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Abstract

A luminescent solar concentrator (LSC) comprising at least one tetra-substituted benzoheterodiazole compound having general formula (I): wherein: R₁ and R₂, equal to or different from each other, are selected from: C₆-C₄₀, preferably C₆-C₂₀ aryl groups, optionally substituted; C₄-C₄₀, preferably C₅-C₂₀, heteroaryl groups, optionally substituted; R₃ and R₄, equal to or different from each other, are selected from: halogen atoms such as, for example, fluorine, chlorine, bromine, iodine, preferably fluorine; linear or branched C1-C30, preferably C₁-C₂₀, trihalogenated alkyl groups; C₆-C₄₀, preferably C₆-C₂₀, aryloxyl groups optionally substituted; linear or branched C₁-C₃₀, preferably C₁-C₂₀, alkoxyl groups optionally substituted; C₄-C₄₀, preferably C₅-C₂₀, heteroaryloxyl groups optionally substituted; Z represents a sulfur atom, an oxygen atom or a selenium atom; a NR₅ group wherein R₅ represents a hydrogen atom, or it is selected from linear or branched C₁-C₂₄, preferably C₆-C₂₄, alkyl groups, optionally containing heteroatoms; a CR₆R₇ group wherein R₆ and R₇, equal to or different from each other, represent a hydrogen atom, or they are selected from linear or branched C₁-C₃₀, preferably C₆-C₂₄, alkyl groups, optionally containing heteroatoms, linear or branched C₁-C₃₀, preferably C₆-C₂₄, alkoxyl groups, optionally substituted, C₃-C₃₀, preferably C₄-C₂₄, cycloalkyl groups, optionally substituted, or, R₆ and R₇ can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C₁-C₃₀, preferably C₁-C₁₅, alkyl groups, said cycle optionally containing heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium.

First Claim