Transparent WOx window layers for silicon based heterojunction solar cells
04 Pubblicazione in atti di convegno
Menchini Francesca, Serenelli Luca, Martini Luca, Albano Andrea, Mangiapane Pietro, Salza Enrico, Stracci Glauco, de Cesare Giampiero, Caputo Domenico, Tucci Mario
The fabrication of window layers more transparent than those based on amorphous silicon (a-Si:H) could be a key factor to enhance the efficiency of heterojunction (HJ) solar cells. In this work amorphous hydrogenated silicon oxide (a-SiOx:H) as a transparent passivating layer and substoichiometric tungsten oxide (WOx), with its wide band gap and high work function, are proposed to form efficient hole-selective contacts on silicon-based HJ solar cells. A comparison is made between WOx films grown by RF sputtering and by thermal evaporation.