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Tuning the colour of white polymer light emitting diodes

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Author: Kok, M.M. de · Sarfert, W. · Paetzold, R.
Type:article
Date:2010
Institution: TNO Industrie en Techniek
Source:Thin Solid Films, 18, 518, 5265-5271
Identifier: 409305
Keywords: Electronics · Colour tuning · Lighting · Organic light emitting diodes · White LED · Active material · Electrical stress · Material designs · Polymer LEDs · Polymer light emitting diode · Production process · Diodes · Display devices · Light emission · Light emitting diodes · Light sources · Physical optics · Polymers · Water analysis · Organic light emitting diodes (OLED) · Industrial Innovation · Mechatronics, Mechanics & Materials · HOL - Holst · TS - Technical Sciences

Abstract

Colour tuning of white polymer light emitting diode (LED) light sources can be attained by various methods at various stages in the production process of the lamps and/or by the design of the active material incorporated in the LEDs. In this contribution we will describe the methods and discuss the physical background of colour tuning. Furthermore, the material design has led to polymers which are more stable during electrical stress, so that colour shift during lifetime can be excluded for white polymer LEDs. © 2010 Elsevier B.V.