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Luminous performances characterization of YAG

Ce3+ phosphor/silicone composites using both reflective and transmissive laser excitations

Journal Article (2022)
Author(s)

Yixing Cao (Fudan University)

Wei Chen (Fudan University)

Yunjia Du (Hohai University)

Gaojin Qi (Hohai University)

Thebano Santos (Renato Archer Information Technology Center)

Kouchi Zhang (TU Delft - Electronic Components, Technology and Materials)

J. Fan (Fudan University, TU Delft - Electronic Components, Technology and Materials)

Research Group
Electronic Components, Technology and Materials
Copyright
© 2022 Yixing Cao, Wei Chen, Yunjia Du, Gaojin Qi, Thebano Santos, Kouchi Zhang, J. Fan
DOI related publication
https://doi.org/10.1109/JPHOT.2022.3150517
More Info
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Publication Year
2022
Language
English
Copyright
© 2022 Yixing Cao, Wei Chen, Yunjia Du, Gaojin Qi, Thebano Santos, Kouchi Zhang, J. Fan
Research Group
Electronic Components, Technology and Materials
Bibliographical Note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. @en
Issue number
2
Volume number
14
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Abstract

YAG: Ce3+ phosphor/silicone composites are widely used in solid-state lighting as a light converter to achieve white lighting. However, because of high thermal resistance and low thermal stability, the luminous performance of YAG: Ce3+ phosphor/silicone composite deteriorates rapidly when excited by high-power-density blue-laser. To explore the potential of blue laser-excited YAG: Ce3+ phosphor/silicone composites, the luminous performances under different blue laser power conditions were characterized by both the reflective and transmissive excitations using a self-built three-integrating-sphere system. Furthermore, the Monte-Carlo Ray-tracing simulation was used to illustrate the light-transmission and energy conversion mechanism in the phosphor/silicone composites. The results showed that: (1) The YAG: Ce3+ phosphor/silicone composite could be excited by the 0.292W laser light with the peak wavelength of 445nm, excessive laser power will cause phosphor thermal quenching and silicone carbonization. (2) The luminous flux of the composite under both the reflective and transmissive excitations gradually increased with the increase of phosphor concentration; correspondingly, the color coordinate moved to the yellow region, and the Correlated Color Temperature (CCT) gradually decreased. (3) The simulation results indicated that under the same phosphor concentration, the luminous flux obtained by reflection excitation was largely higher than that by the transmission excitation, as the light re-conversion and strong back-scattering were occurred in the reflective and transmissive laser excitation respectively.