Pump-power-dependence of a CsPbBr 3-in-Cs 4PbBr 6 quantum dot color converter

Miguel F. Leitão, M. S. Islim, L. Yin, S. Viola, S. Watson, A. Kelly, Y. Dong, X. Li, H. Zeng, S. Videv, H. Haas, E. Gu, I. M. Watson, N. Laurand, M. D. Dawson

Research output: Contribution to journalArticle

Abstract

A detailed study of the pump-intensity dependent characteristics of an all-inorganic CsPbBr 3-in-Cs 4PbBr 6 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/cm 2). The optical bandwidth increases, from 10MHz at 300 μW/cm 2, up to 22MHz at 3 W/cm 2, and 41MHz at 7.15 kW/cm 2. 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.

LanguageEnglish
Pages3504-3518
Number of pages15
JournalOptical Materials Express
Volume9
Issue number8
Early online date29 Jul 2019
DOIs
Publication statusPublished - 1 Aug 2019

Fingerprint

Semiconductor quantum dots
Pumps
Color
Bandwidth
Full width at half maximum
Telecommunication links
Light sources
Lighting
Visible light communication

Keywords

  • quantum dot
  • colour converter
  • pump power density

Cite this

Leitão, Miguel F. ; Islim, M. S. ; Yin, L. ; Viola, S. ; Watson, S. ; Kelly, A. ; Dong, Y. ; Li, X. ; Zeng, H. ; Videv, S. ; Haas, H. ; Gu, E. ; Watson, I. M. ; Laurand, N. ; Dawson, M. D. / Pump-power-dependence of a CsPbBr 3-in-Cs 4PbBr 6 quantum dot color converter. In: Optical Materials Express. 2019 ; Vol. 9, No. 8. pp. 3504-3518.
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Leitão, MF, Islim, MS, Yin, L, Viola, S, Watson, S, Kelly, A, Dong, Y, Li, X, Zeng, H, Videv, S, Haas, H, Gu, E, Watson, IM, Laurand, N & Dawson, MD 2019, 'Pump-power-dependence of a CsPbBr 3-in-Cs 4PbBr 6 quantum dot color converter' Optical Materials Express, vol. 9, no. 8, pp. 3504-3518. https://doi.org/10.1364/OME.9.003504

Pump-power-dependence of a CsPbBr 3-in-Cs 4PbBr 6 quantum dot color converter. / Leitão, Miguel F.; Islim, M. S.; Yin, L.; Viola, S.; Watson, S.; Kelly, A.; Dong, Y.; Li, X.; Zeng, H.; Videv, S.; Haas, H.; Gu, E.; Watson, I. M.; Laurand, N.; Dawson, M. D.

In: Optical Materials Express, Vol. 9, No. 8, 01.08.2019, p. 3504-3518.

Research output: Contribution to journalArticle

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T1 - Pump-power-dependence of a CsPbBr 3-in-Cs 4PbBr 6 quantum dot color converter

AU - Leitão, Miguel F.

AU - Islim, M. S.

AU - Yin, L.

AU - Viola, S.

AU - Watson, S.

AU - Kelly, A.

AU - Dong, Y.

AU - Li, X.

AU - Zeng, H.

AU - Videv, S.

AU - Haas, H.

AU - Gu, E.

AU - Watson, I. M.

AU - Laurand, N.

AU - Dawson, M. D.

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Y1 - 2019/8/1

N2 - A detailed study of the pump-intensity dependent characteristics of an all-inorganic CsPbBr 3-in-Cs 4PbBr 6 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/cm 2). The optical bandwidth increases, from 10MHz at 300 μW/cm 2, up to 22MHz at 3 W/cm 2, and 41MHz at 7.15 kW/cm 2. 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.

AB - A detailed study of the pump-intensity dependent characteristics of an all-inorganic CsPbBr 3-in-Cs 4PbBr 6 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/cm 2). The optical bandwidth increases, from 10MHz at 300 μW/cm 2, up to 22MHz at 3 W/cm 2, and 41MHz at 7.15 kW/cm 2. 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.

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KW - colour converter

KW - pump power density

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EP - 3518

JO - Optical Materials Express

T2 - Optical Materials Express

JF - Optical Materials Express

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ER -