Luminescent solar concentrator comprising at least one disubstituted benzoheterodiazole compound of general formula: in which: - Z represents a sulfur atom, an oxygen atom; or an NR 6 group in which R 6 is selected from linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, or from optionally substituted aryl groups; - R 1, R 2 and R 3, which are the same or different, represent a hydrogen atom; or are selected from linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, optionally containing heteroatoms, optionally substituted cycloalkyl groups, optionally substituted aryl groups, optionally substituted linear or branched C 1 -C 20, preferably C 1 -C 8, alkoxyl groups, optionally substituted phenoxyl groups, or - COOR 7 groups or -OCOR 7 groups in which R 7 is selected from linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, or is a cyano group, provided that when the substituents R 1 represents a hydrogen atom, at least one of the substituents R 2 and R 3 represents an optionally substituted aryl group or an optionally substituted phenoxyl group; - or R 1 and R 2, can optionally be linked together so as to form, together with the carbon atoms to which they are linked, a saturated, unsaturated or aromatic cyclic ring or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, optionally containing one or more heteroatoms such as oxygen, sulfur, nitrogen, silicon, phosphorus, selenium; - or R 2 and R 3 can optionally be linked together so as to form, together with the carbon atoms to which they are linked, a saturated, unsaturated or aromatic cyclic ring or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, optionally containing one or more heteroatoms such as oxygen, sulfur, nitrogen, silicon, phosphorus, selenium; - R 4 and R 5, which are the same or different, represent a hydrogen atom; or are selected from linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, optionally containing heteroatoms, optionally substituted cycloalkyl groups, optionally substituted aryl groups, optionally substituted linear or branched C 1 -C 20, preferably C 1 -C 8, alkoxyl groups, -COOR 7 groups or -OCOR7 groups in which R 7 is selected linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, or is a cyano group; - or R 4 and R 5, can optionally be linked together so as to form, together with the carbon atoms to which they are linked, a saturated, unsaturated, or aromatic cyclic ring or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, optionally containing one or more heteroatoms such as sulfur, nitrogen, silicon, phosphorus, selenium. - Z represents a sulfur atom, an oxygen atom; or an NR 6 group in which R 6 is selected from linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, or from optionally substituted aryl groups; - R 1, R 2 and R 3, which are the same or different, represent a hydrogen atom; or are selected from linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, optionally containing heteroatoms, optionally substituted cycloalkyl groups, optionally substituted aryl groups, optionally substituted linear or branched C 1 -C 20, preferably C 1 -C 8, alkoxyl groups, optionally substituted phenoxyl groups, or - COOR 7 groups or -OCOR 7 groups in which R 7 is selected from linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, or is a cyano group, provided that when the substituents R 1 represents a hydrogen atom, at least one of the substituents R 2 and R 3 represents an optionally substituted aryl group or an optionally substituted phenoxyl group; - or R 1 and R 2, can optionally be linked together so as to form, together with the carbon atoms to which they are linked, a saturated, unsaturated or aromatic cyclic ring or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, optionally containing one or more heteroatoms such as oxygen, sulfur, nitrogen, silicon, phosphorus, selenium; - or R 2 and R 3 can optionally be linked together so as to form, together with the carbon atoms to which they are linked, a saturated, unsaturated or aromatic cyclic ring or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, optionally containing one or more heteroatoms such as oxygen, sulfur, nitrogen, silicon, phosphorus, selenium; - R 4 and R 5, which are the same or different, represent a hydrogen atom; or are selected from linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, optionally containing heteroatoms, optionally substituted cycloalkyl groups, optionally substituted aryl groups, optionally substituted linear or branched C 1 -C 20, preferably C 1 -C 8, alkoxyl groups, -COOR 7 groups or -OCOR7 groups in which R 7 is selected linear or branched C 1 -C 20, preferably C 1 -C 8, alkyl groups, or is a cyano group; - or R 4 and R 5, can optionally be linked together so as to form, together with the carbon atoms to which they are linked, a saturated, unsaturated, or aromatic cyclic ring or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, optionally containing one or more heteroatoms such as sulfur, nitrogen, silicon, phosphorus, selenium.