Multi-junction solar cell, photoelectric conversion device, and compound-semiconductor-layer lamination structure

US9905719B2 · kind B2 · utility

Assignee

• SONY GROUP CORPORATION · JP

Inventors

• Hiroshi Yoshida · Toyama, JP
• Masao Ikeda · Yokohama, JP
• Shiro Uchida · Rifu, JP
• Takashi Tange · Yokohama, JP
• Masaru Kuramoto · Yokohama, JP
• Masayuki Arimochi · Nagaokakyo, JP
• Hui Yang · Nanhu, CN
• Shulong Lu · Suzhou, CN
• Xinhe Zheng · 安丰镇, CN

Key dates

• Filing date: Sep 3, 2012
• Grant date: Feb 27, 2018
• Expiry date: Sep 21, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/544

Abstract

A multi-junction solar cell that is lattice-matched with a base, and that includes a sub-cell having a desirable band gap is provided. A plurality of sub-cells are laminated, each including first and second compound semiconductor layers. At least one predetermined sub-cell is configured of first layers and a second layer. In each of the first layers, a 1-A layer and a 1-B layer are laminated. In the second layer, a 2-A layer and a 2-B layer are laminated. A composition A of the 1-A layer and the 2-A layer is determined based on a value of a band gap of the predetermined sub-cell. A composition B of the 1-B layer and the 2-B layer is determined based on a difference between a base lattice constant of the base and a lattice constant of the composition A. Thicknesses of 1-B layer and 2-B layer are determined based on difference between base lattice constant and a lattice constant of composition B, and on thickness of the 1-A layer and thickness of 2-A layer.