TECHNOLOGY FOCUS - POLYMERS - Preferred Layer: In the sealing layer, the diffusion barrier layer comprises a molecular graphene layer, where the diffusion barrier layer comprises a molecular boron nitride layer. The graphene or boron nitride layer comprises one to ten monolayers, preferably one to six monolayers, more preferably one to four monolayers. The graphene layer has a transparency of 75% or more in the range from about 350 nm to about 1400 nm of the electromagnetic spectrum. At least one of the base polymer layer and the top polymer layer consists of transparent polymer material or an opaque polymer material. The sealing layer comprises at least one additional layer selected from a group comprising an adhesion layer, a light management layer for enhancing either absorption or reflection, or a layer to incorporate either a moisture sensor or a moisture indicator. The base layer is a deposited layer, obtained by chemical vapor deposition and/or by lamination. Preferred Method: Manufacturing the sealing layer comprises a lamination process of the base layer after the deposition of the base layer by chemical vapor deposition; and a removal of the diffusion barrier layer from the precursor surface by either etching away the precursor substrate or by a lift off process that separates the diffusion barrier layer from the precursor surface. The diffusion barrier layer is one selected from a molecular graphene layer and a molecular boron nitride layer. Preferred Device: The electronic or photovoltaic device comprises a display structure of organic light emitting diode (OLED) type or liquid crystal display (LCD) type, where the sealing layer is arranged on a surface of the display structure that is to be sealed off. The device comprises a memory structure, where the sealing layer is arranged on a surface of the memory structure that is to be sealed off. The device is a solar panel comprising one or more solar cells each having its respective photoactive surface facing towards a light collecting side, where the sealing layer is arranged on a surface of the solar panel that is to be sealed off. The device is a solar panel comprising one or more solar cells each having its respective photoactive surface facing towards a light collecting side, the solar cells being encapsulated in an ethyl vinyl acetate layer, a glass plate being arranged on top of the ethyl vinyl acetate layer, where the sealing layer is arranged between the ethyl vinyl acetate layer and the glass plate. The base polymer layer and the top polymer layer consist of ethyl vinyl acetate polymer. The device is a solar cell having a photoactive surface facing towards a light collecting side, where the sealing layer is arranged on a surface of the solar cell on at least the light collecting side. The device is embodied as planar structure and the sealing layer wraps around an edge of the planar structure. EXAMPLE - No suitable example given.