43 results about "Quantum cutting" patented technology

The invention provides a quantum clipped transparent electrode for a crystalline silicon solar cell. A doped transparent conductive film provided by the invention can partially contact with metal or heavy doped areas which are distributed in an array mode, thus forming the front or back electrode of the crystalline silicon solar cell. According to the electrode provided by the invention, the spectrum utilization range of the crystalline silicon solar cell is expanded; and the photoelectric conversion efficiency of the battery is greatly improved.

The invention discloses a transparent glass ceramic capable of conversion luminescence under near-infrared quantum cutting. The glass ceramic comprises the following components expressed in mole percent: 30 to 50 mol% of SiO2, 20 to 35 mol% of Al2O3, 5 to 20 mol% of CaCO3, 5 to 20 mol% of NaF, 9.6 to 14.5 mol% of CaF2, 0.1 to 1.0 mol% of EuF3 and 0 to 2 mol% of YbF3. A sample is prepared by using a melt quenching process and subsequent heat treatment; a preparation method for the transparent glass ceramic is simple, produces no pollution and costs little. Coupling of the transparent glass ceramic with a silicon solar cell can hopefully reduce the thermalization effect of the silicon solar cell and improve photoelectric conversion efficiency of the cell.

The invention provides a tungstate near infrared quantum cutting material and a preparation method and an application thereof, and the chemical composition formula of the quantum cutting material is Ca0.99-xWO4:0.01Nd3+, xYb3+, wherein Ca0.99-xWO4 is a substrate; Nd3+ and Yb3+ are doped rare earth ions; x is the molar quantity of the doped rare earth ion Yb3+, and 0.01<=x<=0.3. The preparation method of the quantum cutting material adopts a traditional high temperature solid phase calcining method to synthesize the tungstate near infrared quantum cutting material. The tungstate near infrared quantum cutting material can be excited by visible light of 300-700 nm, and emit high-intensity near infrared light within a range of 900-1500 nm; the light within the wave band can be effectively absorbed by silicon-based solar energy cells, and has calculated quantum efficiency of up to 181%. The tungstate near infrared quantum cutting material is applicable to the preparation of solar energy cells.

The invention discloses a fluorescent transparent inorganic glass converted under far infrared quantum cutting and a preparation method thereof. The fluorescent transparent inorganic glass comprises the following components in mol by percentage, 60-80mol percent of B2O3, 7-15 mol percent of Al2O3, 5-10 mol percent of CaO, 5-10 mol percent of Li2CO3, 0-5 mol percent but not 0 mol percent of CeF3 and 0-10 mol percent but not 0 mol percent of Yb2O3, wherein the total mole content of Al2O3, CeF3 and Yb2O3 is 15 percent. The inorganic glass material can realize high-efficiency converting fluorescence under the excitation of ultraviolet light.

The invention discloses a novel method for improving the efficiency of a Si-film solar cell through quantum cutting. A functional nanometer SiO2 film containing an upper conversion material and a lower conversion material is adopted to increase the absorption of light by the Si-film solar cell, SiO2 sol containing the upper conversion material and the lower conversion material is firstly prepared, then a film with controllable SiO2 particles is prepared through a rotary coating or pulling method, the film can protect a Si film and a Ag or Al metal film from being affected, the upper conversion material and the lower conversion material contained by the film gather infrared light to be visible light, and reduce ultraviolet light to be visible light and infrared light, the infrared light is then converted into visible light through quantum cutting, the light use efficiency of the Si-film solar cell is largely improved, and quantum cutting can be carried out on long-wavelength infrared light and short-wavelength ultraviolet light which can not be absorbed by the solar cell to convert the long-wavelength infrared light and the short-wavelength ultraviolet light into usable visible light. The conversion efficiency of the solar cell is improved, and decrease of the conversion efficiency and performance degradation of the solar cell caused by temperature rise of the cell are avoided at the same time.