High-Efficiency Monolithic Three-Terminal GaAs/Si Tandem Solar Cells Fabricated by Metalorganic Chemical Vapor Deposition

1 February 1996

journal article
Published by IOP Publishing in Japanese Journal of Applied Physics

Vol. 35 (2S) , 1401
https://doi.org/10.1143/jjap.35.1401

Abstract

A monolithic GaAs/Si tandem solar cell which consists of a p⁺-n GaAs top cell and an n⁺-p-p⁺ Si bottom cell is fabricated by metalorganic chemical vapor deposition. The conversion efficiency of the top cell is increased by improvement of the solar cell structure (adoption of a graded band emitter layer) and optimization of the growth conditions (increase of the thermal annealing temperature and the growth temperature). By combining the conversion efficiencies of the GaAs top cell (16.0%) and Si bottom cell (3.9%), the active-area conversion efficiency of 19.9% (AM0, 1 sun) has been obtained in the three-terminal configuration.

Keywords

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