1302.4752 (A. Kechiantz et al.)

Tuning up the performance of GaAs-based solar cells by inelastic
scattering on quantum dots and doping of AlyGa1-ySb type-II dots and
AlxGa1-xAs spacers between dots    [PDF]

A. Kechiantz, A. Afanasev

We used AlGaSb/AlGaAs material system for a theoretical study of photovoltaic performance of the proposed GaAs-based solar cell in which the type-II quantum dot (QDs) absorber is spatially separated from the depletion region. Due to inelastic scattering of photoelectrons on QDs and proper doping of both QDs and their spacers, concentrated sunlight is predicted to quench recombination through QDs. Our calculation shows that 500-sun concentration can increase the Shockley-Queisser limit from 35% to 40% for GaAs single-junction solar cells.

View original: http://arxiv.org/abs/1302.4752