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Driving innovations in manufacturing: Open Access research from DMEM

Strathprints makes available Open Access scholarly outputs by Strathclyde's Department of Design, Manufacture & Engineering Management (DMEM).

Centred on the vision of 'Delivering Total Engineering', DMEM is a centre for excellence in the processes, systems and technologies needed to support and enable engineering from concept to remanufacture. From user-centred design to sustainable design, from manufacturing operations to remanufacturing, from advanced materials research to systems engineering.

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Wavelength-tunable and white light emission from polymer-converted micropixellated InGaN ultraviolet light-emitting diodes

Heliotis, G. and Gu, E. and Griffin, C. and Jeon, C.W. and Stavrinou, P.N. and Dawson, M.D. and Bradley, D.D.C. (2006) Wavelength-tunable and white light emission from polymer-converted micropixellated InGaN ultraviolet light-emitting diodes. Journal of Optics A: Pure and Applied Optics, 8 (7). S445-S449. ISSN 1464-4258

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Abstract

We report the use of light-emitting conjugated polymer materials to wavelength-convert the emission from a two-dimensional array of micropixellated InGaN light-emitting diodes (LEDs). We demonstrate hybrid organic/inorganic light-emitting devices that can operate across the entire visible spectrum, and we also fabricate white-emitting versions of these devices by employing single layers of carefully adjusted polymer blends in which cascade non-radiative energy transfer occurs between the constituent materials. Additional colours may be easily obtained by tuning the composition of the polymer blends. Our work demonstrates that the combination of conjugated polymers and UV micro-LED arrays provides an attractive approach to developing microscale wavelength-tunable light sources and may provide a route to low-cost full-colour microdisplays and other instrumentation devices.