Oriented phosphorescent emitters boost OLED efficiency

被引：146

作者：

Flaemmich, Michael ^{[1
]}

Frischeisen, Joerg ^{[2
]}

Setz, Daniel S. ^{[3
]}

Michaelis, Dirk ^{[1
]}

Krummacher, Benjamin C. ^{[3
]}

Schmidt, Tobias D. ^{[2
]}

Bruetting, Wolfgang ^{[2
]}

Danz, Norbert ^{[1
]}

机构：

[1] Fraunhofer Inst Appl Opt & Precis Engn IOF, D-07745 Jena, Germany

[2] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

[3] OSRAM Opto Semicond, D-93055 Regensburg, Germany

来源：

ORGANIC ELECTRONICS | 2011年 / 12卷 / 10期

关键词：

Organic light-emitting diode; In situ characterization; Emitter orientation; Phosphorescent emitter; Photoluminescence; LIGHT-EMITTING-DIODES; ORGANIC THIN-FILM; CONJUGATED POLYMERS; EMISSION; ELECTROLUMINESCENCE; ORIENTATION; DEVICES; PATTERN; GAIN;

D O I：

10.1016/j.orgel.2011.06.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The orientation distribution of the emissive sites in a phosphorescent Organic LED has been measured utilizing two independent optical methods. In contradiction to common expectations we find a clearly non-isotropic, predominantly parallel emitter orientation in the well-known triplet emitting guest-host system of Ir(MDQ)(2)(acac) blended in an alpha-NPD matrix. This result emphasizes the necessity of more sophisticated assumptions on active emitter properties in quantitative optical OLED analysis, and demonstrates a highly promising approach for OLED efficiency optimization. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1663 / 1668

页数：6

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