Photovoltaische Zelle aus Verbindungshalbleiter

Details

Veröffentlichungs-Nr.

EP2833413

Aktenzeichen

EP14178623

Anmeldetag

25. Juli 2014

Veröffentlichung

25. Februar 2015

Rechtsraum

EP

IPC

H01L31/0687H01L31/0693H01L31/0304H01L31/18

Abstract

A compound photovoltaic cell includes a first substrate, one or more first photoelectric conversion cells configured to be made of a first compound semiconductor material and to be formed on the first substrate, a tunnel junction layer formed on the one or more first photoelectric conversion cells, and one or more second photoelectric conversion cells configured to be made of a second compound semiconductor material which is lattice mismatched with a material of the first substrate, to be connected to the one or more first photoelectric conversion cells via the tunnel junction layer, and to be disposed on incident side in a light incident direction with respect to the one or more first photoelectric conversion cells, wherein band gaps of the one or more first photoelectric conversion cells and the one or more second photoelectric conversion cells become smaller from an incident side to a back side in a light incident direction, and wherein the tunnel junction layer includes a p-type layer disposed on the incident side and a n-type layer disposed on the back side, the p-type layer being a p<+>-type (Al)GaInAs layer, the n-type layer being an n<+>-type InP layer, an n<+>-type GaInP layer having a tensile strain with respect to InP or n<+>-type Ga(In)PSb layer having a tensile strain with respect to InP.

Anmelder

Firmen

Ricoh Company, Ltd.
Ricoh Company Ltd.

Land

🇯🇵 Japan

Fachgebiete