Studies from University of Ottawa Yield New Data on Photoenergy (Inverted Metamorphic III-V Triple-Junction Solar Cell with a 1 eV CuInSe2 Bottom Subcell)
By a News Reporter-Staff News Editor at Energy Weekly News -- Investigators publish new report on Photoenergy. According to news reporting originating in Ottawa, Canada, by VerticalNews journalists, research stated, "A new triple-junction solar cell (3J) design exploiting the highly absorptive I-III-VI chalcopyrite CuInSe2 material is proposed as an alternative to III-V semiconductor 3J solar cells. The proposed structure consists of GaInP (1.9 eV)/Ga(In) As (1.4 eV)/CuInSe2 (1 eV) which can be grown on a GaAs substrate in an inverted manner using epitaxial lift-off techniques."
The news reporters obtained a quote from the research from the University of Ottawa, "To lattice-match epitaxial CuInSe2 to Ga(In) As, a compositionally graded buffer region composed of GaxIn1-xP is used. The modeling and simulation of the device include the effects of threading dislocations on minority carrier lifetimes in the metamorphic buffer and bottom subcell active region. Studies focus on device performance under standard testing conditions and concentrated illumination. The results are compared to a reference lattice mismatched 3J composed of GaInP (1.9 eV)/Ga(In) As (1.4 eV)/GaInAs(1 eV) and to a lattice matched 3J composed of GaInP (1.9 eV)/Ga(In) As (1.4 eV)/Ge (0.67 eV). The advantage of CuInSe2 is its higher absorption coefficient, which requires only 1 mu m of active material compared to 4 mu m of GaInAs in the bottom subcell of the reference lattice mismatched cell."
According to the news reporters, the research concluded: "The proposed design reaches an efficiency of 32.6% under 1 sun illumination at 300K with 10(5) cm(-2) threading dislocations and 39.6% at 750 suns."
For more information on this research see: Inverted Metamorphic III-V Triple-Junction Solar Cell with a 1 eV CuInSe2 Bottom Subcell. International Journal of Photoenergy, 2014;():1-10. International Journal of Photoenergy can be contacted at: Hindawi Publishing Corporation, 410 Park Avenue, 15TH Floor, #287 Pmb, New York, NY 10022, USA. (Hindawi Publishing - www.hindawi.com; International Journal of Photoenergy - www.hindawi.com/journals/ijp/)
Our news correspondents report that additional information may be obtained by contacting A.W. Walker, University of Ottawa, SUNLAB, Ottawa, ON K1N 6N5, Canada. Additional authors for this research include F. Bouchard, A.H. Trojnar and K. Hinzer.
Keywords for this news article include: Ottawa, Canada, Ontario, Solar Cell, Photoenergy, North and Central America
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC