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Three generations of luminous devices: a comparison in search of energy efficiency and ecologyca re
(4th International Congress on Alternative Energies, 2013-10-15)
ln this work a comparison is made between three generations of luminous devices, in order to have a quantitative estimation about the advantages of the new technologies on illumination sources based on Light Emitting Oiodes ...
Eu(II)-Activated Silicates for UV Light-Emitting Diodes Tuning into Warm White Light
(2020-08-01)
White-light-emitting diodes (WLEDs) are the main white light source for general lighting due to high-luminous efficacy (>150 lm W−1), long lifespan (5 × 104 h), and environmentally friendly properties. Despite the current ...
Recent prospects on phosphor-converted LEDs for lighting, displays, phototherapy, and indoor farming
(2021-09-01)
Phosphor-converted white-light-emitting diodes (PC-WLEDs) are the main devices behind solid-state lighting (SSL) for both indoor and outdoor lighting, or backlight of liquid-crystal displays (LCD). Nonetheless, despite the ...
Effects on Light Efficiency in Discharge and Solid-State Lighting Operation, Supplied by No-Sinusoidal Voltage
(Ieee-inst Electrical Electronics Engineers Inc, 2016-05-01)
The widespread use of discharge lamps and solid-state lighting is justified by its high-energy efficiency. However, the massive use causes degradation of power quality provided. In this context, the objective was the ...
Dy3+/Tb3+-codoped tunable warm light-emitting fluorogermanate glass phosphor
(2016-11-01)
Polychromatic tunable visible light emission in the region of the low correlated color temperature range using Dy3+/Tb3+ codoped PbGeO3:PbF2:CdF2 glass phosphor under UV-blue LED light excitation is presented. The glass ...
Phosphor-based green-emitting coatings for circadian lighting
(2020-08-01)
Light-emitting diodes (LEDs) combining UV-emitting LEDs (UV-LED) with multi-coloured phosphors is one of the main strategies in solid-state lighting, opening new frontiers for the design of monochromatic sources. Greater ...
Effects on Light Efficiency in Discharge and Solid-State Lighting Operation, Supplied by Non-Sinusoidal Voltage
(2016-05-01)
The widespread use of discharge lamps and solid-state lighting is justified by its high-energy efficiency. However, the massive use causes degradation of power quality provided. In this context, the objective was the ...
Synthesis, characterization and thermal behaviour of light trivalent lanthanides folates on solid state
(Springer, 2011-09-01)
Solid state Ln(2)-L(3) compounds, where Ln stands for light trivalent lanthanides (lanthanum to gadolinium), except promethium, and L is folate (C(19)H(17)N(7)O(6)), have been synthesized. Simultaneous thermogravimetry and ...
Synthesis, characterization and thermal behaviour of light trivalent lanthanides folates on solid state
(Springer, 2011-09-01)
Solid state Ln(2)-L(3) compounds, where Ln stands for light trivalent lanthanides (lanthanum to gadolinium), except promethium, and L is folate (C(19)H(17)N(7)O(6)), have been synthesized. Simultaneous thermogravimetry and ...
Progress on holographic techniques to study photo-chemical reactions in solid state
(2003-12-01)
In this paper it is presented recent developments in the heterodyne detection holographic techniques for studding photosensitive materials. The actual state of the technique allows simultaneous and independent measurement ...