High-efficiency phosphorescent polymer light-emitting devices

被引：184

作者：

Tokito, S

Suzuki, M

Sato, F

Kamachi, M

Shirane, K

机构：

[1] NHK Sci & Technol Res Labs, Setagaya Ku, Tokyo 1578510, Japan

[2] Showa Denko Co Ltd, Corp R&D Ctr, Chiba 2670056, Japan

来源：

ORGANIC ELECTRONICS | 2003年 / 4卷 / 2-3期

关键词：

D O I：

10.1016/j.orgel.2003.08.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, we describe the performance of polymer light-emitting devices (PLEDs) that are based on phosphorescent polymers involving a carbazole unit and an iridium-complex unit. The PLEDs exhibit red, green or blue emission, depending on the phosphorescent polymer used in the emissive layer. We achieved highly external quantum efficiencies of 5.5%, 9% and 3.5% in respective red, green and blue PLEDs by selecting the electron transport material for the emissive layer and optimizing the content of the iridium-complex unit in the phosphorescent polymer chain. Furthermore, we demonstrated white emission in PLEDs by using blue-phosphorescent and red-phosphorescent polymers. An external quantum efficiency of 4.5% was obtained for this emission. (C) 2003 Elsevier B.V. All rights reserved.

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页码：105 / 111

页数：7

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