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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 Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

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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.