Patent ID: 8846942

Claim:
A luminescent solar concentrator comprising at least one disubstituted benzothiadiazole compound having general formula (I): wherein: R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 , equal to or different from each other, represent a hydrogen atom; or they are selected from linear or branched C 1 -C 20 alkyl groups, cycloalkyl groups optionally substituted, aryl groups optionally substituted, linear or branched C 1 -C 20 alkoxyl groups, optionally substituted; or R 1 and R 2 , can be optionally bound to each other so as to form, together with the carbon atoms to which they are bound, a cyclic or a polycyclic system containing from 3 to 14 carbon atoms, saturated, unsaturated, or aromatic, optionally containing one or more heteroatoms selected from the group consisting of oxygen, sulfur, nitrogen, silicon, phosphorous, and selenium; or R 3 and R 4 , can be optionally bound to each other so as to form, together with the carbon atoms to which they are bound, a cyclic or a polycyclic system containing from 3 to 14 carbon atoms, saturated, unsaturated, or aromatic, optionally containing one or more heteroatoms selected from the group consisting of oxygen, sulfur, nitrogen, silicon, phosphorous, and selenium; or R 5 and R 6 , can be optionally bound to each other so as to form, together with the carbon atoms to which they are bound, a cyclic or a polycyclic system containing from 3 to 14 carbon atoms, saturated, unsaturated, or aromatic, optionally containing one or more heteroatoms selected from the group consisting of oxygen, sulfur, nitrogen, silicon, phosphorous, and selenium; or R 6 and R 7 , can be optionally bound to each other so as to form, together with the carbon atoms to which they are bound, a cyclic or a polycyclic system containing from 3 to 14 carbon atoms, saturated, unsaturated, or aromatic, optionally containing one or more heteroatoms selected from the group consisting of oxygen, sulfur, nitrogen, silicon, phosphorous, and selenium.