Novel triplet host materials with high energy gap and thermal stability for organic electrophosphorescent devices

被引：3

作者：

Qiao, Juan ^{[1
]}

D Wang, Li ^{[1
]}

Qiu, Yong ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Minist Educ, Beijing 100084, Peoples R China

来源：

ORGANIC OPTOELECTRONICS AND PHOTONICS II | 2006年 / 6192卷

基金：

中国国家自然科学基金;

关键词：

organic electrophosphorescent devices; host material; blue; triplet energy; thermal stability;

D O I：

10.1117/12.666915

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Organic electrophosphorescent materials and devices are the prime focus of organic light-emitting diodes research due to their high external quantum efficiency and power efficiency. The host materials with both high triplet. energy level and high thermal stability are especially formidable for blue phosphorescent emitters. Herewith we report a. novel triplet host material based on fluorene, 9,9-bi (4'-carbazol-phenyl)fluorene (CPF), in which two phenyl-carbazole moieties are connected to C9 carbon of the fluorene. This compound possesses not only desirably high triplet (2.9 eV) energies, but also extremely high glass transition temperature (Tg = 165 degrees C) and thermal stability. By using CPF as the host material, blue-emitting phosphorescent devices exhibited much higher efficiency and longer lifetime than those with CBP host.

引用

页数：9

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