Comparison of blue-emitting phosphorescent dopants: Effect of molecular energy levels on device efficiency

被引：6

作者：

Brooks, JJ ^{[1
]}

Kwong, RC ^{[1
]}

Tung, YJ ^{[1
]}

Weaver, MS ^{[1
]}

D'Andrade, B ^{[1
]}

Adamovich, V ^{[1
]}

Thomspon, ME ^{[1
]}

Forrest, SR ^{[1
]}

Brown, JJ ^{[1
]}

机构：

[1] Universal Display Corp, Ewing, NJ 08618 USA

来源：

ORGANIC LIGHT-EMITTING MATERIALS AND DEVICES VIII | 2004年 / 5519卷

关键词：

OLED; phosphorescent; iridium;

D O I：

10.1117/12.564757

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two blue-shifted iridium phenyl-pyridine dopants are compared in identical device structures. While the dopants have very similar optical behavior, it is found that the device efficiencies are very different and dependent on the host material. Upon comparison of molecular energy levels it is proposed that the electronic properties of the dopant influence the device efficiency through an electron trapping mechanism. It is believed that the relative energetics between the host and dopant play an integral role in the operation of the device.

引用

收藏

页码：35 / 41

页数：7

相关论文

共 24 条

[1] Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].

Adachi, C ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (10) :5048-5051

[2] Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materials [J].

Adachi, C ;

Kwong, RC ;

Djurovich, P ;

Adamovich, V ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 2001, 79 (13) :2082-2084

[3] ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF CATION RADICALS .3. REACTION PATHWAYS OF CARBAZOLIUM RADICAL IONS [J].

AMBROSE, JF ;

CARPENTER, LL ;

NELSON, RF .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1975, 122 (07) :876-894

[4] Excitonic singlet-triplet ratio in a semiconducting organic thin film [J].

Baldo, MA ;

O'Brien, DF ;

Thompson, ME ;

Forrest, SR .

PHYSICAL REVIEW B, 1999, 60 (20) :14422-14428

[5] Highly efficient phosphorescent emission from organic electroluminescent devices [J].

Baldo, MA ;

O'Brien, DF ;

You, Y ;

Shoustikov, A ;

Sibley, S ;

Thompson, ME ;

Forrest, SR .

NATURE, 1998, 395 (6698) :151-154

[6] Synthesis and characterization of phosphorescent cyclometalated platinum complexes [J].

Brooks, J ;

Babayan, Y ;

Lamansky, S ;

Djurovich, PI ;

Tsyba, I ;

Bau, R ;

Thompson, ME .

INORGANIC CHEMISTRY, 2002, 41 (12) :3055-3066

[7]

BROWN JJ, 2004, IMID

[8]

DANDRADE B, UNPUB

[9] Synthesis and application of dimeric 1,3,5-triazine ethers as hole-blocking materials in electroluminescent devices [J].

Fink, R ;

Heischkel, Y ;

Thelakkat, M ;

Schmidt, HW ;

Jonda, C ;

Huppauff, M .

CHEMISTRY OF MATERIALS, 1998, 10 (11) :3620-3625

[10] Simultaneous light emission from a mixture of dendrimer encapsulated chromophores:: A model for single-layer multichromophoric organic light-emitting diodes [J].

Furuta, P ;

Brooks, J ;

Thompson, ME ;

Fréchet, JMJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (43) :13165-13172