Simply structured, deep-blue phosphorescent organic light-emitting diode with bipolar host material

被引：17

作者：

Fukagawa, Hirohiko ^{[1
]}

Irisa, Shiro ^{[2
]}

Hanashima, Hiromu ^{[3
]}

Shimizu, Takahisa ^{[1
]}

Tokito, Shizuo ^{[1
]}

Yokoyama, Norimasa ^{[2
]}

Fujikake, Hideo ^{[1
]}

机构：

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

[2] Hodogaya Chem Co Ltd, Tsukuba, Ibaraki 3050841, Japan

[3] Tokyo Univ Sci, Tokyo 1628610, Japan

来源：

ORGANIC ELECTRONICS | 2011年 / 12卷 / 10期

关键词：

Blue organic light-emitting diode; Phosphorescent; Novel host material; Bipolar; High triplet energy; HIGH-EFFICIENCY; ENERGY-TRANSFER; DEVICES; ELECTROPHOSPHORESCENCE; OLEDS; DERIVATIVES; EMISSION; LAYERS; GREEN;

D O I：

10.1016/j.orgel.2011.06.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We developed an efficient, deep-blue phosphorescent organic light-emitting diode (POLED) with a simplified device structure using a new host material. There are only three organic layers in the deep-blue POLED, namely, a hole-transporting layer, an emitting layer and an electron-transporting layer. The new host material exhibits bipolar carrier transportability and high triplet energy. The POLED utilizes a phosphorescent guest material, iridium(III) bis(4',6',-difluorophenylpyridinato)tetrakis(1-pyrazolyl) borate, that exhibits an external quantum efficiency of about 13% and a power efficiency of about 15 lm/W at a current density of 0.1 mA/cm(2). The efficiencies of the POLED are comparable to those of conventional POLEDs consisting of at least four organic layers. The bipolar host material will be useful for simplifying the device structure of deep-blue POLEDs. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1638 / 1643

页数：6

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