White Light from a Single-Emitter Light-Emitting Electrochemical Cell

被引：81

作者：

Tang, Shi ^{[1
]}

Pan, Junyou ^{[2
]}

Buchholz, Herwig A. ^{[2
]}

Edman, Ludvig ^{[1
]}

机构：

[1] Umea Univ, Dept Phys, Organ Photon & Elect Grp, SE-90187 Umea, Sweden

[2] Merck KGaA, D-64293 Darmstadt, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2013年 / 135卷 / 09期

基金：

瑞典研究理事会;

关键词：

TRANSITION-METAL-COMPLEXES; CATIONIC IRIDIUM COMPLEXES; EFFICIENT BLUE-GREEN; POLYMER BLENDS; N-JUNCTION; DEVICES; DIODES; EMISSION; LAYER; RED;

D O I：

10.1021/ja312548b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a novel and generic approach for attaining white light from a single-emitter light-emitting electrochemical cell (LEC). With an active-layer comprising a multifluorophoric conjugated copolymer (MCP) and an electrolyte designed to inhibit MCP energy-transfer interactions during LEC operation, we are able to demonstrate LECs that emit broad-band white light with a color rendering index of 82, a correlated-color temperature of 4000 K, and a current conversion efficacy of 3.8 cd/A. It is notable that this single-emitter LEC configuration eliminates color-drift problems stemming from phase separation, which are commonly observed in conventional blended multiemitter devices. Moreover, the key role of the electrolyte in limiting undesired energy-transfer reactions is highlighted by the observation that an electrolyte-free organic light-emitting diode comprising the same MCP emits red light.

引用

页码：3647 / 3652

页数：6

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