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Open Access research which pushes advances in bionanotechnology

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SIPBS is a major research centre in Scotland focusing on 'new medicines', 'better medicines' and 'better use of medicines'. This includes the exploration of nanoparticles and nanomedicines within the wider research agenda of bionanotechnology, in which the tools of nanotechnology are applied to solve biological problems. At SIPBS multidisciplinary approaches are also pursued to improve bioscience understanding of novel therapeutic targets with the aim of developing therapeutic interventions and the investigation, development and manufacture of drug substances and products.

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A saturated red color converter for visible light communication using a blend of star-shaped organic semiconductors

Sajjad, M. T. and Manousiadis, P. P. and Orofino, C. and Kanibolotsky, A. L. and Findlay, N. J. and Rajbhandari, S. and Vithanage, D. A. and Chun, H. and Faulkner, G. E. and O'Brien, D. C. and Skabara, P. J. and Turnbull, G. A. and Samuel, I. D. W. (2017) A saturated red color converter for visible light communication using a blend of star-shaped organic semiconductors. Applied Physics Letters, 110 (1). ISSN 0003-6951

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    Abstract

    We report a study of blends of semiconducting polymers as saturated red color converters to replace commercial phosphors in hybrid Light emitting diodes (LEDs) for visible light communication (VLC). By blending two star-shaped organic semiconductor molecules, we found a near complete energy transfer (>90% efficiency) from the green-emitting truxene-cored compound T4BT-B to the red-emitting boron dipyrromethene (BODIPY) cored materials. Furthermore, we have demonstrated the capability of these materials as fast color converters for VLC by measuring their intrinsic optical modulation bandwidth and data rate. The measured 3 dB modulation bandwidth of blends (∼55 MHz) is more than 10 times higher than commercially available LED phosphors and also higher than the red-emitting BODIPY color converter alone in solution. The data rate achieved with this blend is 20 times higher than measured with a commercially available phosphor based color converter.