Photo characteristics of solar cells with and without the postdeposition () treatment for the window layer.
Spectral response of solar cells with and without the postdeposition treatment for the window layer.
Fitted real-part and imaginary-part of dielectric functions of films with and without treatment. Four fitted parameters (in ), , , and (in ) are included.
Comparison of spectra between as-grown -thick and the same film after the .
Band diagram that explains the increase in the built-in potential by the in situ for the window layer in the solar cell. The value denotes a potential difference at the interface originating from the UTA. The value describes the band lift arising from the Fermi level location of the window layer closer to the valence band edge of the absorber. The gray-colored ultrathin contaminant layer acts as a buffer layer reducing the recombination loss at the interface.
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