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

Journal article

Sajjad, T, Manousiadis, PP, Orofino, Clara, Kanibolotsky, AL, Findlay, Neil J, Rajbhandari, Sujan, Vithanage, DA, Chun, Hyunchae, Faulkner, GE and O’Brien, DC (2017). A saturated red color converter for visible light communication using a blend of star-shaped organic semiconductors. Applied Physics Letters. 110 (1), pp. 013302-013302. https://doi.org/10.1063/1.4971823
AuthorsSajjad, T, Manousiadis, PP, Orofino, Clara, Kanibolotsky, AL, Findlay, Neil J, Rajbhandari, Sujan, Vithanage, DA, Chun, Hyunchae, Faulkner, GE and O’Brien, DC
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.
The authors would like to acknowledge the EPSRC for financial support for the programme/project from grants EP/K00042X/I and EP/L017008/I. P.J.S. and I.D.W.S. also acknowledge Royal Society Wolfson Research Merit Awards. The research data supporting this publication can be accessed at http://dx.doi.org/10.17630/b117fce7-9de4-4af3-a4bf-368096c014af.

Year2017
JournalApplied Physics Letters
Journal citation110 (1), pp. 013302-013302
PublisherAIP
ISSN0003-6951
Digital Object Identifier (DOI)https://doi.org/10.1063/1.4971823
Publication dates
Print06 Jan 2017
Online06 Jan 2017
Publication process dates
Accepted01 Nov 2016
Deposited05 Feb 2020
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