Blue organic electrophosphorescence diodes using diarylamino-substituted heterocyclic compounds as host material

Soo Son Kyung; Masayuki Yahiro; Toshiro Imai; Hiroki Yoshizaki; Chihaya Adachi

doi:10.2494/photopolymer.20.47

Blue organic electrophosphorescence diodes using diarylamino-substituted heterocyclic compounds as host material

Soo Son Kyung
, Masayuki Yahiro
, Toshiro Imai
, Hiroki Yoshizaki
, Chihaya Adachi

Functional Materials Chemistry

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

20 Citations (Scopus)

Abstract

Diarylamino-substituted heterocyclic compounds (DHCs), 2,6-dicarbazolo-1,5- pyridine (PYD2) and 2,4,6-tricarbazolo-1,3,5-pyrimidine (PYM3), possess a high triplet energy level (T₁) of T₁= 2.93 eV (PYD2) and T ₁= 2.89 eV (PYM3), respectively, in their solid state films. 6wt%-Iridium(III)bis[(4,6-di-fluorophenyl)-pyridinato-N,C²] picolinate (FIrpic):PYD2- and 6wt%-FIrpic:PYM3-doped films showed high photoluminescence (PL) efficiencies of Φ_PL= 88±2 % and Φ_PL=80±1 %, indicating near perfect confinement of FIrpic triplet excitons. By increasing the FIrpic concentration in DHC hosts, lower driving voltage and higher external electroluminescence (EL) quantum efficiencies (η_EL) were observed, indicating enhancement of electron injection and transport (electron current) in these emitting layers.

Original language	English
Pages (from-to)	47-51
Number of pages	5
Journal	Journal of Photopolymer Science and Technology
Volume	20
Issue number	1
DOIs	https://doi.org/10.2494/photopolymer.20.47
Publication status	Published - 2007

All Science Journal Classification (ASJC) codes

Polymers and Plastics
Organic Chemistry
Materials Chemistry

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10.2494/photopolymer.20.47

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@article{c0ab464193594a0a8eae1943dc4863a3,

title = "Blue organic electrophosphorescence diodes using diarylamino-substituted heterocyclic compounds as host material",

abstract = "Diarylamino-substituted heterocyclic compounds (DHCs), 2,6-dicarbazolo-1,5- pyridine (PYD2) and 2,4,6-tricarbazolo-1,3,5-pyrimidine (PYM3), possess a high triplet energy level (T1) of T1= 2.93 eV (PYD2) and T 1= 2.89 eV (PYM3), respectively, in their solid state films. 6wt\%-Iridium(III)bis[(4,6-di-fluorophenyl)-pyridinato-N,C2] picolinate (FIrpic):PYD2- and 6wt\%-FIrpic:PYM3-doped films showed high photoluminescence (PL) efficiencies of ΦPL= 88±2 \% and ΦPL=80±1 \%, indicating near perfect confinement of FIrpic triplet excitons. By increasing the FIrpic concentration in DHC hosts, lower driving voltage and higher external electroluminescence (EL) quantum efficiencies (ηEL) were observed, indicating enhancement of electron injection and transport (electron current) in these emitting layers.",

keywords = "Diarylamino-substituted heterocyclic compound, Electrophosphorescence, FIrpic",

author = "Kyung, \{Soo Son\} and Masayuki Yahiro and Toshiro Imai and Hiroki Yoshizaki and Chihaya Adachi",

year = "2007",

doi = "10.2494/photopolymer.20.47",

language = "English",

volume = "20",

pages = "47--51",

journal = "Journal of Photopolymer Science and Technology",

issn = "0914-9244",

publisher = "Tokai University",

number = "1",

}

TY - JOUR

T1 - Blue organic electrophosphorescence diodes using diarylamino-substituted heterocyclic compounds as host material

AU - Kyung, Soo Son

AU - Yahiro, Masayuki

AU - Imai, Toshiro

AU - Yoshizaki, Hiroki

AU - Adachi, Chihaya

PY - 2007

Y1 - 2007

N2 - Diarylamino-substituted heterocyclic compounds (DHCs), 2,6-dicarbazolo-1,5- pyridine (PYD2) and 2,4,6-tricarbazolo-1,3,5-pyrimidine (PYM3), possess a high triplet energy level (T1) of T1= 2.93 eV (PYD2) and T 1= 2.89 eV (PYM3), respectively, in their solid state films. 6wt%-Iridium(III)bis[(4,6-di-fluorophenyl)-pyridinato-N,C2] picolinate (FIrpic):PYD2- and 6wt%-FIrpic:PYM3-doped films showed high photoluminescence (PL) efficiencies of ΦPL= 88±2 % and ΦPL=80±1 %, indicating near perfect confinement of FIrpic triplet excitons. By increasing the FIrpic concentration in DHC hosts, lower driving voltage and higher external electroluminescence (EL) quantum efficiencies (ηEL) were observed, indicating enhancement of electron injection and transport (electron current) in these emitting layers.

AB - Diarylamino-substituted heterocyclic compounds (DHCs), 2,6-dicarbazolo-1,5- pyridine (PYD2) and 2,4,6-tricarbazolo-1,3,5-pyrimidine (PYM3), possess a high triplet energy level (T1) of T1= 2.93 eV (PYD2) and T 1= 2.89 eV (PYM3), respectively, in their solid state films. 6wt%-Iridium(III)bis[(4,6-di-fluorophenyl)-pyridinato-N,C2] picolinate (FIrpic):PYD2- and 6wt%-FIrpic:PYM3-doped films showed high photoluminescence (PL) efficiencies of ΦPL= 88±2 % and ΦPL=80±1 %, indicating near perfect confinement of FIrpic triplet excitons. By increasing the FIrpic concentration in DHC hosts, lower driving voltage and higher external electroluminescence (EL) quantum efficiencies (ηEL) were observed, indicating enhancement of electron injection and transport (electron current) in these emitting layers.

KW - Diarylamino-substituted heterocyclic compound

KW - Electrophosphorescence

KW - FIrpic

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UR - https://www.scopus.com/pages/publications/34548392698#tab=citedBy

U2 - 10.2494/photopolymer.20.47

DO - 10.2494/photopolymer.20.47

M3 - Article

AN - SCOPUS:34548392698

SN - 0914-9244

VL - 20

SP - 47

EP - 51

JO - Journal of Photopolymer Science and Technology

JF - Journal of Photopolymer Science and Technology

IS - 1

ER -

Blue organic electrophosphorescence diodes using diarylamino-substituted heterocyclic compounds as host material

Abstract

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