A wet- and dry-process feasible carbazole type host for highly efficient phosphorescent OLEDsElectronic supplementary information (ESI) available. See DOI: 10.1039/c5tc02889b
A wet- and dry-process feasible host material is crucial to realize, respectively, low cost roll-to-roll fabrication of large area and high performance organic light-emitting diodes (OLEDs) with precise deposition of organic layers. We demonstrate in this study high efficiency phosphorescent OLED de...
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Format | Journal Article |
Language | English |
Published |
26.11.2015
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Abstract | A wet- and dry-process feasible host material is crucial to realize, respectively, low cost roll-to-roll fabrication of large area and high performance organic light-emitting diodes (OLEDs) with precise deposition of organic layers. We demonstrate in this study high efficiency phosphorescent OLED devices by employing a newly synthesized carbazole based host material 1,6-bis[3-(2-methoxy-3-pyridinyl)carbazol-9-yl]hexane (compound
5
). Moreover, two other carbazole hosts 1,6-bis[3-(6-methoxy-3-pyridinyl)carbazol-9-yl]hexane (compound
4
) and 3,6-di(2-methoxy-3-pyridinyl)-9-ethylcarbazole (compound
6
) are also synthesized for comparison. By doping a typical green emitter
fac
tris(2-phenylpyridine)iridium (Ir(ppy)
3
) in compound
5
, for example, the resultant wet-processed device exhibits at 100 cd m
−2
a current efficiency of 27 cd A
−1
and a power efficiency of 16.1 lm W
−1
. The dry-processed device shows a current efficiency of 61 cd A
−1
and a power efficiency of 62.8 lm W
−1
. The high efficiency may be attributed to the host possessing an effective host-to-guest energy transfer, effective carrier injection balance, and the device architecture enabling excitons to generate on both the host and the guest.
A wet- and dry-process feasible host material is crucial to realize, respectively, low cost roll-to-roll fabrication of large area and high performance organic light-emitting diodes (OLEDs) with precise deposition of organic layers. |
---|---|
AbstractList | A wet- and dry-process feasible host material is crucial to realize, respectively, low cost roll-to-roll fabrication of large area and high performance organic light-emitting diodes (OLEDs) with precise deposition of organic layers. We demonstrate in this study high efficiency phosphorescent OLED devices by employing a newly synthesized carbazole based host material 1,6-bis[3-(2-methoxy-3-pyridinyl)carbazol-9-yl]hexane (compound
5
). Moreover, two other carbazole hosts 1,6-bis[3-(6-methoxy-3-pyridinyl)carbazol-9-yl]hexane (compound
4
) and 3,6-di(2-methoxy-3-pyridinyl)-9-ethylcarbazole (compound
6
) are also synthesized for comparison. By doping a typical green emitter
fac
tris(2-phenylpyridine)iridium (Ir(ppy)
3
) in compound
5
, for example, the resultant wet-processed device exhibits at 100 cd m
−2
a current efficiency of 27 cd A
−1
and a power efficiency of 16.1 lm W
−1
. The dry-processed device shows a current efficiency of 61 cd A
−1
and a power efficiency of 62.8 lm W
−1
. The high efficiency may be attributed to the host possessing an effective host-to-guest energy transfer, effective carrier injection balance, and the device architecture enabling excitons to generate on both the host and the guest.
A wet- and dry-process feasible host material is crucial to realize, respectively, low cost roll-to-roll fabrication of large area and high performance organic light-emitting diodes (OLEDs) with precise deposition of organic layers. |
Author | Volyniuk, Dmytro Grazulevicius, Juozas Vidas Singh, Meenu Yu, Hui-Huan Kumar, Sudhir Grigalevicius, Saulius Fang, Po-Hsun Sahoo, Snehasis Krucaite, Gintare Jou, Jwo-Huei |
AuthorAffiliation | ETH Zürich Kaunas University of Technology Department of Polymer Chemistry and Technology Institute for Chemical and Bioengineering National Tsing-Hua University Department of Materials Science and Engineering |
AuthorAffiliation_xml | – name: Institute for Chemical and Bioengineering – name: National Tsing-Hua University – name: Kaunas University of Technology – name: ETH Zürich – name: Department of Polymer Chemistry and Technology – name: Department of Materials Science and Engineering |
Author_xml | – sequence: 1 givenname: Jwo-Huei surname: Jou fullname: Jou, Jwo-Huei – sequence: 2 givenname: Snehasis surname: Sahoo fullname: Sahoo, Snehasis – sequence: 3 givenname: Sudhir surname: Kumar fullname: Kumar, Sudhir – sequence: 4 givenname: Hui-Huan surname: Yu fullname: Yu, Hui-Huan – sequence: 5 givenname: Po-Hsun surname: Fang fullname: Fang, Po-Hsun – sequence: 6 givenname: Meenu surname: Singh fullname: Singh, Meenu – sequence: 7 givenname: Gintare surname: Krucaite fullname: Krucaite, Gintare – sequence: 8 givenname: Dmytro surname: Volyniuk fullname: Volyniuk, Dmytro – sequence: 9 givenname: Juozas Vidas surname: Grazulevicius fullname: Grazulevicius, Juozas Vidas – sequence: 10 givenname: Saulius surname: Grigalevicius fullname: Grigalevicius, Saulius |
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References_xml | – issn: 2008 end-page: 221 publication-title: Highly efficient OLEDs with phosphorescent materials doi: Hui Jaiser Neher – issn: 2010 end-page: 71 publication-title: Organic electronics: materials, processing, devices and applications doi: Tse Cheung So |
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