Mixing of Phosphorescent and Exciplex Emission in Efficient Organic Electroluminescent Devices

被引：80

作者：

Cherpak, Vladyslav ^{[1
]}

Stakhira, Pavlo ^{[1
]}

Minaev, Boris ^{[2
]}

Baryshnikov, Gleb ^{[2
]}

Stromylo, Evgeniy ^{[2
]}

Helzhynskyy, Igor ^{[1
]}

Chapran, Marian ^{[1
]}

Volyniuk, Dmytro ^{[3
]}

Hotra, Zenon ^{[1
,4
]}

Dabuliene, Asta ^{[3
]}

Tomkeviciene, Ausra ^{[3
]}

Voznyak, Lesya ^{[3
]}

Grazulevicius, Juozas Vidas ^{[3
]}

机构：

[1] Lviv Polytech Natl Univ, UA-79013 Lvov, Ukraine

[2] Bohdan Khmelnytsky Natl Univ, UA-18031 Cherkassy, Ukraine

[3] Kaunas Univ Technol, Dept Polymer Chem & Technol, LT-50254 Kaunas, Lithuania

[4] Rzeszow Univ Technol, PL-35959 Rzeszow, Poland

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 02期

关键词：

organic light-emitting diode; thermally activated delayed fluorescence; reverse intersystem crossing; starshaped carbazole-based compound; blue iridium complex; density functional theory; LIGHT-EMITTING-DIODES; DELAYED-FLUORESCENCE; OLEDS; BILAYER; FILMS; EXCIMER;

D O I：

10.1021/am507050g

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We fabricated a yellow organic light-emitting diode (OLED) based on the star-shaped donor compound tri(9-hexylcarbazol-3-yl)amine, which provides formation of the interface exciplexes with the iridium(III) bis[4,6-difluorophenyl]-pyridinato-N,C2']picolinate (FIrpic). The exciplex emission is characterized by a broad band and provides a condition to realize the highly effective white OLED. It consists of a combination of the blue phosphorescent emission from the FIrpic complex and a broad efficient delayed fluorescence induced by thermal activation with additional direct phosphorescence from the triplet exciplex formed at the interface. The fabricated exciplex-type device exhibits a high brightness of 38000 cd/m(2) and a high external quantum efficiency.

引用

页码：1219 / 1225

页数：7

共 43 条

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