Characteristics of Al0.36Ga0.64As/GaAs tandem solar cells with pp(-)n(-)n structural AlGaAs solar cells

Authors
Takahashi, K Yamada, S Minagawa, Y Unno, T
Citation
K. Takahashi et al., Characteristics of Al0.36Ga0.64As/GaAs tandem solar cells with pp(-)n(-)n structural AlGaAs solar cells, SOL EN MAT, 66(1-4), 2001, pp. 517-524
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
SOLAR ENERGY MATERIALS AND SOLAR CELLS
ISSN journal
09270248 → ACNP
Volume
66
Issue
1-4
Year of publication
2001
Pages
517 - 524
Database
ISI
SICI code
0927-0248(200102)66:1-4<517:COATSC>2.0.ZU;2-T
Abstract
Characteristics of Al0.36Ga0.64As/GaAs tandem solar cells with new type pp( -)n(-)n structural AlGaAs top cells are reported. A tunnel junction consist ing of a p(+)-GaAs layer and an n(+)-Al0.15Ga0.85As layer is used for the i nterconnection. This brings about a good result on two critical points: the light absorption and the degradation of current-voltage (I-V) characterist ics by heat treatment during the growth of the AlGaAs cell structure. A tan dem solar cell design focusing on the current matching between the top and bottom cells leads to a 27.6% efficiency with a fabricated Al0.36Ga0.64As/G aAs tandem solar cell under 1 sun, AM 1.5 global conditions. (C) 2001 Elsev ier Science B.V. All rights reserved.