BODIPY star-shaped molecules as solid state colour converters for visible light communications

Vithanage, D. A. and Manousiadis, P. P. and Sajjad, M. T. and Rajbhandari, S. and Chun, H. and Orofino, C. and Cortizo-Lacalle, D. and Kanibolotsky, A. L. and Faulkner, G. and Findlay, N. J. and O'Brien, D. C. and Skabara, P. J. and Samuel, I. D W and Turnbull, G. A. (2016) BODIPY star-shaped molecules as solid state colour converters for visible light communications. Applied Physics Letters, 109 (1). 013302. ISSN 0003-6951 (https://doi.org/10.1063/1.4953789)

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Abstract

In this paper, we study a family of solid-state, organic semiconductors for visible light communications. The star-shaped molecules have a boron-dipyrromethene (BODIPY) core with a range of side arm lengths which control the photophysical properties. The molecules emit red light with photoluminescence quantum yields ranging from 22% to 56%. Thin films of the most promising BODIPY molecules were used as a red colour converter for visible light communications. The film enabled colour conversion with a modulation bandwidth of 73 MHz, which is 16 times higher than that of a typical phosphor used in LED lighting systems. A data rate of 370 Mbit/s was demonstrated using On-Off keying modulation in a free space link with a distance of ∼15 cm.

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