Advances in the development of an AlGaAs/GaAs cascade solar cell using a patterned germanium tunnel interconnect
✍ Scribed by R. Venkatasubramanian; M.L. Timmons; T.S. Colpitts; J.S. Hills
- Publisher
- Elsevier Science
- Year
- 1991
- Weight
- 611 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0379-6787
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✦ Synopsis
In this paper, we discuss various aspects of the development of an inverted-grown A1GaAs/ GaAs cascade solar cell incorporating a patterned germanium tunnel junction. Topics include the development of the Alo.3vGao.6~s top cell, the growth of the GaAs bottom cell over the patterned germanium tunnel junction, and a technique for selective removal of thin A1GaAs/GaAs heterostructures after lattice-matched growth on germanium substrates. The problems to be overcome for the achievement of around 30% efficiencies in the A1GaAs/GaAs cascade cell under concentrator applications are also discussed.