Concept
Halogen lamp
Related publications (35)
III-N blue-emitting epi-structures with high densities of dislocations: Fundamental mechanisms for efficiency improvement and applications
Since the dawn of humanity, human beings seeked to light their surroundings for their well-being, security and development. The efficiency of ancient lighting devices, e.g. oil lamps or candles, was in the order of 0.03-0.04% and jumped to 0.4-0.6% with th ...
EPFL2024Printed ecoresorbable temperature sensors for environmental monitoring
Danick Briand, Nicolas Francis Fumeaux, James Alec Pierce Bourely, Melissa Kossairi
Abstract Electronic waste has become a pressing issue, necessitating sustainable solutions for the disposal of electronic devices. While the development of environmentally degradable electronics has gained attention, the fabrication of stable and performan ...
2023Photonic nanostructures mimicking floral epidermis for perovskite solar cells
Mohammad Khaja Nazeeruddin, Hobeom Kim
Here, we report photonic nanostructures replicated from the adaxial epidermis of flower petals onto light-polymerized coatings using low-cost nanoimprint lithography at ambient temperature. These multifunctional nanocoatings are applied to confer enhanced ...
ELSEVIER2022Healing plasma current ramp-up by nitrogen seeding in the full tungsten environment of WEST
Olivier Sauter, Federico Alberto Alfredo Felici, Simon Van Mulders
Achieving a successful plasma current ramp-up in a full tungsten tokamak can be challenging due to the large core radiation (and resulting low core temperature) that can be faced with this heavy metallic impurity if its relative concentration is too high. ...
IOP Publishing Ltd2022Exploiting end-of-life lamps fluorescent powder e-waste as a secondary resource for critical rare earth metals
Christian Ludwig, Rudolf Paul Wilhelm Jozef Struis, Ajay Bhagwan Patil, Mohamed Tarik
The consensus is growing for the UN sustainable development goals regarding responsible consumption, production, and climate actions. Because of growth towards a digital society (“industry 4.0 revolution”), it is needed to have our resources and economies ...
2021Does glazing color influence our perception of discomfort glare from daylight?
Spectrum and correlated colour temperature of light are shown to influence human visual comfort. Previous research conducted with electric light, mainly in the context of vehicular headlamps, have demonstrated that coloured LEDs induce more discomfort glar ...
2021Elucidating the role of the InGaN UL in the efficiency of InGaN based light-emitting diodes
Blue III-nitride light-emitting diodes (LEDs) are widely used nowadays in solid-state lighting, as white light can be produced by combining yellow phosphors and blue LEDs. This technology has the advantage to have a higher luminous efficiency than incandes ...
EPFL2019Lead Halide Residue as a Source of Light-Induced Reversible Defects in Hybrid Perovskite Layers and Solar Cells
Quentin Thomas Jeangros, Jakub Holovsky, Chien-Jen Yang, Martin Ledinsky
Advanced characterization methods avoiding transient effects in combination with solar cell performance monitoring reveal details of reversible light-induced perovskite degradation under vacuum. A clear signature of related deep defects in at least the 1 p ...
2019Application of the VUV and the soft x-ray systems on JET for the study of intrinsic impurity behavior in neon seeded hybrid discharges
This paper reports on impurity behavior in a set of hybrid discharges with Ne seeding-one of the techniques considered to reduce the power load on reactor walls. A series of experiments carried out with light gas injection on JET with the ITER-Like-Wall (I ...
2018Ion cyclotron resonance heating for tungsten control in various JET H-mode scenarios
Jonathan Graves, Javier García Hernández
Ion cyclotron resonance heating (ICRH) in the hydrogen minority scheme provides central ion heating and acts favorably on the core tungsten transport. Full wave modeling shows that, at medium power level (4MW), after collisional redistribution, the ratio o ...
2017