58 results about "Luminescent solar concentrator" patented technology

A first aspect of the invention relates to a luminescent object comprising an aligned polymer that contains an oriented photoluminescent material, said aligned polymer having a pretilt angle of 10-90°. The luminescent object according to the present invention may advantageously be employed in luminescent solar concentrator systems as it enables highly efficient transportation of radiation emitted by the photoluminescent material following exposure to incident solar light. Another aspect of the invention concerns a photovoltaic device comprising an electromagnetic radiation collection medium containing the aforementioned luminescent object and a photovoltaic cell capable of converting optical radiation to electrical energy which is optically coupled to the luminescent object. Further aspects of the invention include a fluorescent light activated display and a room lighting system comprising the aforementioned luminescent object.

A luminescent solar concentrator comprises a primary waveguide and at least one photovoltaic cell. The primary waveguide has a curved surface which concentrates light on a perimeter. The photovoltaic cell is oriented at the perimeter so that it can both receive the concentrated light and receive direct light as well. A back sheet may be provided that provides structural support and protection. The perimeter may have the shape of a polygon where a photovoltaic cell is oriented along each edge. Modules and arrays of such units are also disclosed.

Luminescent solar concentrator (LSC) comprising at least one disubstituted benzoselenadiazole compound having general formula (I): R1, R2, R3, R4 and R5, equal to or different from each other, represent a hydrogen atom; or they are selected from linear or branched C1-C20, preferably C1-C10, alkyl groups, cycloalkyl groups optionally substituted, aryl groups optionally substituted, linear or branched C1-C20, preferably C1-C10, alkoxyl groups, optionally substituted; or R1 and R2, can be possibly bound to each other so as to form, together with the carbon atoms to which they are bound, a cycle or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, saturated, unsaturated, or aromatic, possibly containing one or more heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; or R3 and R4, can be possibly bound to each other so as to form, together with the carbon atoms to which they are bound, a cycle or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, saturated, unsaturated, or aromatic, possibly containing one or more heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; or R4 and R5, can be possibly bound to each other so as to form, together with the carbon atoms to which they are bound, a cycle or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, saturated, unsaturated, or aromatic, possibly containing one or more heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium.(img file=DPA0000183055600000011.tif wi=970 he=408 / ).

The invention provides a lighting device comprising a first luminescent concentrator further using a second luminescent material of another composition alongside the first luminescent concentrator (especially no optical contact and / or optically separated using a dichroic mirror). Especially, this second material has an absorption band overlapping with the emission band of the first material. As a consequence a significant part of the light generated by the first luminescent material will be absorbed by the second material resulting in a high brightness white source with increased efficiency.

A luminescent solar concentrator apparatus includes an optically transparent substrate and a photovoltaic material layer at least partially embedded within an optically transparent encapsulant material layer that contacts the optically transparent substrate. A luminescent material layer also contacts the optically transparent encapsulant material layer. Generally, the luminescent solar concentrator apparatus provides that the luminescent material layer is not located within an incoming optical pathway through at least the optically transparent substrate to the photovoltaic material layer.

Process for the preparation of a benzohetero [1, 3] diazole compound disubstituted with heteroaryl groups which comprises reacting at least one benzohetero [1, 3] diazole compound disubstituted with at least one heteroaryl compound. Said benzohetero [1, 3] diazole compound disubstituted with heteroaryl groups can be advantageously used in the construction of luminescent solar concentrators (LSC). Furthermore, said benzohetero [1, 3] diazole compound disubstituted with heteroaryl groups can be advantageously used in the construction of photovoltaic devices such as, for example, photovoltaic cells, photovoltaic modules, solar cells, solar modules, on both a rigid and flexible support. Said benzohetero [1, 3] diazole compound disubstituted with heteroaryl groups can also be advantageously used as a precursor of monomeric units in the preparation of semiconductor polymers.

The invention discloses an inorganic fluorescent powder material co-doped with transition metal Cr<3+> and rare earth Er<3+> ions, and the chemical general formula of the inorganic fluorescent powdermaterial is La<3(1-x)>Er<3x>Ga<5.5(1-y)>Cr<5.5y>Nb<0.5>O<14>, wherein x is greater than 0 and less than or equal to 0.07, and y is equal to 0.005. The invention also provides a preparation method of the fluorescent powder. According to the invention, a high-temperature solid-phase method is used to synthesize a Cr<3+> and Er<3+> co-doped La3Ga5.5Nb0.5O14 inorganic fluorescent powder material; tests are carried out by instruments such as X-ray powder diffraction XRD, transient / steady state fluorescence spectrum FL and the like; and the result shows that the synthesized fluorescent powder has the fluorescent characteristics of almost covering full-wave band of visible light absorption and high-efficiency emission of near-infrared light of 1536 nm. Moreover, the doped matrix La3Ga5.5Nb0.5O14has excellent thermal stability and chemical stability, so that the novel transition metal wide-spectrum sensitized rare earth ion fluorescent powder can be suitable for high-efficiency stable fluorescent dyes in luminescent solar concentrators (LSC).

A solar concentrator device comprising a solar concentrator element comprising a radiation transmissive surface, a radiation absorptive material and a radiation concentrating / collection point and disposed on the incident radiation side thereof a recapture element for recapturing at least a portion of radiation lost from the concentrator element has improved solar radiation collection efficiency by reintroducing recaptured radiation into the concentrator element or by propagating said recaptured radiation through the recapture element to a radiation concentration point associated with the recapture element. It has been found that planar elements having a grooved or corrugated outer surface make for very good recapture elements for planar concentrator elements.

A luminescent concentrator for solar light is provided. The luminescent concentrator comprises a wavelength-selective filter, an energy concentrating area, and a luminescent material. The wavelength-selective filter is adapted to pass the solar light and to reflect light emitted by the luminescent material. Further, a method for concentrating solar light is provided. The method comprises the steps of (a) passing incident solar light through a wavelength-selective filter and an energy concentrating area onto a luminescent material, and (b) converting the incident solar light in the luminescent material to light having a wave-length reflectable by the wavelength-selective filter. The method further comprises a step (c) of concentrating the converted light in a pre-determined area arranged between the wavelength-selective filter and the luminescent material.