Si nanowire array solar cells with efficient wide-angle photovoltaic conversion

The efficient Si/conducting polymer of poly(3, 4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) core/shell nanowire array solar cells have been fabricated by metal-assisted Si chemical etching followed by a PEDOT:PSS solution filling and drying process. The power conversion efficiency (PCE) of the hybrid solar cell is independent of incident intensity and reaches 6.8%. The wide-angle photovoltaic conversion property is characterized by changing incident angle. The conversion efficiency with the incident angle less than 45° is only reduced by 12% compared with under nromal incidance. The hybrid solar cells show excellent wide-angle photovoltaic conversion performance.