Dual enhancement of electroluminescence efficiency and operational stability by rapid upconversion of triplet excitons in OLEDs.
Identifieur interne : 000207 ( Main/Exploration ); précédent : 000206; suivant : 000208Dual enhancement of electroluminescence efficiency and operational stability by rapid upconversion of triplet excitons in OLEDs.
Auteurs : Taro Furukawa [Japon] ; Hajime Nakanotani [Japon] ; Munetomo Inoue [Japon] ; Chihaya Adachi [Japon]Source :
- Scientific reports ; 2015.
Abstract
Recently, triplet harvesting via a thermally activated delayed fluorescence (TADF) process has been established as a realistic route for obtaining ultimate internal electroluminescence (EL) quantum efficiency in organic light-emitting diodes (OLEDs). However, the possibility that the rather long transient lifetime of the triplet excited states would reduce operational stability due to an increased chance for unwarranted chemical reactions has been a concern. Herein, we demonstrate dual enhancement of EL efficiency and operational stability in OLEDs by employing a TADF molecule as an assistant dopant and a fluorescent molecule as an end emitter. The proper combination of assistant dopant and emitter molecules realized a "one-way" rapid Förster energy transfer of singlet excitons from TADF molecules to fluorescent emitters, reducing the number of cycles of intersystem crossing (ISC) and reverse ISC in the TADF molecules and resulting in a significant enhancement of operational stability compared to OLEDs with a TADF molecule as the end emitter. In addition, we found that the presence of this rapid energy transfer significantly suppresses singlet-triplet annihilation. Using this finely-tuned rapid triplet-exciton upconversion scheme, OLED performance and lifetime was greatly improved.
DOI: 10.1038/srep08429
PubMed: 25673259
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream PubMed, to step Corpus: 000111
- to stream PubMed, to step Curation: 000111
- to stream PubMed, to step Checkpoint: 000103
- to stream Ncbi, to step Merge: 000D08
- to stream Ncbi, to step Curation: 000D08
- to stream Ncbi, to step Checkpoint: 000D08
- to stream Main, to step Merge: 000204
- to stream Main, to step Curation: 000207
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Dual enhancement of electroluminescence efficiency and operational stability by rapid upconversion of triplet excitons in OLEDs.</title><author><name sortKey="Furukawa, Taro" sort="Furukawa, Taro" uniqKey="Furukawa T" first="Taro" last="Furukawa">Taro Furukawa</name><affiliation wicri:level="1"><nlm:affiliation>Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395</wicri:regionArea><wicri:noRegion>Fukuoka 819-0395</wicri:noRegion></affiliation></author><author><name sortKey="Nakanotani, Hajime" sort="Nakanotani, Hajime" uniqKey="Nakanotani H" first="Hajime" last="Nakanotani">Hajime Nakanotani</name><affiliation wicri:level="1"><nlm:affiliation>1] Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [2] JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>1] Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [2] JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395</wicri:regionArea><wicri:noRegion>Fukuoka 819-0395</wicri:noRegion></affiliation></author><author><name sortKey="Inoue, Munetomo" sort="Inoue, Munetomo" uniqKey="Inoue M" first="Munetomo" last="Inoue">Munetomo Inoue</name><affiliation wicri:level="1"><nlm:affiliation>Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395</wicri:regionArea><wicri:noRegion>Fukuoka 819-0395</wicri:noRegion></affiliation></author><author><name sortKey="Adachi, Chihaya" sort="Adachi, Chihaya" uniqKey="Adachi C" first="Chihaya" last="Adachi">Chihaya Adachi</name><affiliation wicri:level="1"><nlm:affiliation>1] Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [2] JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [3] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>1] Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [2] JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [3] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395</wicri:regionArea><wicri:noRegion>Fukuoka 819-0395</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2015">2015</date><idno type="doi">10.1038/srep08429</idno><idno type="RBID">pubmed:25673259</idno><idno type="pmid">25673259</idno><idno type="wicri:Area/PubMed/Corpus">000111</idno><idno type="wicri:Area/PubMed/Curation">000111</idno><idno type="wicri:Area/PubMed/Checkpoint">000103</idno><idno type="wicri:Area/Ncbi/Merge">000D08</idno><idno type="wicri:Area/Ncbi/Curation">000D08</idno><idno type="wicri:Area/Ncbi/Checkpoint">000D08</idno><idno type="wicri:Area/Main/Merge">000204</idno><idno type="wicri:Area/Main/Curation">000207</idno><idno type="wicri:Area/Main/Exploration">000207</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Dual enhancement of electroluminescence efficiency and operational stability by rapid upconversion of triplet excitons in OLEDs.