Kyocera Corporation

Manabu Komoda

Koichiro Niira

Yuusuke Nagou

Takeshi Ito

Hitohiko Nakamura

Yasuhiro Okada

A method for manufacturing a solar cell element is disclosed. The method includes two different etching processes followed by forming a semiconductor layer. A semiconductor substrate having a first conductor type is etched by using a first acid aqueous solution containing hydrofluoric acid, nitric acid, and sulfuric acid. Then, the semiconductor substrate is etched by using a second acid aqueous solution containing hydrofluoric acid and nitric acid with substantially no sulfuric acid to make an uneven surface. A semiconductor layer of second conductivity type different from the first conductivity type is formed on at least a part of the uneven surface of the semiconductor substrate.

Solar cell element manufacturing method, solar cell element, and solar cell module

A solar cell element and method of manufacturing same is disclosed. A reverse-conductive-type layer is formed on at least one part of a first surface side of a one-conductive-type semiconductor substrate. A conductive layer is formed on the reverse-conductive-type layer. A contact region for electrically connecting the conductive layer and the one-conductive-type semiconductor substrate is formed by heating and melting at least one part of the conductive layer. The solar cell element can be manufactured without conducting complicated treatments, such as removal by etching and re-growing of a silicon thin layer.

Growing community of inventors

Omihachimanshi, Japan

Manabu Komoda