Operational stability enhancement in organic light-emitting diodes with ultrathin Liq interlayers.
Identifieur interne : 000025 ( Main/Exploration ); précédent : 000024; suivant : 000026Operational stability enhancement in organic light-emitting diodes with ultrathin Liq interlayers.
Auteurs : Daniel Ping-Kuen Tsang [Japon] ; Chihaya Adachi [Japon]Source :
- Scientific reports ; 2016.
Abstract
Organic light-emitting diodes (OLEDs) under constant current operation suffer from a decrease of luminance accompanied by an increase of driving voltage. We report a way to greatly improve the stability of OLEDs having a green emitter exhibiting thermally activated delayed fluorescence (TADF), (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl) isophthalonitrile (4CzIPN), by introducing ultrathin (1 to 3 nm) interlayers of 8-hydroxyquinolinato lithium (Liq) between hole-blocking layer and its surrounding emissive and electron-transport layers. Under constant current operation starting at a luminescence of 1,000 cd/m(2), the time to reach 90% of initial luminance (LT90) increased eight times, resulting in LT90 = 1,380 hours after insertion of the interlayers. Combining this new concept and mixed host system, LT95 was further extended to 1315 hours that is 16 times of reference device. This is the best value reported for TADF-based OLEDs and is comparable to the operational lifetimes of well-established phosphorescence-based OLEDs. Thermally stimulated current measurements showed that the number of deep charge traps was reduced with the insertion of the ultrathin Liq interlayer, indicating that reducing the number of deep traps is important for improving the operational lifetime and that exciton-polaron annihilation may be a source of the device degradation.
DOI: 10.1038/srep22463
PubMed: 26926237
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream PubMed, to step Corpus: 000010
- to stream PubMed, to step Curation: 000010
- to stream PubMed, to step Checkpoint: 000018
- to stream Ncbi, to step Merge: 000E95
- to stream Ncbi, to step Curation: 000E95
- to stream Ncbi, to step Checkpoint: 000E95
- to stream Main, to step Merge: 000025
- to stream Main, to step Curation: 000025
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Operational stability enhancement in organic light-emitting diodes with ultrathin Liq interlayers.</title><author><name sortKey="Tsang, Daniel Ping Kuen" sort="Tsang, Daniel Ping Kuen" uniqKey="Tsang D" first="Daniel Ping-Kuen" last="Tsang">Daniel Ping-Kuen Tsang</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>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></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2016">2016</date><idno type="doi">10.1038/srep22463</idno><idno type="RBID">pubmed:26926237</idno><idno type="pmid">26926237</idno><idno type="wicri:Area/PubMed/Corpus">000010</idno><idno type="wicri:Area/PubMed/Curation">000010</idno><idno type="wicri:Area/PubMed/Checkpoint">000018</idno><idno type="wicri:Area/Ncbi/Merge">000E95</idno><idno type="wicri:Area/Ncbi/Curation">000E95</idno><idno type="wicri:Area/Ncbi/Checkpoint">000E95</idno><idno type="wicri:Area/Main/Merge">000025</idno><idno type="wicri:Area/Main/Curation">000025</idno><idno type="wicri:Area/Main/Exploration">000025</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Operational stability enhancement in organic light-emitting diodes with ultrathin Liq interlayers.</title><author><name sortKey="Tsang, Daniel Ping Kuen" sort="Tsang, Daniel Ping Kuen" uniqKey="Tsang D" first="Daniel Ping-Kuen" last="Tsang">Daniel Ping-Kuen Tsang</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>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></analytic><series><title level="j">Scientific reports</title><idno type="e-ISSN">2045-2322</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Organic light-emitting diodes (OLEDs) under constant current operation suffer from a decrease of luminance accompanied by an increase of driving voltage. We report a way to greatly improve the stability of OLEDs having a green emitter exhibiting thermally activated delayed fluorescence (TADF), (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl) isophthalonitrile (4CzIPN), by introducing ultrathin (1 to 3 nm) interlayers of 8-hydroxyquinolinato lithium (Liq) between hole-blocking layer and its surrounding emissive and electron-transport layers. Under constant current operation starting at a luminescence of 1,000 cd/m(2), the time to reach 90% of initial luminance (LT90) increased eight times, resulting in LT90 = 1,380 hours after insertion of the interlayers. Combining this new concept and mixed host system, LT95 was further extended to 1315 hours that is 16 times of reference device. This is the best value reported for TADF-based OLEDs and is comparable to the operational lifetimes of well-established phosphorescence-based OLEDs. Thermally stimulated current measurements showed that the number of deep charge traps was reduced with the insertion of the ultrathin Liq interlayer, indicating that reducing the number of deep traps is important for improving the operational lifetime and that exciton-polaron annihilation may be a source of the device degradation.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><country name="Japon"><noRegion><name sortKey="Tsang, Daniel Ping Kuen" sort="Tsang, Daniel Ping Kuen" uniqKey="Tsang D" first="Daniel Ping-Kuen" last="Tsang">Daniel Ping-Kuen Tsang</name></noRegion><name sortKey="Adachi, Chihaya" sort="Adachi, Chihaya" uniqKey="Adachi C" first="Chihaya" last="Adachi">Chihaya Adachi</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 000025 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000025 | 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:26926237
|texte= Operational stability enhancement in organic light-emitting diodes with ultrathin Liq interlayers.
}}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i -Sk "pubmed:26926237" \
| HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd \
| NlmPubMed2Wicri -a OperaV1
| This area was generated with Dilib version V0.6.21. |  |