Light energy storage and use

A light energy storage device comprising an organic photovoltaic (OPV) module and a thin film supercapacitor (SC) for the storage of an electric energy generated by the OPV module, said device comprising:

• a) at least a first and a second substrates (S1, S2) and optionally an intermediate substrate (IS), made of glass or a polymer material,
• b) one OPV module comprising, on a surface (su1) of the first substrate S1, one OPV cell, said OPV cell comprising:
• i) a transparent conductive cathode layer (CL) covering said surface (su1) of the first substrate (S1),
• ii) a first interfacial metallic oxide-based nanoparticle or organic layer covering said cathode,
• iii) a photovoltaic active layer covering said first interfacial layer, and
• iv) a second interfacial layer (SIL) comprising a polymer blend of poly(3,4-ethylenedioxythiophene) and sodium poly(styrene sulfonate), said second interfacial layer constituting the anode and covering said photovoltaic active layer, said second interfacial layer being continuous, having an organic fibrous structure and an average thickness of between 100 nm and 400 nm;
• wherein each layer i) to iv) being printed by inkjet printing;
• c) a thin film SC printed on the said surface (su1) of said first substrate (S1) or on a surface (su IS) of the intermediate substrate (IS), by digital inkjet printing;
• d) a control means (CM), said control means being fixed on the same surface (su1 or su IS) and substrate (S1 or IS) as the thin film SC with a conductive glue;
• and
• e) one conductive printed by inkjet printing and linking the OPV module, the thin film SC and the control means, and allowing the transfer of the electric energy generated by the OPV module to the thin film SC;
• wherein the second substrate (S2) covers the thin film SC and the control means.