Patent ID: 7456045

Claim:
A process for preparing a laminated melt-processed organic-inorganic hybrid material, comprising: applying onto a substrate an organic-inorganic hybrid material; wherein said organic-inorganic hybrid material comprises an organic-inorganic hybrid perovskite and has a melting point below the melting point or decomposition temperature of the substrate; heating the substrate prior to applying the organic-inorganic hybrid material onto the substrate to a temperature above the melting point of the organic-inorganic hybrid material; maintaining the substrate and/or the organic-inorganic hybrid material at a temperature above the melting point of the organic-inorganic hybrid material but below the decomposition temperature of the organic-inorganic hybrid material and the substrate for a period of time sufficient to form a uniform melt; laminating a protective layer of a material on the uniform melt to produce a composite structure; wherein the laminated protective layer and the substrate are fabricated from the same material;and cooling the composite structure to an ambient temperature under conditions sufficient to produce the laminated melt-processed organic-inorganic hybrid material; wherein the cooling to an ambient temperature is carried out by exposing the uniform melt to a temperature gradient for controlling the grain size of the laminated melt-processed organic-inorganic hybrid material.