摘要:
In the luminescent screen of a flourescent lamp an organic europium compound is incorporated for converting mercury radiation between 350 nm and 450 nm into red light. The organic europium compound is diluted in an organic polymer. When the fluorescent lamp is dimmed its colour point shifts into the red similar to incandescent lamps and not into the blue.
摘要:
An organic electroluminescent component with a transparent substrate, a first transparent electrode, a mixed layer comprising a light-emitting exciplex formed by a mixture of a hole transporting and electron transporting organic material, and a second electrode, where no further substances are used besides the hole transporting and the electron transporting compounds in which the redox processes serving for the charge transport are reversible, has a low operating voltage accompanied by a high luminance thanks to the simple layer structure. It has a long lifetime.
摘要:
A lighting system includes at least two light-emitting diodes each emitting, in operation, visible light in a preselected wavelength range. A converter converts part of the visible light emitted by one of the diodes into visible light in a further wavelength range so as to optimize the color rendition of the lighting system. The diodes include a blue light-emitting diode and a red light-emitting diode. Further, the converter includes a luminescent material for converting a portion of the light emitted by the blue light-emitting diode into green light.
摘要:
As a white light source, the lighting system (1) has at least three light-emitting diodes (6, 7, 8) for providing visible light at preselected wavelengths. The invention is characterized in that the lighting system (1) is provided with at least one fourth light-emitting diode (9) which, in operation, emits visible light in a further wavelength region, the maximum of the spectral emission of the fourth light-emitting diode (9) lying in the further wavelength region from 575 to 605 nm. Preferably, the further wavelength region ranges from 585 to 600 nm. Preferably, the color rendition of the lighting system (1) is above 60. Preferably, the luminous efficacy of the lighting system (1) is above 30 lm/W, preferably above 40 lm/W. In another preferred embodiment, the color temperature of the lighting system (1) can be adjusted by selectively switching the light-emitting diodes (6, 7, 8, 9).
摘要:
An organic light-emitting diode comprising a laminated structure including, in succession, a substrate layer, a first electrode layer, a layer including a p-conductive material, a layer including a complex compound of terbium with organic ligands, a layer including an n-conductive material and a second electrode, the complex compound of terbium with organic ligands having the following composition: TbL(C2H5OH)2, wherein L=N,N′,N″-Tris-(3-R1—,5-R2-2-X-benzyl)-1,4,7-triazacyclononane, wherein X=—O—, —COO—, R1=CH3, C2H5, C3H7, i-C3H7, t-C4H9, OCH3, OC2H5, OC3H7, OtC4H9, F, Cl, Br, NO2 and R2=CH3, C2H5, C3H7, i-C3H7, t-C4H9, OCH3, OC2H5, OC3H7, OtC4H9, F, Cl, Br, NO2.
摘要:
Illumination system comprising a radiation source and a luminescent material comprising a first phosphor capable of absorbing part of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light; wherein said first phosphor comprises europium(III) as an activator in a host lattice selected from the compounds of an anionic oxygen-containing species with a cationic metal species, comprising yttrium(III) and gadolinium(III). A light-emitting diode as a radiation source is especially contemplated. The invention also relates to a red to amber yellow emitting europium(III)-activated phosphor comprises europium(III) as an activator in a host lattice selected from the compounds of an anionic oxygen-containing species with a cationic metal species, comprising yttrium(III) and gadolinium(III). Furthermore the invention relates to the use of the phosphor for general illumination, traffic and signage lighting, automotive and for backlighting of liquid crystal displays.
摘要:
A gas discharge lamp has two electrodes and a gastight, transparent lamp envelope including a filling gas containing mercury and a phosphor coating. The phosphor coating contains a perylene pigment.
摘要:
A plasma picture screen provided with a luminescent layer which comprises a blue Eu2+-activated phosphor and a UV-C light emitting phosphor. The mixing of an UV-C light emitting phosphor with an Eu2+-activated phosphor or coating of an Eu2+-activated phosphor with a UV-C light emitting phosphor or coating of a base layer of an Eu2+-activated phosphor with a covering layer of a UV-C light emitting phosphor clearly reduces the photodegradation of the Eu2+-activated phosphors in the VUV range.
摘要:
The invention discloses new luminescent materials for use as UV-A phosphors in suntanning lamps. The luminescent materials are of general formula Ca3-xB2P2O11+0.5x:xCe3+ and Ca2.5-xB5.5P2O15.75+0.5x:xCe3+.
摘要翻译:本发明公开了新型发光材料,用作晒黑灯中的UV-A荧光体。 发光材料具有通式Ca 3-x B 2 P 2 O 11 + 0.5x:xCe 3+和Ca 2+ .5-xB 5 .5 P 2 O 15.75 + 0.5x:xCe 3+。