Abstract: The present invention concerns a crucible for solidifying a silicon ingot from molten silicon, characterized in that it is coated at least partially on the inner surface thereof with an outer layer provided in the form of a stack of laminations, each lamination having a thickness varying from 5 to 150 ?m, and being formed from a material obtained by thermal decomposition of polysilazane(s) and/or polysiloxane(s) and wherein inorganic particles are embedded having a size varying from 50 ?m to 200 ?m. The present invention further concerns a method for preparing such crucibles.

Abstract: The present invention concerns a crucible for solidifying a silicon ingot from molten silicon, characterised in that it is coated at least partially on the inner surface thereof with an outer layer provided in the form of a stack of laminations, each lamination having a thickness varying from 5 to 150 ?m, and being formed from a material obtained by thermal decomposition of polysilazane(s) and/or polysiloxane(s) and wherein inorganic particles are embedded having a size varying from 50 ?m to 200 ?m. The present invention further concerns a method for preparing such crucibles.

Abstract: The electrically active layer of an organic heterojunction solar cell is associated with an additional layer, so as to promote the vertical segregation between the p-type organic semiconductor material and the n-type carbonaceous semiconductor material that are present in the electrically active layer. The additional layer is in direct contact with the electrically active layer. Said additional layer comprises a compound forming noncovalent interactions with the n-type semiconductor carbonaceous material. In particular, said compound can be P4VP when the electrically active layer is formed of a mixture of P3HT:PCBM. Moreover, said additional layer comprises a n-type semiconductor material.