Photovoltaic device with band-stop filter

US11908963B2 · kind B2 · utility

Assignees

• International Business Machines Corporation · US
• EGYPT NANOTECHNOLOGY CENTER · EG

Inventors

• Wanda Andreoni · Adliswil, CH
• Alessandro Curioni · Thalwil, CH
• Petr Khomyakov · Adliswil, CH
• Jeehwan Kim · White Plains, US
• Devendra K. Sadana · Pleasantville, US
• Nasser D. Afify · Giza, EG

Key dates

• Filing date: May 23, 2013
• Grant date: Feb 20, 2024
• Expiry date: Dec 16, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/548

Abstract

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 ωmin≥0 to an upper limiting angular frequency ωmax where ωmax>ωmin. 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 ωmin<ω*<ωmax. 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.