Next Article in Journal
Novel Development of Phosphate Treated Porous Hydroxyapatite
Next Article in Special Issue
Diffusion-Driven Charge Transport in Light Emitting Devices
Previous Article in Journal
The Many Faces of Graphene as Protection Barrier. Performance under Microbial Corrosion and Ni Allergy Conditions
Previous Article in Special Issue
Effect of Electron Blocking Layer Doping and Composition on the Performance of 310 nm Light Emitting Diodes
Open AccessArticle

Investigation of Saturation Effects in Ceramic Phosphors for Laser Lighting

DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, 4000 Roskilde, Denmark
*
Author to whom correspondence should be addressed.
Materials 2017, 10(12), 1407; https://doi.org/10.3390/ma10121407
Received: 31 October 2017 / Revised: 4 December 2017 / Accepted: 6 December 2017 / Published: 8 December 2017
(This article belongs to the Special Issue Light Emitting Diodes and Laser Diodes: Materials and Devices)
We report observations of saturation effects in a Ce:LuAG and Eu-doped nitride ceramic phosphor for conversion of blue laser light for white light generation. The luminous flux from the phosphors material increases linearly with the input power until saturation effects limit the conversion. It is shown that the temperature of the phosphor layer influences the saturation power level and the conversion efficiency. It is also shown that the correlated color temperature (CCT), phosphor conversion efficiency and color rendering index (CRI) are dependent both on the incident power and spot size diameter of the illumination. A phosphor conversion efficiency up to 140.8 lm/W with CRI of 89.4 was achieved. The saturation in a ceramic phosphor, when illuminated by high intensity laser diodes, is estimated to play the main role in limiting the available luminance from laser-based lighting systems. View Full-Text
Keywords: phosphor-converted; laser diode; Ce:LuAG and Eu-doped nitride; saturation phosphor-converted; laser diode; Ce:LuAG and Eu-doped nitride; saturation
Show Figures

Figure 1

MDPI and ACS Style

Krasnoshchoka, A.; Thorseth, A.; Dam-Hansen, C.; Corell, D.D.; Petersen, P.M.; Jensen, O.B. Investigation of Saturation Effects in Ceramic Phosphors for Laser Lighting. Materials 2017, 10, 1407.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop