TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Device: The photovoltaic device comprises at least one device selected from a Silicon based device, a III-V or II- VI PN junction device, a Copper-Indium-Gallium-Selenium (CIGS) thin film device, an organic sensitizer device, an organic thin film device, or a Cadmium Sulfide/Cadmium Telluride (CdS/CdTe) thin film device. The photovoltaic module further comprises a refractive index matching adhesive for attaching the wavelength conversion film to the photovoltaic device. In the luminescent panel, the emission spectrum of the first organic photostable chromophore and the absorption spectrum of the second photostable chromophore have minimal overlap. The luminescent panel further comprises a transparent substrate layer, where the transparent substrate layer comprises glass or polymer. The luminescent panel further comprises a stabilizer, antioxidant, and/or UV absorber, disposed within the luminescent panel. The luminescent panel further comprises an additional layer where the additional layer further comprises a UV absorber, stabilizer, and/or an antioxidant. The solar energy conversion device is encapsulated within the luminescent panel. The solar energy conversion device comprises a Silicon based device, a III-V or II- VI PN junction device, a Copper-Indium-Gallium-Selenium (CIGS) thin film device, an organic sensitizer device, an organic thin film device, or a Cadmium Sulfide/Cadmium Telluride (CdS/CdTe) thin film device. The luminescent light and energy collection panel further comprises a refractive index matching substance configured to attach the luminescent solar concentrator to the light incident surface of the solar energy conversion device.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The absorption maximum of the first organic photostable chromophore is 300-400 nm and the emission maximum of the first organic chromophore is 400-520 nm. The absorption maximum of the second organic photostable chromophore is greater than 400 nm (preferably 480-620 nm) and the emission maximum of the second organic photostable chromophore is 550-800 nm. The first organic photostable chromophore and the second organic photostable chromophore are selected from a perylene derivative, a benzotriazole derivative, a benzothiadiazole derivative, or a benzo heterocyclic system derivative (preferably benzotriazole derivative). The first organic photostable chromophore is selected from 4 chromophore compounds as given in the specification e.g. 4,7-diphenyl-2H-benzo(d)(1,2,3)triazole derivative of formula (I), and 4,4'-(2-methyl-2H-benzo(d)(1,2,3)triazole-4,7-diyl)bis(N,N-diphenylaniline). The second organic photostable chromophore is selected from 14 chromophore compounds as given in the specification e.g. 2H-benzo(d)(1,2,3)triazole derivatives of formulae (IIa) and (IIb); and perylene derivatives of formulae (IIc) and (IId).R1-R3=alkyl (optionally substituted), or aryl;i=0-100;A1 and A2=alkyl, alkyenyl, heteroalkyl, aryl, heteroaryl, amino, amido, cyclo amido, cyclo imido, alkoxy, carboxy or carbonyl (all optionally substituted);A2=alkylene, alkenylene, arylene or heteroarylene (all optionally substituted), ketone, ester, or -Ar-N(R7)-C(O)-R8-C(O)-N(R7)-Ar-;Ar=optionally substituted (hetero)aryl;R7=H, alkyl, alkenyl, aryl, heteroaryl, aralkyl, or alkaryl;R8=alkylene, alkenylene, arylene, heteroarylene (all optionally substituted), ketone, or ester;orR7+R8=ring;D1 and D2=alkoxy, aryloxy, acyloxy, alkyl, aryl, heteroaryl or amino (all optionally substituted); amido, cyclic amido, cyclic imido, or H;L1=alkylene, alkenylene, alkynylene, arylene or heteroarylene (all optionally substituted);R13 and R14=H, 1-10C alkyl, 3-10C cycloalkyl, 1-10C alkoxy, 6-18C aryl, or 6-20C aralkyl;m and n=1-5;R15 and R16=6-18C aryl or 6-20C aralkyl.Provided that D1 and D2 are not both H.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The wavelength conversion film further comprises a second organic photostable chromophore. In the wavelength conversion film, the concentration of the first organic photostable chromophore and the concentration of the second organic photostable chromophore in the polymer matrix are selected to be in an amount 0.01-10 wt.% (preferably 0.1-1 wt.%). The thickness of wavelength conversion film is 0.1 mu m to 1 mm (preferably 0.5 mu m to 1 mm). Preferred Components: The polymer matrix is selected from a host polymer, a host polymer and a co-polymer, or multiple polymers. The polymer matrix is formed from a substance selected from polyethylene terephthalate, polymethyl methacrylate, polyvinyl butyral, ethylene vinyl acetate, ethylene tetrafluoroethylene, polyimide, amorphous polycarbonate, polystyrene, siloxane sol-gel, polyurethane, and/or polyacrylate. The refractive index of the polymer matrix material is 1.4-1.7. The polymer matrix further comprises at least one sensitizer; at least one plasticizer; and ultra-violet (UV) stabilizer, antioxidant, or absorber. EXAMPLE - No suitable example given.