CIGS-BASED HIGH-EFFICIENCY BIFACIAL-TRANSMISSION SOLAR CELL WITH GALLIUM OXIDE PASSIVATION LAYER INSERTED THEREINTO AND MANUFACTURING METHOD THEREOF AND BUILDING-INTEGRATED PHOTOVOLTAIC MODULE USING SAME AND TANDEM SOLAR CELL THEREOF

摘要

The present invention relates to a CIGS-based high-efficiency bifacial-transmission solar cell with a Ga_2O_3 passivation layer inserted thereinto comprising: a lower substrate of a transparent material; a lower transparent electrode layer of a transparent conductive oxide material formed on the lower substrate; metal nanoparticles dispersed on the lower transparent electrode layer; a passivation layer of a Ga_2O_3 material formed on the lower transparent electrode layer on which the metal nanoparticles are dispersed to prevent back surface recombination; a light absorbing layer of a CIGS-based material formed on the passivation layer; an upper buffer layer formed on the light absorbing layer; and an upper transparent electrode layer formed on the upper buffer layer. The light absorbing layer forms a localized contact by coming in contact with the metal nanoparticles exposed on the surface of the passivation layer. A Ga_2O_3 layer is used as a passivation layer and a lower transparent electrode and a light absorbing layer form a localized contact to prevent back surface recombination and efficiently connect the lower transparent electrode and the light absorbing layer to increase efficiency of the solar cell.;COPYRIGHT KIPO 2019