Abstract: A wavelength-converting resin composition for a photovoltaic cell, comprising: a fluorescent substance having a maximum absorption wavelength in an absorbance spectrum of which being ?max (nm); resin particles; and a dispersion medium resin, wherein a value of A1 (?), which is represented by the following Equation 1, at the maximum absorption wavelength ?max (nm) is 3.0×10?4 (O.D.

Abstract: A wavelength conversion type photovoltaic cell sealing sheet of the present invention includes a dispersion medium resin, and a fluorescent material having an absorption wavelength peak at from 300 to 450 nm, wherein a content of an ultraviolet absorber other than the fluorescent substance is 0.15 parts by mass or less with respect to 100 parts by mass of the dispersion medium resin. Furthermore, a photovoltaic cell module of the present invention has a photovoltaic cell and the wavelength conversion type photovoltaic cell sealing sheet.

Abstract: The composition for forming an n-type diffusion layer in accordance with the present invention contains a glass powder and a dispersion medium, in which the glass powder includes an donor element and a total amount of the life time killer element in the glass powder is 1000 ppm or less. An n-type diffusion layer and a photovoltaic cell having an n-type diffusion layer are prepared by applying the composition for forming an n-type diffusion layer, followed by a thermal diffusion treatment.

Abstract: The method for producing a photovoltaic cell includes applying, on a partial region of one surface side of a semiconductor substrate, a first n-type diffusion layer forming composition including an n-type impurity-containing glass powder and a dispersion medium; applying, on at least a region other than the partial region on the surface of the semiconductor substrate, a second n-type diffusion layer forming composition which includes an n-type impurity-containing glass powder and a dispersion medium and in which a concentration of the n-type impurity is lower than that of the first n-type diffusion layer forming composition, where the first n-type diffusion layer forming composition is applied; heat-treating the semiconductor substrate on which the first n-type diffusion layer forming composition and the second n-type diffusion layer forming composition are applied to form an n-type diffusion layer; and forming an electrode on the partial region.

Abstract: The composition for forming a composition for forming a p-type diffusion layer, the composition containing a glass powder and a dispersion medium, in which the glass powder includes an acceptor element and a total amount of a life time killer element in the glass powder is 1000 ppm or less. A p-type diffusion layer and a photovoltaic cell having a p-type diffusion layer are prepared by applying the composition for forming a p-type diffusion layer, followed by a thermal diffusion treatment.

Abstract: A spherical phosphor is formed by including a fluorescent substance and a transparent material including the fluorescent substance. In addition, a wavelength conversion-type photovoltaic cell sealing material is formed by including a light transmissive resin composition layer including the spherical phosphor and a sealing resin.

Abstract: The occurrence of internal stress is reduced during the solar cell production process, thereby reducing crystal defects and recombination loss. Provided is a method for producing a solar cell having a p-n junction, which involves a step for forming a p-type layer on a semiconductor substrate by applying a coating liquid for diffusion containing impurity which serves as an acceptor, and by diffusing the impurity by means of thermal diffusion and/or a step for forming an n-type layer on a semiconductor substrate by applying a coating liquid for diffusion containing impurity which serves as a donor, and by diffusing the impurity through a thermal diffusion treatment.

Abstract: Disclosed is a solar cell wherein generation of internal stress is reduced, thereby reducing crystal defects and recombination loss. Specifically disclosed is a solar cell having an antireflective film and an external lead-out electrode on the light-receiving side of a semiconductor substrate that is provided with a p-n junction, while comprising an electrode layer on the non-light-receiving side of the semiconductor substrate. The solar cell is characterized in that the electrode layer is in the form of a solid layer and has a thickness of not more than 5 ?m. It is preferable that the electrode layer has a sheet resistance of not more than 1×10?4 ?/?.

Abstract: Disclosed is a fluorescent material for converting wavelengths used in a light transmitting layer of a solar cell module, by mixing a fluorescent substance and a vinyl compound. Also, disclosed is a resin composition for converting wavelengths by polymerizing the vinyl compound of the fluorescent material for converting wavelengths and then mixing it with a transparent dispersion medium resin. Therefore, there can be provided a fluorescent material for converting wavelengths capable of converting a light that contributes less to solar energy generation in the incident solar radiation, to a wavelength that contributes significantly to energy generation, as well as utilizing the solar radiation efficiently and stably without deteriorating, a resin composition for converting wavelengths and methods for producing thereof.

Abstract: The composition for forming an n-type diffusion layer in accordance with the present invention contains a donor element-containing glass powder and a dispersion medium. An n-type diffusion layer and a photovoltaic cell having an n-type diffusion layer are prepared by applying the composition for forming an n-type diffusion layer, followed by a thermal diffusion treatment.

Abstract: The composition for forming an n-type diffusion layer in accordance with the present invention contains a donor element-containing glass powder and a dispersion medium. An n-type diffusion layer and a photovoltaic cell having an n-type diffusion layer are prepared by applying the composition for forming an n-type diffusion layer, followed by a thermal diffusion treatment.

