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Flexible glass hybridized colloidal quantum dots for Gb/s visible light communications

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Foucher_2018_Flexible_glass_IEEEPJ_8255623_CC.pdf (850.0Kb)
Date
02/2018
Author
Foucher, C.
Sufyan, Mohamed Islim
Guilhabert, B.
Videv, S.
Rajbhandari, S.
Gomez Diaz, A.
Chun, H.
Vithanage, Chiranthika Dimali Amarasinghe
Turnbull, Graham Alexander
Samuel, Ifor David William
Faulkner, G.
O’Brien, D. C.
Hass, H.
Laurand, N.
Dawson, M. D.
Keywords
Visible light communications
Quantum dots
Color converters
QC Physics
T Technology
DAS
Metadata
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Abstract
Color converting films of colloidal quantum dots (CQDs) encapsulated with flexible glass are integrated with microsize GaN LEDs (μLEDs) in order to form optical sources for high-speed visible light communications (VLC). VLC is an emerging technology that uses white and/or colored light from LEDs to combine illumination and display functions with the transmission of data. The flexible glass/CQD format addresses the issue of limited modulation speed of typical phosphor-converted LEDs while enhancing the photostability of the color converters and facilitating their integration with the μLEDs. These structures are less than 70 μm in total thickness and are directly placed in contact with the polished sapphire substrate of 450-nm-emitting μLEDs. Blue-to-green, blue-to-orange and blue-to-red conversion with respective forward optical power conversion efficiencies of 13%, 12% and 5.5% are reported. In turn, free-space optical communications up to 1.4 Gb/s VLC is demonstrated. Results show that CQD-converted LEDs pave the way for practical digital lighting/displays with multi-Gb/s capability.
Citation
Foucher , C , Sufyan , M I , Guilhabert , B , Videv , S , Rajbhandari , S , Gomez Diaz , A , Chun , H , Vithanage , C D A , Turnbull , G A , Samuel , I D W , Faulkner , G , O’Brien , D C , Hass , H , Laurand , N & Dawson , M D 2018 , ' Flexible glass hybridized colloidal quantum dots for Gb/s visible light communications ' , IEEE Photonics Journal , vol. 10 , no. 1 , 8255623 . https://doi.org/10.1109/JPHOT.2018.2792700
Publication
IEEE Photonics Journal
Status
Peer reviewed
DOI
https://doi.org/10.1109/JPHOT.2018.2792700
ISSN
1943-0655
Type
Journal article
Rights
Copyright IEEE 2018. This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/
Description
Funding: EPSRC through the Program grant ’Ultra-parallel visible light communications (UP-VLC)’ (EP/K00042X/1).
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/12791

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