Blue Organic Electrophosphorescence Diodes using Diarylamino-substituted Heterocyclic Compounds as Host Material
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- Son Kyung Soo
- Center for Future Chemistry, Kyushu University
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- Yahiro Masayuki
- Center for Future Chemistry, Kyushu University
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- Imai Toshiro
- Department of Photonics Materials Science, Chitose Institute of Science and Technology
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- Yoshizaki Hiroki
- Koei Chemical Co.
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- Adachi Chihaya
- Center for Future Chemistry, Kyushu University
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抄録
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 T1= 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
収録刊行物
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- Journal of Photopolymer Science and Technology
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Journal of Photopolymer Science and Technology 20 (1), 47-51, 2007
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詳細情報 詳細情報について
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- CRID
- 1390282679300842112
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- NII論文ID
- 130004833160
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- NII書誌ID
- AA11576862
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- COI
- 1:CAS:528:DC%2BD2sXot1Wnsb0%3D
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- ISSN
- 13496336
- 09149244
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- NDL書誌ID
- 8918006
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可