Open AccessPotential of advanced optical concepts in chalcopyrite-based solar cells
Author(s) -
Benjamin Lipovšek,
Janez Krč,
Marko Topič
Publication year - 2010
Publication title -
energy procedia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.474
H-Index - 81
ISSN - 1876-6102
DOI - 10.1016/j.egypro.2010.07.020
Subject(s) - copper indium gallium selenide solar cells , chalcopyrite , tandem , optoelectronics , absorption (acoustics) , reflector (photography) , materials science , wavelength , band gap , optics , solar cell , physics , metallurgy , copper , light source , composite material
The potential of three advanced optical concepts in chalcopyrite-based solar cells is investigated by means of simulations with realistic optical and electrical parameters of state-of-the-art CGS and CIGS cells. First, a monolithically stacked tandem CGS/CIGS structure is analysed, achieving efficiencies up to 20.3% under standard test conditions. Then, in order to reduce the effects of the parasitic sub-bandgap absorption, a wavelength-selective intermediate reflector is incorporated in the tandem, leading to efficiencies up to 20.8%. Finally, the concept of spectrum splitting is tested in a hybrid four-terminal configuration of dislocated CGS and CIGS cells, and efficiencies up to 22.5% are simulated. To indicate further possible improvements, all three concepts are also tested in optically and electrically idealised CGS/CIGS structures, indicating the potential of efficiencies up to 28%
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