Pt/Y2O3:Eu3+ composite nanotubes: Enhanced photoluminescence and application in dye-sensitized solar cells

Abstract

Y(OH) 3 :Eu 3+ nanotubes were synthesized using a facile hydrothermal method, and then, Pt particles were grown on the surface of the nanotubes using a combination of vacuum extraction and annealing. The resulting Pt/Y 2 O 3 :Eu 3+ composite nanotubes not only exhibited enhanced red luminescence under 255-or 468-nm excitation but could also be used to improve the efficiency of dyesensitized solar cells, resulting in an efficiency of 8.33%, which represents a significant enhancement of 11.96% compared with a solar cell without the composite nanotubes. Electrochemical impedance spectroscopy results indicated that the interfacial resistance of the TiO 2 -dye|I 3 -/I -electrolyte interface of the TiO 2 -Pt/Y 2 O 3 :Eu 3+ composite cell was much smaller than that of a pure TiO2 cell. In addition, the TiO 2 -Pt/Y 2 O 3 :Eu 3+ composite cell exhibited a shorter electron transport time and longer electron recombination time than the pure TiO 2 cell.

Silver nanoparticles embedded hybrid organometallic complexes: Structural interactions, photo-induced energy transfer, plasmonic effect and optical thermometry

“…6,28 The PL spectrum of ETP (shown in Fig. 6(c) [43][44][45] The hypersensitive transition at 611 nm possesses the highest intensity and the intensity of rest of emission bands is relatively very low. This is due to the asymmetry created by organic ligands (TTA and Phen) around the Eu 3+ ion.…”

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“…The unique luminescent properties render Ln 3+ -doped nanocrystals particularly useful in the fields of optical devices and biomedicine, such as displays, immunoassays, and ant counterfeiting. Here, the application of typical Ln 3+ -doped nanocrystals has been summarized in Table 1 [2,8,[12][13][14][15][16][17][18][19][20][21]. Optical and magnetic materials have attracted much attention due to their importance in the fields of chemistry, biology, medical sciences, and biotechnology.…”

Topological Luminophor Y2O3:Eu3++Ag with High Electroluminescence Performance

“…The quenching efficiency of Au or Ag within the samples is decided by energy transfer efficiency that depends largely on the extent of the spectral overlap with the luminescence resonance energy transfer (LRET) system. Yu et al [19] synthesized Y2O3:Eu 3+ nanotubes by hydrothermal method, with Pt nanoparticles onto the surface via vacuum evaporation, and the effciency of solar cells improved by approximately 11.96% with the increased luminescence intensity [20][21][22][23] . Precious metals are usually used as a core or shell to form core-shell structure which is usually applied to enhance the photoluminescence of RE luminescent materials.…”