Ionic multiresonant thermally activated delayed fluorescence emitters for light emitting electrochemical cells.

Autor: Karaman M; Department of Material Science and Engineering, Faculty of Engineering and Architecture, Izmir Katip, Celebi University, Cigli, 35620-Izmir, Turkey.; Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, UK, KY16 9ST., Kumar Gupta A; Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, UK, KY16 9ST.; Organic Semiconductor Centre, SUPA School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UK., Madayanad Suresh S; Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, UK, KY16 9ST., Matulaitis T; Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, UK, KY16 9ST., Mardegan L; Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático J. Beltrán 2, 46980 Paterna (Valencia), Spain., Tordera D; Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático J. Beltrán 2, 46980 Paterna (Valencia), Spain., Bolink HJ; Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático J. Beltrán 2, 46980 Paterna (Valencia), Spain., Wu S; Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, UK, KY16 9ST., Warriner S; School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, UK., Samuel ID; Organic Semiconductor Centre, SUPA School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UK., Zysman-Colman E; Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, UK, KY16 9ST.
Jazyk: angličtina
Zdroj: Beilstein journal of organic chemistry [Beilstein J Org Chem] 2022 Sep 22; Vol. 18, pp. 1311-1321. Date of Electronic Publication: 2022 Sep 22 (Print Publication: 2022).
DOI: 10.3762/bjoc.18.136
Abstrakt: We designed and synthesized two new ionic thermally activated delayed fluorescent (TADF) emitters that are charged analogues of a known multiresonant TADF (MR-TADF) compound, DiKTa . The emission of the charged derivatives is red-shifted compared to the parent compound. For instance, DiKTa-OBuIm emits in the green (λ PL = 499 nm, 1 wt % in mCP) while DiKTa-DPA-OBuIm emits in the red (λ PL = 577 nm, 1 wt % in mCP). In 1 wt % mCP films, both emitters showed good photoluminescence quantum yields of 71% and 61%, and delayed lifetimes of 316.6 μs and 241.7 μs, respectively, for DiKTa-OBuIm and DiKTa-DPA-OBuIm , leading to reverse intersystem crossing rates of 2.85 × 10 3 s -1 and 3.04 × 10 3 s -1 . Light-emitting electrochemical cells were prepared using both DiKTa-OBuIm and DiKTa-DPA-OBuIm as active emitters showing green (λ max = 534 nm) and red (λ max = 656 nm) emission, respectively.
(Copyright © 2022, Karaman et al.)
Databáze: MEDLINE
Externí odkaz: