TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The neutral luminescent solar concentrator device further comprises a photoelectric device in communication with the edge surface, the photoelectric device configured to receive converted photons and absorbed photons via the edge surface and to convert them into electrical energy, a first plate on the top of the wavelength conversion layer and a second plate below the bottom of the wavelength conversion layer, where the plates are configured to internally reflect and refract the a second portion of absorbed and the first portion of converted photons towards the edge surface, and the second plate is configured to allow a third portion of absorbed photons and the second portion of converted photons to exit the neutral luminescent solar concentrator device, and the plates comprise a material selected from glass and polymer. The photovoltaic device or solar cell comprises a cadmium sulfide/cadmium telluride solar cell, copper indium gallium diselenide solar cell, an amorphous silicon solar cell, a microcrystalline silicon solar cell, or a crystalline silicon solar cell. The photovoltaic module further comprises refractive index matching liquid to attach the luminescent solar concentrator to the light incident surface of the photovoltaic device or solar cell.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The photostable chromophore is an organic compound, benzotriazole compound of formulae (I)-(IX), perylene compound of formula (X) and (XI), compound of formula (D1-Het-(L-Het)i-D2), compound of formula (Het2-A0-Het2), benzotriazole compound of formula (XII), compound of formula (Het3-Ra-Het3), benzotriazole compound of formula (XIII), perylene derivative dyes, benzotriazole derivative dyes, benzothiadiazole derivative dyes, benzo heterocyclic system derivative dyes ad/or diazaborinine derivative dyes. The wavelength conversion layer comprises one or more additional chromophores, and a polymer matrix. The one or more chromophore is a down-shifting chromophore. The neutral luminescent solar concentrator device further comprises sensitizers, plasticizers, UV stabilizer, antioxidant, or absorber.R1, R2, R4, R5, R6 = alkyl, alkenyl, cycloalkyl, heteroalkyl, aryl, heteroaryl, alkoxyalkyl, heteroalkenyl, arylalkyl, heteroaryl, heteroarylalkyl, cycloalkenyl, cycloheteroalkyl, cycloheteroalkenyl, amino, amido, cyclic amido, cyclic imido, alkoxy, carboxy, carbonyl, ether, ketone, sulfone or sulfonamide (all optionally substituted);R3 = alkyl, alkenyl, cycloalkyl, heteroalkyl, aryl, heteroaryl, alkoxyalkyl, heteroalkenyl, arylalkyl, heteroaryl, cycloalkenyl, cycloheteroalkyl, cycloheteroalkenyl, amino, amido, cyclic amido, cyclic imido, alkoxy, carboxy, carbonyl, ether, ketone, sulfone or sulfonamide (all optionally substituted) or R3 = polycyclic ring system (optionally substituted);R4+R5, R4+R6, R5+R6, R4+R5+R6 = ring or polycyclic ring system (both optionally substituted);L = alkyl, heteroalkyl, alkylene, heteroalkylene, alkynylene, arylene or heteroarylene (all optionally substituted);i = 0-100;A', A'' = alkyl, alkyenyl, heteroalkyl, aryl, heteroaryl, amino, amido, cyclo amido, cyclo imido, alkoxy, carboxy or carbonyl (all optionally substituted);A2 = alkylene, alkenylene, arylene, heteroarylene (all optionally substituted), ketone, ester or amine group of formula (a);Ar1 = aryl or heteroaryl (both optionally substituted);R7 = H, alkyl, alkenyl, aryl, heteroaryl, aralkyl or alkaryl;R8 = alkylene, alkenylene, arylene, heteroarylene (all optionally substituted), ketone or ester;R7+R8 = ring;L1 = alkylene, alkenylene, alkynylene, arylene or heteroarylene (all optionally substituted);R9 = alkyl, alkenyl, aryl or heteroaryl (all optionally substituted);R10= cyclic imido (optionally substituted) or amine group of formula (b);R11 = alkoxy, aryloxy, acyloxy (all optionally substituted) or amino;Z, Z1 = -O-, -S-, -Se-, -Te-, -NR12-, -CR12=CR12- OR -CR12=N-;R12 = 1-6C alkyl, 1-10C aryl (both optionally substituted) or H;j, k = 0, 1 or 2;Y1, Y2 = aryl, alkyl, cycloalkyl, alkoxy or amino (all optionally substituted);R13, R14 = H, 1-10C alkyl, 3-10C cycloalkyl, 1-10C alkoxy, 6-18C aryl or 6-20C aralkyl;m, n = 1-5;R15, R16 = 6-18C aryl or 6-20C aralkyl;Het = nitrogen-containing group of formulas (c), (d), (e), (f), (g), (h), (i) (j), (k), (l) or (m);X = -N(A3)-, -O-,-S-, -Se- or -Te-;Z = -N(Ra)-, -O-,-S-, -Se- or -Te-;A3 = alkyl, alkyenyl, heteroalkyl, aryl, heteroaryl, amino, amido, cyclic amido, cyclic imido, alkoxy, acyl, carboxy or carbonyl (all optionally substituted); or H;Ra, Rb, Rc, Rd, Re = alkyl, alkoxyalkyl, alkenyl, heteroalkyl, heteroalkenyl, aryl, arylalkyl, heteroaryl, cylcoalkyl, cycloalkenyl, cycloheteroalkyl, cycloheteroalkenyl, amino, amido, cyclic amido, cyclic imido, alkoxy, carboxy or carbonyl (all optionally substituted) or H;Ra+Rb, Rb+Rc, Ra+Rc = ring or polycyclic ring system (both optionally substituted), where each ring is independently cycloalkyl, aryl, heterocycloalkyl, or heteroaryl;L2 = alkyl, aryl, heteroaryl, alkoxy (all optionally substituted), amino, amido, imido, acyl or carboxy;D1,D2 D3, D4 = alkoxy, aryloxy, acyloxy, alkyl, aryl, heteroaryl, amino (all optionally substituted), amido, cyclic amido, cyclic imido, hydrogen, -aryl-NRxRy, -aryl-aryl-NRxRy or -heteroaryl-heteroaryl-Rx;Rx, Ry = alkyl, alkenyl or aryl (all optionally substituted);Het2 = group of formulae (a1), (a2), (a3), (a4), (a5), (a6), (a7), (a8), (a9), (a10) or (a11); andHet3 = nitrogen-containing group of formula (b1), (b2), (b3), (b4), (b5), (b6), (b7), (b8), (b9), (b10), (b11), (b12), (b13), (b14), (b15) or (b16).Provided than D1, D2, D3, D4 are not both hydrogen, and D3, D4, L2 are not optionally substituted thiophene or optionally substituted furan.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer matrix of the wavelength conversion layer comprises polymers selected from polyethylene terephthalate, polymethyl methacrylate, polyvinyl butyral, ethylene vinyl acetate, ethylene tetrafluoroethylene, polyimide, amorphous polycarbonate, polystyrene, siloxane sol-gel, polyurethane, and polyacrylate, and is made of host polymer and/or co-polymer.