Optically-Pumped Lasing in Hybrid Organic-Inorganic Light-Emitting Diodes

被引：47

作者：

Song, Myoung Hoon ^{[1
,3
]}

Kabra, Dinesh ^{[1
]}

Wenger, Bernard ^{[1
]}

Friend, Richard H. ^{[1
]}

Snaith, Henry J. ^{[2
]}

机构：

[1] Cavendish Lab, Cambridge CB3 OHE, England

[2] Clarendon Lab, Oxford OX1 3PU, England

[3] Ulsan Natl Inst Sci & Technol, Sch Mech & Adv Mat Engn, Ulsan, South Korea

来源：

ADVANCED FUNCTIONAL MATERIALS | 2009年 / 19卷 / 13期

基金：

英国工程与自然科学研究理事会;

关键词：

AMPLIFIED SPONTANEOUS EMISSION; BETA-PHASE; EFFICIENCY; LASERS; ENHANCEMENT; SCATTERING; DEVICES; FILM;

D O I：

10.1002/adfm.200801833

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Here, the use of metal oxide layers both for charge transport and injection into an emissive semiconducting polymer and also for the control of the in-plane waveguided optical modes in light-emitting diodes (LEDs) is reported. The high refractive index of zinc oxide is used to confine these modes away from the absorbing electrodes, and include a nano-imprinted grating in the polymer layer to introduce distributed feedback and enhance optical out-coupling. These structures show a large increase in the luminescence efficiency over conventional devices, with photoluminescence efficiency increased by up to 45%. Furthermore, optically-pumped lasing in hybrid oxide polymer LEDs is demonstrated. A tuneable lasing emission is also obtained in a single device structure by employing a graduated thickness of a zinc oxide inter-layer. This demonstrates the scope for using such architectures to improve the external efficiency of organic semiconductor LEDs, and opens new possibilities for the realization of polymer injection lasers.

引用

页码：2130 / 2136

页数：7

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