Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix

The photoluminescence properties of a thermally activated delayed fluorescence emitter, 1,2-bis(carbazol-9-yl)-4,5-dicyanobenzene (2CzPN), doped in a host matrix consisting of 1,3-bis(9-carbazolyl)benzene and a polar inert molecule, camphoric anhydride (CA), in various concentrations have been inves...

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Autores principales: Haseyama, Shota, Niwa, Akitsugu, Kobayashi, Takashi, Nagase, Takashi, Goushi, Kenichi, Adachi, Chihaya, Naito, Hiroyoshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2017
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5388663/
https://www.ncbi.nlm.nih.gov/pubmed/28403583
http://dx.doi.org/10.1186/s11671-017-2012-1
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author Haseyama, Shota
Niwa, Akitsugu
Kobayashi, Takashi
Nagase, Takashi
Goushi, Kenichi
Adachi, Chihaya
Naito, Hiroyoshi
author_facet Haseyama, Shota
Niwa, Akitsugu
Kobayashi, Takashi
Nagase, Takashi
Goushi, Kenichi
Adachi, Chihaya
Naito, Hiroyoshi
author_sort Haseyama, Shota
collection PubMed
description The photoluminescence properties of a thermally activated delayed fluorescence emitter, 1,2-bis(carbazol-9-yl)-4,5-dicyanobenzene (2CzPN), doped in a host matrix consisting of 1,3-bis(9-carbazolyl)benzene and a polar inert molecule, camphoric anhydride (CA), in various concentrations have been investigated. It is found that the addition of CA stabilizes only the lowest singlet excited state (S(1)) of 2CzPN without changing the energy level of the lowest triplet excited state (T(1)), leading to a reduction in the energy gap between S(1) and T(1). The maximum reduction of energy gap achieved in this work has been determined to be around 65 meV from the shift of the fluorescence spectrum and the temperature dependence of the photoluminescence decay rate.
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spelling pubmed-53886632017-04-27 Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix Haseyama, Shota Niwa, Akitsugu Kobayashi, Takashi Nagase, Takashi Goushi, Kenichi Adachi, Chihaya Naito, Hiroyoshi Nanoscale Res Lett Nano Express The photoluminescence properties of a thermally activated delayed fluorescence emitter, 1,2-bis(carbazol-9-yl)-4,5-dicyanobenzene (2CzPN), doped in a host matrix consisting of 1,3-bis(9-carbazolyl)benzene and a polar inert molecule, camphoric anhydride (CA), in various concentrations have been investigated. It is found that the addition of CA stabilizes only the lowest singlet excited state (S(1)) of 2CzPN without changing the energy level of the lowest triplet excited state (T(1)), leading to a reduction in the energy gap between S(1) and T(1). The maximum reduction of energy gap achieved in this work has been determined to be around 65 meV from the shift of the fluorescence spectrum and the temperature dependence of the photoluminescence decay rate. Springer US 2017-04-11 /pmc/articles/PMC5388663/ /pubmed/28403583 http://dx.doi.org/10.1186/s11671-017-2012-1 Text en © The Author(s). 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Haseyama, Shota
Niwa, Akitsugu
Kobayashi, Takashi
Nagase, Takashi
Goushi, Kenichi
Adachi, Chihaya
Naito, Hiroyoshi
Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix
title Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix
title_full Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix
title_fullStr Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix
title_full_unstemmed Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix
title_short Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix
title_sort control of the singlet–triplet energy gap in a thermally activated delayed fluorescence emitter by using a polar host matrix
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5388663/
https://www.ncbi.nlm.nih.gov/pubmed/28403583
http://dx.doi.org/10.1186/s11671-017-2012-1
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