</title><author><name sortKey="Furukawa, Taro" sort="Furukawa, Taro" uniqKey="Furukawa T" first="Taro" last="Furukawa">Taro Furukawa</name><affiliation wicri:level="1"><nlm:affiliation>Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395</wicri:regionArea><wicri:noRegion>Fukuoka 819-0395</wicri:noRegion></affiliation></author><author><name sortKey="Nakanotani, Hajime" sort="Nakanotani, Hajime" uniqKey="Nakanotani H" first="Hajime" last="Nakanotani">Hajime Nakanotani</name><affiliation wicri:level="1"><nlm:affiliation>1] Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [2] JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>1] Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [2] JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395</wicri:regionArea><wicri:noRegion>Fukuoka 819-0395</wicri:noRegion></affiliation></author><author><name sortKey="Inoue, Munetomo" sort="Inoue, Munetomo" uniqKey="Inoue M" first="Munetomo" last="Inoue">Munetomo Inoue</name><affiliation wicri:level="1"><nlm:affiliation>Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395</wicri:regionArea><wicri:noRegion>Fukuoka 819-0395</wicri:noRegion></affiliation></author><author><name sortKey="Adachi, Chihaya" sort="Adachi, Chihaya" uniqKey="Adachi C" first="Chihaya" last="Adachi">Chihaya Adachi</name><affiliation wicri:level="1"><nlm:affiliation>1] Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [2] JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [3] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>1] Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [2] JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan [3] International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395</wicri:regionArea><wicri:noRegion>Fukuoka 819-0395</wicri:noRegion></affiliation></author></analytic><series><title level="j">Scientific reports</title><idno type="e-ISSN">2045-2322</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Recently, triplet harvesting via a thermally activated delayed fluorescence (TADF) process has been established as a realistic route for obtaining ultimate internal electroluminescence (EL) quantum efficiency in organic light-emitting diodes (OLEDs). However, the possibility that the rather long transient lifetime of the triplet excited states would reduce operational stability due to an increased chance for unwarranted chemical reactions has been a concern. Herein, we demonstrate dual enhancement of EL efficiency and operational stability in OLEDs by employing a TADF molecule as an assistant dopant and a fluorescent molecule as an end emitter. The proper combination of assistant dopant and emitter molecules realized a "one-way" rapid Förster energy transfer of singlet excitons from TADF molecules to fluorescent emitters, reducing the number of cycles of intersystem crossing (ISC) and reverse ISC in the TADF molecules and resulting in a significant enhancement of operational stability compared to OLEDs with a TADF molecule as the end emitter. In addition, we found that the presence of this rapid energy transfer significantly suppresses singlet-triplet annihilation. Using this finely-tuned rapid triplet-exciton upconversion scheme, OLED performance and lifetime was greatly improved.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><country name="Japon"><noRegion><name sortKey="Furukawa, Taro" sort="Furukawa, Taro" uniqKey="Furukawa T" first="Taro" last="Furukawa">Taro Furukawa</name></noRegion><name sortKey="Adachi, Chihaya" sort="Adachi, Chihaya" uniqKey="Adachi C" first="Chihaya" last="Adachi">Chihaya Adachi</name><name sortKey="Inoue, Munetomo" sort="Inoue, Munetomo" uniqKey="Inoue M" first="Munetomo" last="Inoue">Munetomo Inoue</name><name sortKey="Nakanotani, Hajime" sort="Nakanotani, Hajime" uniqKey="Nakanotani H" first="Hajime" last="Nakanotani">Hajime Nakanotani</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Musique/explor/OperaV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000207 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000207 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Musique
|area= OperaV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= pubmed:25673259
|texte= Dual enhancement of electroluminescence efficiency and operational stability by rapid upconversion of triplet excitons in OLEDs.
}}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i -Sk "pubmed:25673259" \
| HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd \
| NlmPubMed2Wicri -a OperaV1
| This area was generated with Dilib version V0.6.21. |  |