Frequency response of the external quantum efficiency in multijunction solar cells
Nicolas Marquez Peraca, D T. Bilir, Behrang Hamadani
The frequency dependence of the external quantum efficiency (EQE) of high-quality multijunction solar cells was examined by the modulated photocurrent spectroscopy method via an optical setup comprised of a light-pipe-coupled compact LED array. The optical excitation was achieved through sinusoidal electrical modulation of an appropriate LED by a custom-designed, high bandwidth amplifier. We observed very unique features in the amplitude and phase data of the EQE frequency sweeps that are very sensitive to various subcell parameters. These features are discussed extensively within the context of an AC equivalent circuit model.
Marquez Peraca, N.
, Bilir, D.
and Hamadani, B.
Frequency response of the external quantum efficiency in multijunction solar cells, Optics Express, [online], https://doi.org/10.1364/OE.25.00A709
(Accessed March 5, 2024)