TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Component: The transparent insulating layer is quartz glass, silicate glass, high-silicon-oxygen glass, sodium-calcium glass, polyvinyl chloride, polycarbonate or polyester.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The electron donor material is phthalocyanine, pentacene, porphyrin and cyanine. The electron receptor is perylene-3,4,9,10-tetracarboxylic acid dianhydride, fullerene C60, fullerene C70, perylene and its derivatives, inorganic nano materials, cadmium selenide, cadmium sulfide, cadmium telluride, titanium dioxide, zinc oxide, lead sulfide, tin oxide, carbon nanotube or graphene. The lower conversion layer is halides single-doped and/or double-doped with rare earth ions, oxide, borate, silicate, phosphate and vanadate. The halide is chloride, of yttrium fluoride, lithium gadolinium tetrafluoride, potassium yttrium fluoride, lithium yttrium fluoride, and/or barium fluoride. The oxide is rare earth oxide, zinc oxide, zirconium oxide and/or composite oxide; borate is gadolinium borate or gadolinium trialuminum borate; vanadate is lanthanum orthovanadate; and single-doped or double-doped rare earth ions is erbium (Er3+), terbium (Tb3+), europium (Eu3+), praseodymium (Pr3+), thulium (Tm3+), gadolinium (Gd3+), neodymium (Nd3+), Tb3+/ytterbium (Yb3+), Pr3+/Yb3+, Gd3+/Eu3+ or Tm3+/Yb3+. The transparent electrode layer is indium-tin oxide transparent electrode, zinc-aluminum oxide transparent electrode, zinc-gallium oxide transparent electrode, indium-zinc oxide transparent electrode, metal film, aluminum film, silver film or carbon nanotube conducting film. The volume ratio of photoresist and photoresist thinner is 1:1. The first and third photosensitive layers comprise electron donor material and other one is made from electron receptor material. The second photosensitive layer is heterojunction formed by mixing electron donor material with electron receptor material.    TECHNOLOGY FOCUS - METALLURGY - Preferred Components: The high-reflectivity electrode layer is metal film electrode or metal oxide high-reflectivity electrode. The metal film is gold, silver, aluminum, calcium-aluminum or magnesium-silver; and metal oxide is indium tin oxide or zinc oxide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The first buffering layer and second buffering layer comprise poly(3,4-ethylidenedioxythiophene)-poly(styrene sulfonic acid) polymer conducting film or 2,9-dimentyl-4,7-diphenyl-1, 10-phenanthroline, tris(8-hydroxyquinolinato)aluminum, copper phthalocyanine and lithium fluoride micromolecular material.