Thermally-stable 2,3-diphenylated benzotiophene containing host materials for red phosphorescent organic light-emitting diodes

Joon Ho Jeon; Nam Jin Lee; Ji Hoon Lee; Min Chul Suh

doi:10.1016/j.dyepig.2014.06.002

Thermally-stable 2,3-diphenylated benzotiophene containing host materials for red phosphorescent organic light-emitting diodes

Joon Ho Jeon, Nam Jin Lee, Ji Hoon Lee, Min Chul Suh

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

This study reports a series of benzo[b]thiophene (BT) derivatives with good electronic properties as host materials for red phosphorescent organic light-emitting diodes (PHOLEDs). We applied thermally-stable materials for red PHOLEDs which contain BT and carbazole moieties which also provide a good charge transport ability, as well as a good charge confinement effect (T₁ > 2.25 eV). To control the appropriate charge transporting ability, two different structures having one or two carbazole units connected to the single BT moiety were prepared. Using this approach, we found that the material with a single carbazole and a single BT unit showed the best current efficiency and external quantum efficiency (up to 23.6 cd/A and 12.8%, respectively). The results of the experiment also suggest that BT could be used as an electron-transporting unit when utilized with carbazole moiety, although it has previously been utilized as a p-type material.

Original language	English
Pages (from-to)	116-123
Number of pages	8
Journal	Dyes and Pigments
Volume	111
DOIs	https://doi.org/10.1016/j.dyepig.2014.06.002
Publication status	Published - Dec 2014

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2014R1A2A2A01002417 ). Prof. J.-H. Lee was supported by a grant from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Korean Ministry of Education, Science and Technology (Grant No. NRF-2010-0012463 ). We would like to thank Dr. Young Hye Kim (KBSI) for the ESI MS analysis.

Keywords

Benzothiophene
Carbazole
Good charge confinement
Host materials
Red phosphorescent OLED
Thermostable host material

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10.1016/j.dyepig.2014.06.002

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title = "Thermally-stable 2,3-diphenylated benzotiophene containing host materials for red phosphorescent organic light-emitting diodes",

abstract = "This study reports a series of benzo[b]thiophene (BT) derivatives with good electronic properties as host materials for red phosphorescent organic light-emitting diodes (PHOLEDs). We applied thermally-stable materials for red PHOLEDs which contain BT and carbazole moieties which also provide a good charge transport ability, as well as a good charge confinement effect (T1 > 2.25 eV). To control the appropriate charge transporting ability, two different structures having one or two carbazole units connected to the single BT moiety were prepared. Using this approach, we found that the material with a single carbazole and a single BT unit showed the best current efficiency and external quantum efficiency (up to 23.6 cd/A and 12.8%, respectively). The results of the experiment also suggest that BT could be used as an electron-transporting unit when utilized with carbazole moiety, although it has previously been utilized as a p-type material.",

keywords = "Benzothiophene, Carbazole, Good charge confinement, Host materials, Red phosphorescent OLED, Thermostable host material",

author = "Jeon, {Joon Ho} and Lee, {Nam Jin} and Lee, {Ji Hoon} and Suh, {Min Chul}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2014R1A2A2A01002417 ). Prof. J.-H. Lee was supported by a grant from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Korean Ministry of Education, Science and Technology (Grant No. NRF-2010-0012463 ). We would like to thank Dr. Young Hye Kim (KBSI) for the ESI MS analysis.",

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N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2014R1A2A2A01002417 ). Prof. J.-H. Lee was supported by a grant from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Korean Ministry of Education, Science and Technology (Grant No. NRF-2010-0012463 ). We would like to thank Dr. Young Hye Kim (KBSI) for the ESI MS analysis.

PY - 2014/12

Y1 - 2014/12

N2 - This study reports a series of benzo[b]thiophene (BT) derivatives with good electronic properties as host materials for red phosphorescent organic light-emitting diodes (PHOLEDs). We applied thermally-stable materials for red PHOLEDs which contain BT and carbazole moieties which also provide a good charge transport ability, as well as a good charge confinement effect (T1 > 2.25 eV). To control the appropriate charge transporting ability, two different structures having one or two carbazole units connected to the single BT moiety were prepared. Using this approach, we found that the material with a single carbazole and a single BT unit showed the best current efficiency and external quantum efficiency (up to 23.6 cd/A and 12.8%, respectively). The results of the experiment also suggest that BT could be used as an electron-transporting unit when utilized with carbazole moiety, although it has previously been utilized as a p-type material.

AB - This study reports a series of benzo[b]thiophene (BT) derivatives with good electronic properties as host materials for red phosphorescent organic light-emitting diodes (PHOLEDs). We applied thermally-stable materials for red PHOLEDs which contain BT and carbazole moieties which also provide a good charge transport ability, as well as a good charge confinement effect (T1 > 2.25 eV). To control the appropriate charge transporting ability, two different structures having one or two carbazole units connected to the single BT moiety were prepared. Using this approach, we found that the material with a single carbazole and a single BT unit showed the best current efficiency and external quantum efficiency (up to 23.6 cd/A and 12.8%, respectively). The results of the experiment also suggest that BT could be used as an electron-transporting unit when utilized with carbazole moiety, although it has previously been utilized as a p-type material.

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KW - Carbazole

KW - Good charge confinement

KW - Host materials

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KW - Thermostable host material

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Thermally-stable 2,3-diphenylated benzotiophene containing host materials for red phosphorescent organic light-emitting diodes

Abstract

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Keywords

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