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. …<IMAGE>… |