摘要:
A phosphor converted light emitting device includes a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the light emitting layer being configured to emit light having a first peak wavelength; a first phosphor configured to emit light having a second peak wavelength; and a second phosphor configured to emit light having a third peak wavelength. The second phosphor is an Eu 3+- activated phosphor, configured such that in the excitation spectrum at 298K and 1.013 bar, a maximum intensity in a wavelength range between 460 nm and 470 nm is at least 5% of a maximum intensity in a wavelength range between 220 nm to 320 nm.
摘要:
The invention is concerned with a discharge lamp provided with a gas discharge vessel comprising a gas filling with a discharge-maintaining composition, at least part of a wall of the discharge vessel being provided with a luminescent material comprising as a first UV-phosphor a lanthanide-activated lanthanum magnesium aluminate of formula Lai_xMgAlπOic>:Lnx, wherein the lanthanide Ln is selected from the group of Ce(III), Pr(III), Nd(III) and Gd(III), and 0.001 :Lnx, wherein the lanthanide Ln is selected from the group of Ce(III), Pr(III), Nd(III) and Gd(III), and 0.001
摘要:
The invention relates to illumination devices (1) with a light source (2) and an afterglow surface (4) comprising a phosphor. The phosphor has an afterglow emission peak at a temperature above about 100°C and/or has the formula (Sr l- z M z ) 4 Al 14 O 25 :Eu, Ln, X k with M Ɛ {Ca, Ba, Mg}, Ln Ɛ {Dy, Nd}, X Ɛ {Yb, Tm, Sm}.
摘要:
The invention relates to a luminescent material for an light emitting device comprising an (Y,Gd)-containing nanoparticle material linked to at least one organic ligand molecule
摘要:
Light emitting device comprising an excitation energy source to deliver a primary excitation energy and a converting element essentially comprising Eu3+- phosphor material to at least partly convert the primary energy into a secondary radiation whereby in the excitation spectrum of the Eu-comprising phosphor material at 298 K and 1,013 bar the maximum intensity in the wavelength range between ≥ 460 nm to ≤ 470 nm is ≥5% of the maximum intensity in the wavelength range between ≥ 220 nm to ≤ 320 nm. The excitation energy source can be any suitable energy source to excite a secondary light emission such as electron beam sources (e.g. electron guns in CRTs) or light sources such as organic LEDs, inorganic LEDs or laser diodes.