Leitao, M. F. et al. (2019) Pump-power-dependence of CsPbBr₃-in-Cs₄PbBr₆ quantum dot color converter. Optical Materials Express, 9(8), pp. 3504-3518. (doi: 10.1364/OME.9.003504)
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Abstract
A detailed study of the pump-intensity dependent characteristics of an all-inorganic CsPbBr3-in-Cs4PbBr6 quantum dot (QD) color converter are reported. This is an attractive material to color convert UV/blue GaN optical pump sources for digital lighting applications, e.g. visible light communications (VLC). It demonstrates narrow spectral emission (522 nm peak emission and < 20 nm full-width-at-half-maximum), invariant with the pump power density (from 0 to 7.15 kW/cm2). The optical bandwidth increases, from 10 MHz at 300 µW/cm2, up to 22 MHz at 3 W/cm2, and 41 MHz at 7.15 kW/cm2. This acceleration of the emission is ascribed to both an increase of the radiative decay rate in the low-pump-density regime, and to the emergence of non-radiative pathways at higher pump density. The higher bandwidth at high-pump density enables a 30% increase in the data rate of a free space VLC link using this color converter.
| Item Type: | Articles |
|---|---|
| Additional Information: | Funding: Engineering and Physical Sciences Research Council (EPSRC) (EP/K00042X/1, EP/P0274X/2). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Viola, Mr Shaun and Watson, Dr Scott and Kelly, Professor Anthony |
| Authors: | Leitao, M. F., Islim, M.S., Yin, L., Viola, S., Watson, S., Kelly, A., Dong, Y., Li, X., Zheng, H., Videv, S., Haas, H., Gu, E., Watson, I.M., Laurand, N., and Dawson, M.D. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Optical Materials Express |
| Publisher: | Optical Society of America |
| ISSN: | 2159-3930 |
| ISSN (Online): | 2159-3930 |
| Copyright Holders: | Copyright © 2019 Journal |
| First Published: | First published in Optical Materials Express 9:3504-3518 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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