International Business Machines Corporation

Egypt Nanotechnology Center

Petr Khomyakov

Devendra K Sadana

Jeehwan Kim

Alessandro Curioni

Wanda Andreoni

Augustin J Hong

Ahmed Abou-Kandil

Nasser D Afify

Nasser Afify

Photovoltaic device with band-stop filter. The photovoltaic device includes an amorphous photovoltaic material and a band-stop filter structure having a stopband extending from a lower limiting angular frequency ω≥0 to an upper limiting angular frequency ωwhere ω>ω. The band-stop filter structure is arranged in the photovoltaic device relative to the photovoltaic material in order to attenuate electromagnetic radiations reaching the photovoltaic material with angular frequencies of ω* in the stopband, so that ω<ω*<ω. The angular frequencies ω* correspond to electronic excitations ℏω* from valence band tail (VBT) states of the amorphous photovoltaic material to conduction band tail (CBT) states of the amorphous photovoltaic material.

Photovoltaic device with band-stop filter

A method of producing a photovoltaic device includes providing a stretchable substrate for the photovoltaic device; and stretching the substrate to produce a stretched substrate. The method further includes depositing a structure comprising hydrogenated amorphous silicon onto the stretched substrate; and subjecting the deposited hydrogenated amorphous silicon structure and the stretched substrate to a compressive force to form a compressively strained photovoltaic device.

Silicon: hydrogen photovoltaic devices, such as solar cells, having reduced light induced degradation and method of making such devices

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Adliswil, Switzerland

Petr Khomyakov