Improving the light extraction efficiency of polymeric light emitting diodes using two-dimensional photonic crystals

被引：46

作者：

Adawi, A. M.

Kullock, R.

Turner, J. L.

Vasilev, C.

Lidzey, D. G.

Tahraoui, A.

Fry, P. W.

Gibson, D.

Smith, E.

Foden, C.

Roberts, M.

Qureshi, F.

Athanassopoulou, N.

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[2] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England

[3] Appl Multilayers LTd, Droitwich WR9 9AS, Worcs, England

[4] Cambridge Display Technol, Cambridge CB3 0TX, England

来源：

ORGANIC ELECTRONICS | 2006年 / 7卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

polymeric light emitting diodes; photonic crystal;

D O I：

10.1016/j.orgel.2006.02.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have fabricated light emitting diodes based on a conjugated polymer, in which a planarized two-dimensional photonic crystal (PC) was inserted between the glass substrate and the ITO anode. Planarized PCs were fabricated into a high-index layer via interference lithography, followed by dry-etching and the spin-casting of a low-index glass. We characterize the electroluminescence (EL) emission from devices containing a PC, and compare this with photoluminescence (PL) generated from within the same structure. We show that LEDs incorporating the PC have an increased EL external quantum efficiency of (2.3 +/- 1.0) times compared to a standard non-patterned control. This efficiency increase is in excellent agreement with PL measurements on similar structures, which also demonstrate relative increases in external emission intensity of 2.3 times. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：222 / 228

页数：7

共 33 条

[1] Thin film encapsulated flexible organic electroluminescent displays [J].