Abstract: The method for producing a photovoltaic cell includes applying, on a partial region of one surface side of a semiconductor substrate, a first p-type diffusion layer forming composition including a p-type impurity-containing glass powder and a dispersion medium; applying, on at least a region other than the partial region on the surface of the semiconductor substrate, a second p-type diffusion layer forming composition which includes a p-type impurity-containing glass powder and a dispersion medium and in which a concentration of the p-type impurity is lower than that of the first p-type diffusion layer forming composition, where the first p-type diffusion layer forming composition is applied; heat-treating the semiconductor substrate on which the first p-type diffusion layer forming composition and the second p-type diffusion layer forming composition are applied to form a p-type diffusion layer; and forming an electrode on the partial region.

Abstract: The method for producing a photovoltaic cell includes applying, on a partial region of one surface side of a semiconductor substrate, a first n-type diffusion layer forming composition including an n-type impurity-containing glass powder and a dispersion medium; applying, on at least a region other than the partial region on the surface of the semiconductor substrate, a second n-type diffusion layer forming composition which includes an n-type impurity-containing glass powder and a dispersion medium and in which a concentration of the n-type impurity is lower than that of the first n-type diffusion layer forming composition, where the first n-type diffusion layer forming composition is applied; heat-treating the semiconductor substrate on which the first n-type diffusion layer forming composition and the second n-type diffusion layer forming composition are applied to form an n-type diffusion layer; and forming an electrode on the partial region.

Abstract: The method for producing a photovoltaic cell includes applying an n-type diffusion layer forming composition including an n-type impurity-containing glass powder and a dispersion medium onto a first region on one surface side of a semiconductor substrate; applying a p-type diffusion layer forming composition including a p-type impurity-containing glass powder and a dispersion medium onto a second region other than the first region on the surface of the semiconductor substrate where the first region is provided; a thermal diffusion process in which an n-type diffusion layer and a p-type diffusion layer are formed by heat-treating the semiconductor substrate onto which the n-type diffusion layer forming composition and the p-type diffusion layer forming composition are applied; and forming an electrode on each of the first region where the n-type diffusion layer is formed and the second region where the p-type diffusion layer is formed, respectively.

Abstract: In a method for producing a photovoltaic cell, the improvement comprising: 1) coating a portion of a semiconductor substrate with a layer of a composition comprising donor element-containing glass particles and a dispersion medium, and 2) heating the coated semiconductor substrate to a temperature sufficient to cause donor element diffusion from the glass particles into the semiconductor substrate so as to form an n-type diffusion region in the semiconductor substrate.

Abstract: In a method for producing a photovoltaic cell, the improvement comprising: 1) coating a portion of a semiconductor substrate with a layer of a composition comprising acceptor element-containing glass particles and a dispersion medium, and 2) heating the coated semiconductor substrate to a temperature sufficient to cause acceptor element diffusion from the glass particles into the semiconductor substrate so as to form an p-type diffusion region in the semiconductor substrate.

Abstract: The composition for forming a p-type diffusion layer in accordance with the present invention contains an acceptor element-containing glass powder and a dispersion medium. A p-type diffusion layer and a photovoltaic cell having a p-type diffusion layer are prepared by applying the composition for forming a p-type diffusion layer, followed by a thermal diffusion treatment.

Abstract: The composition for forming an n-type diffusion layer in accordance with the present invention contains a donor element-containing glass powder and a dispersion medium. An n-type diffusion layer and a photovoltaic cell having an n-type diffusion layer are prepared by applying the composition for forming an n-type diffusion layer, followed by a thermal diffusion treatment.

Abstract: A photovoltaic (PV) module in which electric power generation efficiency is enhanced by enhancing light utilization rate. A encapsulant (202) is a first layer, a wavelength conversion type light trapping film (300) is a second layer, an antireflection film (104) is a third layer and an n-type layer is a fourth layer. When the refractive indexed of the layers are expressed as first refractive index (n1), second refractive index (n2), third refractive index (n3) and fourth refractive index (n4), the following relation is satisfied; n1?n2?n3?n4. The wavelength conversion type light trapping film (300) of the second layer has one structured surface on the light incident side and has a refractive index of 1.6-2.4. The wavelength conversion type light trapping film is transparent and contains a fluorescent substance.

Abstract: Disclosed is a solar battery cell comprising: a crystalline silicon substrate; a cell electrode for extracting external electric power formed on a light-receiving surface of the crystalline silicon substrate; a front surface tab line connected to the cell electrode; a rear surface electrode formed on a reverse light-receiving surface of the crystalline silicon substrate; and a rear surface tab line connected to the rear surface electrode, wherein the rear surface electrode and the rear surface tab line are connected with a resin conductive paste or conductive film, and the rear surface electrode is uniformly formed on the reverse light-receiving surface of the crystalline silicon substrate. The solar battery cell can improve efficiency of electric power generation and decrease costs for members thereof.