Xiong, Wenjing,1989Changzhou University,Chalmers tekniska högskola,Chalmers University of Technology
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Combining Benzotriazole and Benzodithiophene Host Units in Host-Guest Polymers for Efficient and Stable Near-Infrared Emission from Light-Emitting Electrochemical Cells
- Article/chapterEnglish2019
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LIBRIS-ID:oai:research.chalmers.se:2b780178-f670-468a-a4dd-8ea4b1794f15
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https://research.chalmers.se/publication/511832URI
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https://doi.org/10.1002/adom.201900280DOI
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https://research.chalmers.se/publication/512973URI
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-162672URI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
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A set of host-guest copolymers with alternating benzodithiophene and benzotriazole (BTz) derivatives as host units and 4,7-bis(5-bromothiophen-2-yl)-benzo[c][1,2,5]thiadiazole as the minority guest are synthesized, characterized, and evaluated for applications. A light-emitting electrochemical cell (LEC) comprising such a host-guest copolymer delivers fast-response near-infrared (NIR) emission peaked at 723 nm with a high radiance of 169 mu W cm(-2) at a low drive voltage of 3.6 V. The NIR-LEC also features good stability, as the peak NIR output only drops by 8% after 350 h of continuous operation. It is, however, found that the LEC performance is highly sensitive to the detailed chemical structure of the host backbone, and that the addition of electron-donating thiophene bridging units onto the BTz unit is highly positive while the inclusion of fluorine atoms results in a drastically lowered performance, presumably because of the emergence of hydrogen bonding within the active material.
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Tang, ShiUmeå universitet,Institutionen för fysik,Umeå University(Swepub:umu)shta0002
(author)
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Murto, Petri Henrik,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)murto
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Zhu, WeiguoChangzhou University,Xiangtan University
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Edman, Ludvig,1967-Umeå universitet,Institutionen för fysik,Umeå University(Swepub:umu)lued0001
(author)
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Wang, Ergang,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ergang
(author)
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Changzhou UniversityChalmers tekniska högskola
(creator_code:org_t)
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In:Advanced Optical Materials: Wiley7:152195-10712162-7568
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