LED Light Soaking Source for Photovoltaic Cells

The patent divides the broad-spectrum radiation into multiple discrete wavelength bands (300-550 nm, 600-650 nm, 700-1100 nm) using separate LED arrays. This segmentation allows selective excitation of different layers without excessive heating, as each wavelength band is optimized for specific absorption characteristics of particular cell components.

Different wavelength ranges are directed at different regions or layers of the photovoltaic cell. The 300-550 nm range targets the amorphous silicon emitter, 600-650 nm targets the crystalline silicon substrate, and 700-1100 nm targets the passivation layers. This localized quality approach ensures each layer receives optimal radiation for its specific improvement without unnecessary heating from non-absorbed wavelengths.

The patent changes the spectral parameters of the radiation source by using multiple LED arrays with specific wavelength ranges instead of a single broad-spectrum source. This allows optimization of irradiance levels for each wavelength band, delivering high total irradiance (≥200 kW/m²) while keeping individual band intensities within safe limits for passivation layer integrity.

The patent employs multiple LED arrays that can operate simultaneously or in sequence, providing continuous useful radiation action across different wavelength bands. This maintains high productivity through sustained treatment while the distributed spectral approach prevents concentration of damaging energy on any single layer.