Patent ID: 8945972
Filing Date: 2015-02-03
Classification: H01L,Y02E

Abstract:
1. A method of producing a layered system for use in a solar cell comprising the subsequent steps of: (a) providing a mild steel substrate with a protective coating layer and with a polymer coating layer wherein the polymer coating layer comprises a crystallisable polymer selected from at least one member of the group consisting of polyesters, polyolefins, and polyamides; (b) embossing the polymer coating layer to obtain a surface texture for light scattering, wherein the thermal embossing is applied at an embossing temperature of between 120-200° C.; (c) providing an adhesion layer on the embossed polymer coating layer and/or optionally pretreating the polymer coating layer to improve the adhesion; (d) providing a solar cell back electrode following the shape of the embossed polymer coating layer or the adhesion layer, and having a light reflection coefficient sufficiently high for reflecting most of incoming light wherein the solar cell back electrode is a metal layer having a thickness of between 0.1 and 0.6 μm; (e) providing one or more photovoltaic active layers capable to effectively transform light into electricity, wherein the photovoltaic active layer(s) comprise(s) thin film of photovoltaic active silicon, or thin film based on photovoltaic active organic molecules, or polymer or hybrid based active donor-acceptor layers system combined with hole conducting and exciton blocking layers; and (f) providing a transparent top electrode, wherein