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Proceedings Paper

High-efficiency commercial grade 1cm2 AlGaInP/GaAs/Ge solar cells with embedded InAs quantum dots for concentrator demonstration system
Author(s): J. F Wheeldon; C. E. Valdivia; D. Masson; F. Proulx; B. Riel; N. Puetz; E. Desfonds; S. Fafard; B. Rioux; A. J. SpringThorpe; R. Arès; V. Aimez; M. Armstrong; M. Swinton; J. Cook; F. Shepherd; T. J Hall; K. Hinzer
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Paper Abstract

Triple-junction AlGaInP/InGaAs/Ge solar cells with embedded InAs quantum dots are presented, where typical samples obtain efficiencies of > 40% under AM1.5D illumination, over a range of concentrations of 2- to 800-suns (2 kW/m2 to 800 kW/m2). Quantum efficiency measurements show that the embedded quantum dots improve the absorption of the middle subcell in the wavelength range of 900-940 nm, which in turn increases the overall operating current of the solar cell. These results are obtained with 1 cm2 solar cells, and they demonstrate the solar cells' low series resistance, which and makes them ideal for the current generation in commercial concentrator systems. The thermal management and reliability of the solar cell and carrier is demonstrated by testing the experimental samples under flash (up to 1000-suns) solar simulator and continuous (up to 800-suns) solar simulator. Under continuous solar illumination, the solar cell temperature varies between ~Δ3°C at 260-suns linearly to ~Δ33°C at 784-suns when the solar cell is mounted with thermal paste, and ~Δ27°C at 264-suns linearly to ~Δ91°C at 785-suns when no thermal paste is used. The solar cells experience the expected shift in open circuit voltage and efficiency due to temperature, but otherwise operate normally for extended periods of time.

Paper Details

Date Published: 22 September 2010
PDF: 9 pages
Proc. SPIE 7750, Photonics North 2010, 77502Q (22 September 2010); doi: 10.1117/12.872890
Show Author Affiliations
J. F Wheeldon, Univ. of Ottawa (Canada)
C. E. Valdivia, Univ. of Ottawa (Canada)
D. Masson, Cyrium Technologies Inc. (Canada)
F. Proulx, Cyrium Technologies Inc. (Canada)
B. Riel, Cyrium Technologies Inc. (Canada)
N. Puetz, Cyrium Technologies Inc. (Canada)
E. Desfonds, Cyrium Technologies Inc. (Canada)
S. Fafard, Cyrium Technologies Inc. (Canada)
B. Rioux, National Research Council Canada (Canada)
A. J. SpringThorpe, National Research Council Canada (Canada)
R. Arès, Univ. de Sherbrooke (Canada)
V. Aimez, Univ. de Sherbrooke (Canada)
M. Armstrong, National Research Council Institute for Research in Construction (Canada)
M. Swinton, National Research Council Institute for Research in Construction (Canada)
J. Cook, OPEL Solar Inc. (United States)
F. Shepherd, National Research Council Canada (Canada)
T. J Hall, Univ. of Ottawa (Canada)
K. Hinzer, Univ. of Ottawa (Canada)


Published in SPIE Proceedings Vol. 7750:
Photonics North 2010
Henry P. Schriemer; Rafael N. Kleiman, Editor(s)

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