A saturated red color converter for visible light communication using a blend of star-shaped organic semiconductors
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We report a study of blends of semiconducting polymers as saturated red color converters to replace commercial phosphors in hybrid 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.
Sajjad , M T , Manousiadis , P , Orofino , C , Kanibolotsky , A , Findlay , N , Rajbhandari , S , Vithanage , C D A , Chun , H , Faulkner , G , O'Brien , D , Skabara , P , Turnbull , G A & 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 , vol 110 , no. 1 , 013302 . DOI: 10.1063/1.4971823
Applied Physics Letters
© 2016, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at scitation.aip.org / http://dx.doi.org/10.1063/1.4971823
Authors would like to acknowledge the EPSRC for financial support for the UP-VLC (EP/K00042X/1). PJS and IDWS also acknowledge Royal Society Wolfson Research Merit Awards.
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