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World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

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Integration by self-aligned writing of nanocrystal/epoxy composites on InGaN micropixelated light-emitting diodes

Guilhabert, B.J.E. and Elfstrom, D. and Kuehne, A.J. and Massoubre, D. and Zhang, H.X. and Jin, S.R. and Mackintosh, A.R. and Gu, E. and Pethrick, R.A. and Dawson, M.D. (2008) Integration by self-aligned writing of nanocrystal/epoxy composites on InGaN micropixelated light-emitting diodes. Optics Express, 16. p. 18933. ISSN 1094-4087

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Abstract

We report on the integration of monodisperse semiconductor nanocrystal (NC) color converters onto gallium nitride ultraviolet micropixelated light-emitting diodes ('micro-LEDs'). Integration is achieved in a 'self-aligned' process by forming a nanocomposite of the respective NCs in a photocurable epoxy polymer. Blue, green, yellow and red NC/epoxy blend microstructures have been successfully integrated onto micro-pixelated LEDs by this technique and utilised for color conversion, resulting in a five color emission single chip. Optical output power density of up to about 166mW/cm2 is measured; spectral emission at 609nm gives an estimated optical-to-optical conversion as high as 18.2% at 30mA driving current.