Process for obtaining an organic polycrystalline material, notably with electro-optical properties.

摘要

Process for obtaining a polycrystalline organic material having, in particular, electro-optical properties, material obtained and electro- optical modulator comprising this material. …The process for obtaining it comprises a stage of preparation (1) of a powder, which has a particle size of 500 to 800 nm, of an organic compound which has a delocalised pi electron system and exhibits a noncentrosymmetric crystalline structure and intermolecular charge transfer groups, a stage of drying the powder under vacuum (2), a stage of prepressing (3) the powder under vacuum and a stage of uniaxial compression (5) of the dried powder, with heating and under vacuum. …This process makes it possible to obtain polycrystalline materials comprising elongate monocrystalline particles oriented in the same direction. ……