TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Chromophore: Alternatively, the chromophore is represented by Formula (IIa) and Formula (IIb).Het2=Formulas (26-35);Rd and Re=hydrogen, optionally substituted alkyl, optionally substituted alkoxyalkyl, optionally substituted alkenyl, optionally substituted heteroalkyl, optionally substituted heteroalkenyl, optionally substituted aryl, optionally substituted arylalkyl, optionally substituted heteroaryl, optionally substituted cylcoalkyl, optionally substituted cycloalkenyl, optionally substituted cycloheteroalkyl, optionally substituted cycloheteroalkenyl, optionally substituted amino, optionally substituted amido, optionally substituted cyclic amido, optionally substituted cyclic imido, optionally substituted alkoxy, optionally substituted carboxy, and optionally substituted carbonyl; or Rd and Re together form an optionally substituted ring or an optionally substituted polycyclic ring system, where each ring is independently cycloalkyl, aryl, heterocyclyl, or heteroaryl; andD1, D2, D3, and D4=hydrogen, optionally substituted alkoxy, optionally substituted aryloxy, optionally substituted acyloxy, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted amino, optionally substituted amido, optionally substituted cyclic amido, and optionally substituted cyclic imido, -aryl-NR'R'', -aryl-aryl-NR'R'', and -heteroaryl-heteroaryl-R'; andR' and R''=optionally substituted alkyl, optionally substituted alkenyl, optionally substituted aryl; provided that D1 and D2 are not both hydrogen, and D1 and D2 are not optionally substituted thiophene or optionally substituted furan.In a second alternative case, the chromophore is represented by Formula (IIIa) and Formula (IIIb).Het3=selected from Formulas (37-50).Preferred Module: In the photovoltaic module, the wavelength conversion luminescent medium is a film w a thickness in the range of 0.1 mu m to about 1 mm.The photovoltaic device or solar cell comprises at least one device selected from a Cadmium Sulfide/Cadmium Telluride solar cell, a 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 a refractive index matching liquid or optical adhesive that is used to attach the wavelength conversion luminescent medium to a light incident surface of the photovoltaic device or solar cell.    TECHNOLOGY FOCUS - POLYMERS - Preferred Medium: In the wavelength conversion luminescent medium, the polymer matrix comprises a substance selected from polyethylene terephthalate, polymethyl methacrylate, polyvinyl butyral, ethylene vinyl acetate, ethylene tetrafluoroethylene, polyimide, amorphous polycarbonate, polystyrene, siloxane sol-gel, polyurethane, polyacrylate, and combinations. The refractive index of the polymer matrix material is in the range of 1.4-1.7. The luminescent dye is present in the polymer matrix in an amount in the range of 0.01-3 wt.%. Preferred Definitions:    D1 and D2=alkoxyaryl, -aryl-NR'R'', and -aryl-aryl-NR'R''; and/or Formulas (11-25) and Formula (36);    R' and R''=alkyl and aryl optionally substituted by alkyl, alkoxy, or -C(=O)R;    R=optionally substituted aryl or optionally substituted alkyl; or one or both of R' and R'' forms a fused heterocyclic ring with aryl to which the N is attached to;    L=haloalkyl, alkylaryl, alkyl substituted heteroaryl, arylalkyl, heteroamino, heterocyclic amino, cycloamido, cycloimido, aryloxy, acyloxy, alkylacyl, arylacyl, alkylcarboxy, arylcarboxy, optionally substituted phenyl, and optionally substituted naphthyl;    Het is Formula (1), provided that Ra and Rb are not both hydrogen, and D1 and D2 are selected from Formulas (11-25); and/or Formula (2), provided that Ra and Rb are not both hydrogen; and/or Formula (3), provided that X is selected from -N(A0)- and -Se-; Z is selected from -N(Ra)- and -S-; and D1 and D2 are independently selected from Formulas (11-25); and/or Formula (6), provided that D1 and D2 are not hydroxyl or C-C(=O)-O-N(H)-, and D1 and D2 do not comprise bromine;    Het2=Formula (26), provided that Ra and Rb are not both hydrogen, and D1 and D2 are selected from Formulas (11-25); and/or Formula (27), provided that Ra and Rb are not both hydrogen; and/or Formula (28), provided that D1 and D2 are selected from Formulas (11-25) and Formula (36); and/or Formula (31), provided that D1 and D2 are not hydroxyl or C-C(=O)-O-N(H)-, and D1 and D2 do not comprise bromine;    Het3=Formula (37), provided that D1 and D2 are selected from Formulas (11-25) and Formula (36); and/or Formula (39), provided that D1 and D2 are selected from Formulas (11-25) and Formula (36); and/or Formula (44), provided that D1 and D2 are not hydroxyl or C-C(=O)-O-N(H)-, and D1 and D2 do not comprise bromine;    X=-N(A0)-, -S-, and -Se-;    Z=-N(Ra)-, -S-, and -Se-;    A0=hydrogen, optionally substituted 1-10C alkyl, optionally substituted aryl, optionally substituted heteroaryl, and optionally substituted alkoxyalkyl; and/or selected from hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert.-butyl, pentyl, hexyl, Formulas (i-iv); and    Ra, Rb, and Rc=hydrogen, optionally substituted 1-10C alkyl, optionally substituted aryl, optionally substituted heteroaryl, and optionally substituted alkoxyalkyl; or Ra and Rb, or Rb and Rc, or Ra and Rc, together form an optionally substituted polycyclic ring system; and/or Ra, Rb, and Rc are independently selected from: hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, hexyl, Formulas (v-xxix), and/or together form a ring structure selected from: Formulas (xxx-xli).    EXAMPLE - No suitable example given.