Abstract: In the present invention a new solar photovoltaic module is proposed comprising a solar cell comprising a silicon layer having a first surface and a second surface opposite to said first surface. The solar cell further comprises a passivating layer stack comprising a heterogeneous layer arranged on said first surface and/or on said second surface. The heterogeneous layer, having a back surface and a front surface, comprises a non-conducting matrix having a refractive index being lower than 3.0. The heterogeneous layer further comprises inclusions of at least one conductive material in said matrix, and at least some of said inclusions extend from said back surface to said front surface of the heterogeneous layer for electrically connecting the surfaces of the heterogeneous layer.