Nitto-denko Corporation

Seiki Teraji

Hiroto Nishii

Kazunori Kawamura

Taichi Watanabe

Takashi Minemoto

Kazuhito Hosokawa

Naoyuki Tanaka

Shigenori Morita

Jakapan Chantana

Koya Osuka

An opto-electric hybrid board that sequentially includes an optical waveguide and an electric circuit board toward one side in a thickness direction. The electric circuit board includes a metal supporting layer, an insulating base layer disposed on a one-side surface in the thickness direction of the metal supporting layer, a plurality of conductive layers sequentially disposed at one side in the thickness direction, and an intermediate insulating layer disposed between the conductive layers. At least one layer selected from the group consisting of the metal supporting layer and the conductive layers is electrically insulated from the other layers.

Opto-electric hybrid board

A compound solar cell having a higher conversion efficiency and a method for producing the compound solar cell at lower costs are provided. The compound solar cell includes a CIGS light absorbing layer, a buffer layer and a front side electrode layer provided on a substrate. An interface layer made of a mixed crystal compound having a composition represented by the following general formula is provided between the CIGS light absorbing layer and the buffer layer: Zn(O,S) . . . (1), wherein X is 0.9&#x3c;X&#x2264;1.

Compound solar cell and production method therefor

In order to provide a CIGS compound solar cell with a high conversion efficiency, a CIGS compound solar cell including a rear electrode layer, a CIGS light absorbing layer, a buffer layer, and a transparent electrode layer in this order over a substrate is configured such that the buffer layer comprises a mixed crystal of a Group IIa metal and zinc oxide, and characteristics of the mixed crystal as shown by X-ray diffraction satisfy the following formula (1):0.5&#x2264;/()&#x3c;1&#x2003;&#x2003;(1)(where none of A, B, C are 0)

CIGS compound solar cell

The present invention provides a CIGS film substantially free from oxidation of a front surface thereof and a CIGS solar cell employing the CIGS film and substantially free from reduction and variation in conversion efficiency. The CIGS film, which is used as a light absorbing layer for the CIGS solar cell, includes: a first region having a Ga/(In+Ga) ratio progressively reduced along its thickness toward a predetermined first thickness position from a back surface of the CIGS film; a second region having a Ga/(In+Ga) ratio progressively increased along its thickness toward a predetermined second thickness position from the first region; and a third region provided on the second region and having a Ga/(In+Ga) ratio progressively reduced along its thickness toward the front surface of the CIGS film.

CIGS film, and CIGS solar cell employing the same

A CIGS type compound solar cell excellent in both productivity and conversion efficiency is provided. The CIGS type solar cell includes a CIGS light absorbing layer, a buffer layer and a transparent electrode layer provided in this order on a substrate. The buffer layer is made of a mixed crystal compound containing ZnO, MgO and ZnS being present at specific ranges respectively.

CIGS type compound solar cell

A CIGS film production method is provided which ensures that a CIGS film having a higher conversion efficiency can be produced at lower costs at higher reproducibility even for production of a large-area device. A CIGS solar cell production method is also provided for producing a CIGS solar cell including the CIGS film. The CIGS film production method includes: a stacking step of stacking a layer (A) containing indium, gallium and selenium and a layer (B) containing copper and selenium in a solid phase in this order over a substrate; and a heating step of heating a stacked structure including the layer (A) and the layer (B) to melt a compound of copper and selenium of the layer (B) into a liquid phase to thereby diffuse copper from the layer (B) into the layer (A) to permit crystal growth to provide a CIGS film.

Growing community of inventors

Ibaraki, Japan

Seiki Teraji