Multilayer photovoltaic device and preparation and application thereof

Abstract

A multilayer photovoltaic compound to be applied to outer surfaces of any movable and / or stationary support for absorption and conversion of light radiation into electrical energy comprising, in the following order, at least one first layer (1 ) designed to adhere to the surface (S) of the support (T), at least one second layer (2) of an electrically conductive material which defines an electrode,at least one third optoelectronically active layer (3) designed to absorb photons and convert them into electrical energy, at least one fourth layer (4) of an electrically conductive material which defines a counter-electrode. The first layer (1 ) is formed of a substantially homogeneous and continuous base material, which is chemically and mechanically inert to the other layers (2, 3, 4) to define a universal anchoring base adaptable to surfaces of any shape and size. A fifth layer (5) of an optically transparent and electronically inert material may be possibly deposited on the underlying layers (1, 2, 3, 4) to protect and encapsulate them, thereby forming a single hermetically sealed unit.

Description

technical field [0001] The invention is applicable to the field of photovoltaic devices utilizing light energy. [0002] The invention relates more particularly to multilayer photovoltaic composites suitable for application to any surface and capable of absorbing photons of solar radiation or anyway impinging thereon, and converting them into electrical energy at predetermined spatial locations. [0003] The invention further relates to a method for preparing said multilayer composite and for applying it to surfaces and walls of any type and nature. Background technique [0004] It is known that light energy, especially solar energy, is one of the cleanest and most promising renewable energy sources. The current worldwide energy demand is mainly dependent on fossil fuels, especially oil and coal, to a lesser extent on nuclear energy, and only minimally on other renewable energy sources such as wind and solar energy, hydropower, biofuels and biomass. [0005] Although, rec...

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Problems solved by technology

[0011] A drawback of these prior art devices is that the substrate limits the application flexibility and adaptability to the carrier and requires a geometry determined by the shape of the carrier, whereby the device cannot be applied to walls or surfaces of complex shape

[0012] In principle, in the case of walls of complex shape, the corresponding geometry of the substrate could be pre-formed, but this would add considerable technical complexity and cost and hinder the use of photovoltaic devices in various application conditions

[0013] Furthermore, the available surface of the photovoltaic device is always limited to the available surface of the substrate, which must be of relatively small size, whereby the performance and efficiency of the device are consequently reduced

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