LIU SHI-QUAN, WANG LI-MIN, LIU FU-TIAN, et al.Preparation and application of silica microsphere.Journal of Functional Materials, 2004, 35(1): 11-13. PALILLA F C, LEVINE A K, Rinkevics M.Rare earth activated phosphors based on yttrium orthovanadate and related compounds.J. RIWOTZKI K, HAASE M.Wet-chemical synthesis of doped colloidal nanoparticles: YVO4: Ln (Ln= Eu, Sm, Dy).J. Modifying the solar spectrum to enhance silicon solar cell efficiency-an overview of available materials.Sol. STRÜMPEL C, MCCANN M, BEAUCARNE G, et al. Status Solidi (c), 2006, 3(3): 373-379.ĬONIBEER G.Third-generation photovoltaics.Mater. Phys., 2002, 92(3): 1668-1674.ĭIMROTH F.High-efficiency solar cells from III-V compound semiconductors. TRUPKE T, GREEN M A, WURFEL P.Improving solar sell efficiencies by down-conversion of high-energy photons.J. TRUPKE T, GREEN M A, WURFEL P.Improving solar cell efficiencies by up-conversion of sub-band-gap light.J. LE DONNE A, DILDA M, CRIPPA M, et al.Rare earth organic complexes as down-shifters to improve Si-based solar cell efficiency.Opt. RICHARDS B S.Enhancing the performance of silicon solar cells via the application of passive luminescence conversion layers.Sol. RICHARDS B S.Luminescent layers for enhanced silicon solar cell performance: down-conversion.Sol. The prepared YVO 4: Eu 2 core-shell structures have regular morphology and uniform particle sizes, which are suitable to be used as down-conversion light emitting layer in amorphous silicon solar cells.ĭEXTER D L.Possibility of luminescent quantum yields greater than unity.Phys. Thus YVO 4: Eu 2 core-shell configuration can be fabricated from YVO 4: Eu 3+ and SiO 2 microsphere to avoid agglomeration. The cell parameters such as short current density and photoelectric conversion efficiency increased from original 6.694 mA/cm 2 and 9.40% to 8.417 mA/cm 2 and 10.15%, respectively. Furthermore, the prepared YVO 4: Eu 2 core-shell structure films were used as down-conversion materials for amorphous silicon thin film solar cells. With the shell-core ratio setting as 0.6, the luminescence intensity of YVO 4: Eu 2 core-shell structure composite could reach up to more than 90% of pure YVO 4: Eu 3+ nano-powder. In order to improve the particle size distribution and morphology of YVO 4: Eu 3+ nano-powders, mono-dispersed spherical YVO 4: Eu 2 core-shell structure materials were prepared by coating a layer of YVO 4: Eu 3+ onto the surface of SiO 2 microspheres. However, the serious surface defects of YVO 4: Eu 3+ hinder the improvement of luminescent efficiency. Europium ions doped yttrium vanadate (YVO 4: Eu 3+) has excellent emission properties for down-conversion applications.
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