Sanyo Electric Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Yasuko Hirayama

Takeshi Sano

Takahiro Mishima

Jian Li

Hiroyuki Fujii

Masato Shigematsu

Taiki Hashiguchi

Mamoru Arimoto

Takahisa Sakakibara

Kazunori Fujita

Kenichirou Wakisaka

Koichi Kubo

The solar cell () of the present invention is provided with an n-side electrode (), a p-side electrode (), and a photoelectric conversion unit () having a first main surface () and a second main surface (). The first main surface () includes an n-type surface () and a p-type surface (). The photoelectric conversion unit () has a semiconductor substrate () and a semiconductor layer (). The semiconductor substrate () has first and second main surfaces (). The semiconductor layer () is arranged on a portion of the first main surface (). The semiconductor layer () constitutes either the n-type surface () or the p-type surface (). The semiconductor layer () includes a relatively thick portion () and a relative thin portion (). The n-side electrode () or the p-side electrode () is arranged on at least the relatively thin portion () of the semiconductor layer (). The solar cell of the present invention, by means of the aforementioned configuration, is able to extend the lifetime of the minor carriers by means of the relatively thick portion (), to maintain low resistance between the semiconductor substrate () and the n-side electrode () by means of the relatively thin portion (), and to increase hole and electron collection efficiency.

Solar cell

A manufacturing includes forming an insulating layer covering a portion of a first semiconductor layer on a semiconductor substrate, removing a portion of the first semiconductor layer which is not covered with the insulating layer with an etchant to expose a potion of the first main surface, and cleaning the first main surface using a cleaning liquid containing hydrofluoric acid. An etching rate by the etchant to etch the first semiconductor layer is higher than an etching rate by the etchant to etch a first surface layer of the insulating layer, the first surface layer being on the side opposite to the first semiconductor layer. An etching rate by the cleaning liquid to etch a second surface layer of the insulating layer, the second surface layer being on the first semiconductor layer side, is lower than an etching rate by the cleaning liquid to etch the first surface layer.

Method of manufacturing solar cell

An organic semiconductor material comprising an amine unit having a secondary or tertiary amine structure and a thiophene unit having a thiophene ring structure and preferably the amine unit has the following structure: wherein R, R, and Rindependently represent hydrogen, an optionally substituted alkyl group, an optionally substituted alkoxy group, an optionally substituted ether group, or an optionally substituted aryl group and may be same or different from each other.

Organic semiconductor material, organic semiconductor element and field effect transistor using the same

An organic electroluminescent device comprises a plurality of stacked layers of polymeric materials soluble in an organic solvent. As a polymeric material forming a lower layer, a polymeric material is selected having a molecular weight greater than the molecular weight of a polymeric material of a layer to be formed on the lower layer. As an organic solvent for dissolving the polymeric material forming the lower layer, an organic solvent is selected having a dielectric constant greater than the dielectric constant of an organic solvent for dissolving the polymeric material forming an upper layer. With a light emitting layer being the lower layer and an electron transport layer being the upper layer, it is preferable that the electron transport layer includes a polymeric material having hole blocking property. With a light emitting layer being the lower layer and an electron transport layer being the upper layer, it is preferable that the repeating unit of the polymeric material forming the light emitting layer and the repeating unit of the polymeric material forming the electron transport layer include the same chemical structure.

Organic electroluminescent device and method for manufacturing same

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Kobe, Japan

Yasuko Hirayama