Twisted Intramolecular Charge Transfer State for Long-Wavelength Thermally Activated Delayed Fluorescence

被引：297

作者：

Tanaka, Hiroyuki ^{[1
]}

Shizu, Katsuyuki ^{[1
]}

Nakanotani, Hajime ^{[1
,2
]}

Adachi, Chihaya ^{[1
,2
,3
]}

机构：

[1] Kyushu Univ, Ctr Organ Photon & Elect Res OPERA, Nishi Ku, Fukuoka 8190395, Japan

[2] Inst Syst Informat Technol & Nanotechnol ISIT, Innovat Organ Device Lab, Nishi Ku, Fukuoka 8190395, Japan

[3] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, Fukuoka 8190395, Japan

来源：

CHEMISTRY OF MATERIALS | 2013年 / 25卷 / 18期

关键词：

organic light-emitting diodes; thermally activated delayed fluorescence; emission wavelength tuning; intramolecular charge transfer; LIGHT-EMITTING-DIODES; DYES; APPROXIMATION; COMPLEXES; EMISSION;

D O I：

10.1021/cm402428a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Emission wavelength tuning of thermally activated delayed fluorescence from green to orange in solid state films is demonstrated. Emission tuning occurs by stabilization of the intramolecular charge transfer state between a phenoxazine (PXZ) donor unit and 2,4,6-triphenyl-1,3,5-triazine (TRZ) acceptor unit separated by a large twist angle. The emission wavelengths of mono-, bis-, and tri-PXZ-substituted TRZ exhibit a gradual red shift while maintaining a small energy gap between the singlet and triplet excited states. An organic light-emitting diode containing a tri-PXZ-TRZ emitter exhibited a maximum external quantum efficiency of 13.3 +/- 0.5% with yellow-orange emission.

引用

页码：3766 / 3771

页数：6

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