Solar Frontier K.k.

Renesas Electronics Corporation

International Business Machines Corporation

Oki Electric Industry Co., Ltd.

Ykk Corporation

Japan Aerospace Exploration Agency

Showa Shell Sekiyu K.k.

Hiroki Sugimoto

Homare Hiroi

Jeehwan Kim

Oki Gunawan

David Brian Mitzi

Hideki Hakuma

Kenji Horiguchi

Kichung Kim

Koji Kubota

Kenji Hasegawa

Yoshiaki Tanaka

Takuro Sato

Atsushi Fukasawa

Yumi Takizawa

Takuya Morimoto

Masashi Kondou

Ikuo Kawasumi

Kenji Ogami

Keisuke Ishikawa

Noriyuki Sakai

Michio Tajima

Yasuaki Iwata

Fumio Urabe

An active period that is expressed by a range of a count value t[x] and is a period during which communication of a packet with an outside is permitted and an inactive period that is expressed by a range of the count value t[x] and is a period during which communication of a packet with an outside is prohibited are defined in schedule data. A wireless communication interface communicates a packet with the outside during the active period. A power supply controller cuts off power supplied to the wireless communication interface during the inactive period. A synchronous controller updates a count value of a counter based on a synchronous data value in the received packet during a reception operation of the packet, define the synchronous data value based on the updated count value t[y] during a transmission operation of the packet, and store it in the packet to be transmitted.

Wireless communication device and wireless communication system

An object of the present invention is to provide a terminal authentication device that can suppress a troublesome operation to authenticate a terminal when the terminal is connected to a network. A reception unit receives a beacon signal broadcasted from a terminal. A position determination unit determines the position of the terminal using the received beacon signal. A connection control unit controls the terminal to be connected to a mesh network in the case where the determined position of the terminal is within a predetermined authentication possible region.

Terminal authentication device, terminal authentication system, and terminal authentication method

A photovoltaic device includes an absorber layer having a back contact formed on the absorber layer, the back contact having an exposed surface free from a substrate. It further includes a top contact formed in contact with a transparent conductive layer opposite the back contact and a stressor layer forming a superstrate on the absorber layer opposite the back contact.

Substrate-free thin-film flexible photovoltaic device and fabrication method

A method for thermal exfoliation includes providing a target layer on a substrate to form a structure. A stressor layer is deposited on the target layer. The structure is placed in a temperature controlled environment to induce differential thermal expansion between the target layer and the substrate. The target layer is exfoliated from the substrate when a critical temperature is achieved such that the target layer is separated from the substrate to produce a standalone, thin film device.

A thin-film solar cell comprising a substrate, a first electrode layer arranged upon the substrate, a p-type light absorption layer formed by a group I-III-IVcompound arranged upon the first electrode layer, and an n-type second electrode layer arranged upon the p-type light absorption layer. The p-type light absorption layer includes Cu as a group 1 element and includes Ga and In as group III elements. The ratio of the atomic number between Cu and the group III elements in the entire p-type light absorption layer is lower than 1.0; the ratio of the atomic number between Ga and the group III elements in the surface on the second electrode layer side is no more than 0.13; and the ratio of the atomic number between Cu and the group III elements in the surface on the second electrode layer side is at least 1.0.

Thin-film solar cell and production method for thin-film solar cell

A method for manufacturing a thin-film solar cell module includes a rear surface electrode layer deposition step for depositing a rear surface electrode layer on a substrate, an alkali metal adding step for adding an alkali metal to the rear surface electrode layer, a light absorbing layer deposition step for depositing a light absorbing layer on the rear surface electrode layer, a division groove forming step for forming a division groove that divides the light absorbing layer and exposing a front surface of the rear surface electrode layer in the division groove, an alloying step for alloying the rear surface electrode layer and the alkali metal on the front surface of the rear surface electrode layer exposed in the division groove, and a transparent conductive film deposition step for depositing a transparent conductive film on the light absorbing layer and in the division groove.

Thin-film solar cell module and method for manufacturing the same

In the present invention, in order to achieve a point contact, a thin film solar cell has a thin film light absorbing layer () disposed between a transparent conducive film () and a back-side metal electrode layer (), and at the interface between the back-side metal electrode layer () and the light absorbing layer (), the thin film solar cell is provided with a nanoparticle dispersion layer () including nanoparticles (), where at least the surface of the nanoparticles is an insulator.

Thin film solar cell and manufacturing method therefor

A CIS-based thin film solar cell has a backside electrode layer that is divided by a pattern (P), and a CIS-based light absorption layer, and a transparent conductive film are sequentially formed on a substrate. The backside electrode layer comprises an intermediate layer on the surface that is in contact with the CIS-based light absorption layer, the intermediate layer being composed of a compound of a metal that constitutes the backside electrode layer and a group VI element that constitutes the CIS-based light absorption layer; the intermediate layer comprises a first intermediate layer portion which is formed on the upper surface and a second intermediate layer portion which is formed on the lateral surface that and faces the pattern (P); and the film thickness of the second intermediate layer portion is larger than the film thickness of the first intermediate layer portion.

CIS-based thin film solar cell

A compound-based thin film solar cell which has a high photovoltaic conversion efficiency is obtained. The compound-based thin film solar cell is provided with substrate (), back surface electrode layer () formed on substrate (), p-type light absorption layer () formed on back surface electrode layer (), n-type high resistance buffer layer () formed on p-type light absorption layer (), and ZnO film () formed on n-type high resistance buffer layer (), where n-type high resistance buffer layer () includes a first buffer layer (A) formed on the p-type light absorption layer () and a second buffer layer (B) formed on the first buffer layer (A) and where the second buffer layer (B) is formed by a material which has a lattice constant closer to the lattice constant of the ZnO film () than the first buffer layer (A).

Compound-based thin film solar cell

In a wireless communication device for performing plural wireless communications with different standards using the same frequency band, degradation of communication quality and communication speed due to communication interference is prevented, while drop in throughput and occurrence of frame loss are prevented. A first wireless communication section first performs wireless communication using a first frequency band and a second wireless communication section performs second wireless communication using a second frequency band with which at least a part of the first frequency band overlaps. The first wireless communication section analyzes a communication status signal which represents a signal pattern corresponding to communication status of the second wireless communication and then determines whether it is synchronous communication, and if it is, the first wireless communication section transmits/receives data in a non-communication period when communication in the synchronous communication is not performed, in synchronization with timing of the synchronous communication.

Wireless communication device

Disclosed is a thin-film solar cell which has a high photoelectric conversion efficiency and is provided with a substrate (), a backside surface electrode layer () formed on the substrate (), a p-type light-absorbing layer () formed on the backside surface electrode layer (), and an n-type transparent conductive film () formed on the p-type light-absorbing layer (). Voids () are formed at the interface of the backside surface electrode layer () and the p-type light-absorbing layer ().

Thin film solar cell

To improve a quality of a combined signal obtained by maximum ratio combining performed when a transmission signal of OFDM system is diversity-received with a small computation amount or a small circuit size. In a receiving apparatus, a combining unit corrects, when combining a sub-carrier signal of each branch obtained by performing Fourier transform on a reception signal of each branch at a maximum ratio for each sub-carrier, a weighting coefficient of each branch according to a magnitude relation of an intensity of the reception signal of each branch before Fourier transform. Specifically, the combining unit corrects the weighting coefficient of each branch so as to weaken an influence of a transmission path response estimated for a sub-carrier signal of the branch in branches with smaller reception signal intensities.

Growing community of inventors

Tokyo, Japan

Hiroki Sugimoto