Recent progress of High-Efficiency III-V multijunction Solar Cells

Author

Lijie Sun ; Mengyan Zhang ; Xin Fang ; Kaijian Chen ; Wei Zhang ; Mengjiong Chen ; Jianfeng Lu

Author_Institution

Center for Photovoltaic Eng., Shanghai Solar Energy Res. Center, Shanghai, China

fYear

2013

fDate

16-21 June 2013

Firstpage

2832

Lastpage

2834

Abstract

High-Efficiency III-V multijunction Solar Cells are being developed at Shanghai Solar Energy Research Center (SSRC) for use in space applications. Recently, Inverted Metamorphic (IMM) 3-Junction cells achieved a 1-sun, AM0 conversion efficiency of 31.88% with an open-circuit-voltage of 2.978V, a short-circuit current-density of 16.94 mA/cm², and a fill factor of 0.863. In addition, GaInP/GaAs/InGaAsP/InGaAs 4-junction solar cells have been prepared by direct wafer bonding (DWB) technique after the epitaxial growth of GaInP/GaAs heterojunction on GaAs substrate and InGaAsP/InGaAs heterojunction on InP substrate, respectively. Moreover, antireflection coating (ARC) has been studied over the range of 300 nm to 1700 nm for 4J solar cells in order to reduce the front surface reflectivity. The latest status of the semiconductor-bonded 4J solar cells and the antireflection coating will also be discussed.

Keywords

III-V semiconductors; antireflection coatings; epitaxial growth; short-circuit currents; solar cells; wafer bonding; 4-junction solar cells; AM0 conversion efficiency; GaInP-GaAs-InGaAsP-InGaAs; Shanghai solar energy research center; antireflection coating; direct wafer bonding technique; epitaxial growth; front surface reflectivity; high-efficiency III-V multijunction solar cells; inverted metamorphic 3-junction cells; open-circuit-voltage; semiconductor-bonded 4J solar cells; short-circuit current-density; voltage 2978 V; Bonding; Gallium arsenide; Indium gallium arsenide; Indium phosphide; Photovoltaic cells; Substrates; Wafer bonding; III-V semiconductor materials; Indium gallium arsenide; Wafer bonding;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th

Conference_Location

Tampa, FL

Type

conf

DOI

10.1109/PVSC.2013.6745061

Filename

6745061