Hitachi Chemical Company, Ltd.

Kaoru Okaniwa

Masato Yoshida

Takeshi Nojiri

Mitsunori Iwamuro

Youichi Machii

Keiko Kizawa

Takehiro Shimizu

Naoki Fukushima

Shuichiro Adachi

Akihiro Orita

Tetsuya Sato

Shuuichirou Adachi

Tetsuya Satou

Takeshi Yamashita

Yoichi Machii

Taku Sawaki

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.

P-type diffusion layer forming composition

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.

Composition for forming N-type diffusion layer, method of forming N-type diffusion layer, and method of producing photovoltaic cell

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.

Composition for forming P-type diffusion layer, method of forming P-type diffusion layer, and method of producing photovoltaic cell

The conductive adhesive film of the invention is a conductive adhesive film for electrical connection between photovoltaic cell surface electrodes and wiring members, which comprises an insulating adhesiveand conductive particlesand has a (t/r) value in the range of 0.75-17.5, where r (&#x3bc;m) is the mean particle size of the conductive particlesand t (&#x3bc;m) is the thickness of the conductive adhesive film, wherein the content of the conductive particlesis 1.7-15.6 vol % based on the total volume of the conductive adhesive film.

Conductive adhesive film and solar cell module

A method for electrically connecting a surface electrode of a solar battery cell and a wiring member via a conductive adhesive film, wherein the conductive adhesive film contains an insulating adhesive and conductive particles, and wherein when the ten point height of roughness profile and maximum height of the surface of the surface electrode in contact with the conductive adhesive film are Rz (&#x3bc;m) and Ry (&#x3bc;m) respectively, the average particle diameter r (&#x3bc;m) of the conductive particles is equal to or greater than the ten point height of roughness profile Rz, and the thickness t (&#x3bc;m) of the conductive adhesive film is equal to or greater than the maximum height Ry.

Connected structure and method for manufacture thereof

The present invention provides a wavelength conversion-type photovoltaic cell sealing material, the sealing material including at least one light emitting layer containing a group of spherical phosphors, the group of spherical phosphors having a ratio of a median value Dof the group of spherical phosphors to a total thickness t of the light emitting layer of from 0.1 to 1.0, where the median value Dis a median value of a volume particle size distribution of the group of spherical phosphors, and an integrated value N of a number particle size distribution from Dto Dof the group of spherical phosphors being 5% or more, when Dis a particle size value at 25% of an integrated value of the volume particle size distribution of the group of spherical phosphors and Dis a particle size value at 75% of the integrated value of the volume particle size distribution of the group of spherical phosphors; and a photovoltaic cell module including the sealing material.

Wavelength conversion-type photovoltaic cell sealing material and photovoltaic cell module using the same

A method of connecting solar battery cells, each provided with a front-face and a back-face electrode, comprises: preparing a wiring member including a strip-like conductive substrate and an adhesive layer provided on one face of the substrate, and bonding the adhesive layer on one end portion of the wiring member with the front-face electrode or the back-face electrode of one cell; turning an other end portion of the wiring member having completed the above preparation, around a central axis along a longitudinal direction so an adhesive layer surface of the other end portion is opposite in orientation to an adhesive layer surface of the one end portion; and then bonding the adhesive layer of the other end portion of the wiring member with an electrode of another solar battery cell having an opposite polarity to the electrode of the one cell previously bonded in the aforementioned preparation process.

Solar battery cell connection method and solar battery module

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.

Method for producing photovoltaic cell

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.

Growing community of inventors

Tsukuba, Japan

Kaoru Okaniwa