Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes

Jae Wook Kang; Deug Sang Lee; Hyung Dol Park; Young Seo Park; Ji Whan Kim; Won Ik Jeong; Kyung Mo Yoo; Kyoungmoon Go; Se Hoon Kim; Jang Joo Kim

doi:10.1039/b705741e

Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes

Jae Wook Kang, Deug Sang Lee, Hyung Dol Park, Young Seo Park, Ji Whan Kim, Won Ik Jeong, Kyung Mo Yoo, Kyoungmoon Go, Se Hoon Kim, Jang Joo Kim

KU-KIST Graduate School of Converging Science and Technology

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

84 Citations (Scopus)

Abstract

One of the important factors for high efficiency phosphorescent organic light-emitting devices is to confine triplet excitons within the emitting layer. We synthesized and characterized a new hole blocking material containing silane and triazine moieties, 2,4-diphenyl-6-(4′-triphenylsilanyl-biphenyl-4-yl) -1,3,5-triazine (DTBT). Electrophosphorescent devices fabricated using the material as the hole-blocking layer and N,N′-dicarbazolyl-4,4′- biphenyl (CBP) doped with fac-tris(2-phenylpyridine)iridium [Ir(ppy) ₃] as the emitting layer showed a maximum external quantum efficiency (η_ext) of 17.5% with a maximum power efficiency (η_p) of 47.8 lm W^-1, which are much higher than those of devices using bathcuproine (BCP) (η_ext = 14.5%, η_p = 40.0 lm W^-1) and 4-biphenyloxolate aluminium(iii) bis(2-methyl-8-quinolinato)-4-phenylphenolate (BAlq) (η_ext = 8.1%, η_p = 14.2 lm W^-1) as hole-blocking layers.

Original language	English
Pages (from-to)	3714-3719
Number of pages	6
Journal	Journal of Materials Chemistry
Volume	17
Issue number	35
DOIs	https://doi.org/10.1039/b705741e
Publication status	Published - 2007

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Chemistry(all)
Materials Chemistry

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title = "Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes",

abstract = "One of the important factors for high efficiency phosphorescent organic light-emitting devices is to confine triplet excitons within the emitting layer. We synthesized and characterized a new hole blocking material containing silane and triazine moieties, 2,4-diphenyl-6-(4′-triphenylsilanyl-biphenyl-4-yl) -1,3,5-triazine (DTBT). Electrophosphorescent devices fabricated using the material as the hole-blocking layer and N,N′-dicarbazolyl-4,4′- biphenyl (CBP) doped with fac-tris(2-phenylpyridine)iridium [Ir(ppy) 3] as the emitting layer showed a maximum external quantum efficiency (ηext) of 17.5% with a maximum power efficiency (ηp) of 47.8 lm W-1, which are much higher than those of devices using bathcuproine (BCP) (ηext = 14.5%, ηp = 40.0 lm W-1) and 4-biphenyloxolate aluminium(iii) bis(2-methyl-8-quinolinato)-4-phenylphenolate (BAlq) (ηext = 8.1%, ηp = 14.2 lm W-1) as hole-blocking layers.",

author = "Kang, {Jae Wook} and Lee, {Deug Sang} and Park, {Hyung Dol} and Park, {Young Seo} and Kim, {Ji Whan} and Jeong, {Won Ik} and Yoo, {Kyung Mo} and Kyoungmoon Go and Kim, {Se Hoon} and Kim, {Jang Joo}",

year = "2007",

doi = "10.1039/b705741e",

language = "English",

volume = "17",

pages = "3714--3719",

journal = "Journal of Materials Chemistry",

issn = "0959-9428",

publisher = "Royal Society of Chemistry",

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T1 - Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes

AU - Kang, Jae Wook

AU - Lee, Deug Sang

AU - Park, Hyung Dol

AU - Park, Young Seo

AU - Kim, Ji Whan

AU - Jeong, Won Ik

AU - Yoo, Kyung Mo

AU - Go, Kyoungmoon

AU - Kim, Se Hoon

AU - Kim, Jang Joo

PY - 2007

Y1 - 2007

N2 - One of the important factors for high efficiency phosphorescent organic light-emitting devices is to confine triplet excitons within the emitting layer. We synthesized and characterized a new hole blocking material containing silane and triazine moieties, 2,4-diphenyl-6-(4′-triphenylsilanyl-biphenyl-4-yl) -1,3,5-triazine (DTBT). Electrophosphorescent devices fabricated using the material as the hole-blocking layer and N,N′-dicarbazolyl-4,4′- biphenyl (CBP) doped with fac-tris(2-phenylpyridine)iridium [Ir(ppy) 3] as the emitting layer showed a maximum external quantum efficiency (ηext) of 17.5% with a maximum power efficiency (ηp) of 47.8 lm W-1, which are much higher than those of devices using bathcuproine (BCP) (ηext = 14.5%, ηp = 40.0 lm W-1) and 4-biphenyloxolate aluminium(iii) bis(2-methyl-8-quinolinato)-4-phenylphenolate (BAlq) (ηext = 8.1%, ηp = 14.2 lm W-1) as hole-blocking layers.

AB - One of the important factors for high efficiency phosphorescent organic light-emitting devices is to confine triplet excitons within the emitting layer. We synthesized and characterized a new hole blocking material containing silane and triazine moieties, 2,4-diphenyl-6-(4′-triphenylsilanyl-biphenyl-4-yl) -1,3,5-triazine (DTBT). Electrophosphorescent devices fabricated using the material as the hole-blocking layer and N,N′-dicarbazolyl-4,4′- biphenyl (CBP) doped with fac-tris(2-phenylpyridine)iridium [Ir(ppy) 3] as the emitting layer showed a maximum external quantum efficiency (ηext) of 17.5% with a maximum power efficiency (ηp) of 47.8 lm W-1, which are much higher than those of devices using bathcuproine (BCP) (ηext = 14.5%, ηp = 40.0 lm W-1) and 4-biphenyloxolate aluminium(iii) bis(2-methyl-8-quinolinato)-4-phenylphenolate (BAlq) (ηext = 8.1%, ηp = 14.2 lm W-1) as hole-blocking layers.

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DO - 10.1039/b705741e

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JO - Journal of Materials Chemistry

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Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes

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