Using different-solution-concentration precursors with citric acid as chelating agent and polyvinyl alcohol as dispersing media, Dy3＋ activated LaVO4 films were deposited on indium tin oxide （ITO） substrates. The s...Using different-solution-concentration precursors with citric acid as chelating agent and polyvinyl alcohol as dispersing media, Dy3＋ activated LaVO4 films were deposited on indium tin oxide （ITO） substrates. The scanning electronic microscope （SEM） showed that the compact and crack-free LaVO4：Dy3＋ film could be obtained at a suitable solution concentration. The deposited films could absorb the ultraviolet light below 400 nm and were transparent in the visible and infrared region as evidenced by the transmission spectra, and the photolumines- cence spectra exhibited the characteristic emissions of Dy3＋ peaking at 484 （blue） and 576 （yellow） nm due to the transitions of 4F9/2→6Hls/2 and 4F9/2→6H13/2, respectively. The potential application of LaVOa：Dy3＋ film in the dye-sensitized solar cell （DSSC） was also discussed.展开更多
We report that the composites of ZnO/porous Si （PS） can exhibit intensively white photoluminescence （PL） under proper excitation wavelength. The PS sample is formed by electrochemical anodization of n-type （111）...We report that the composites of ZnO/porous Si （PS） can exhibit intensively white photoluminescence （PL） under proper excitation wavelength. The PS sample is formed by electrochemical anodization of n-type （111） silicon. ZnO films are then deposited on the PS surface by pulsed laser deposition （PLD）. ZnO is transparent in the visible region, so the red PL from PS can be transmitted through the ZnO films. White PL from the ZnO layer on PS can be obtained, which consists of blue-green emission from ZnO and red emission from PS. The x-ray diffraction （XRD） pattern shows that the ZnO films deposited on PS surface are non-crystalline. Due to the roughness of the PS surface, some cracks appear in the ZnO films, which could be seen from the scanning electron microscopy （SEM） images.展开更多
The transparent luminescent thin films of doped terbium complex were obtained by sol gel method. The result indicates that rare earth carboxylates with poor solubility can be homogeneously doped into sol matrix in si...The transparent luminescent thin films of doped terbium complex were obtained by sol gel method. The result indicates that rare earth carboxylates with poor solubility can be homogeneously doped into sol matrix in situ. The fluorescence spectra show that the thin film material emits the characteristic narrow band emission of Tb 3+ under the UV excitation.展开更多
基金Project supported by the Higher Educational Natural Science Foundation of Anhui Province (KJ2010A012)National Natural Science Foundation of China (50901074)supported by the "211 Pro-ject" of Anhui University and Anhui University Young Scientific Research Fund (2009QN006A)
文摘Using different-solution-concentration precursors with citric acid as chelating agent and polyvinyl alcohol as dispersing media, Dy3＋ activated LaVO4 films were deposited on indium tin oxide （ITO） substrates. The scanning electronic microscope （SEM） showed that the compact and crack-free LaVO4：Dy3＋ film could be obtained at a suitable solution concentration. The deposited films could absorb the ultraviolet light below 400 nm and were transparent in the visible and infrared region as evidenced by the transmission spectra, and the photolumines- cence spectra exhibited the characteristic emissions of Dy3＋ peaking at 484 （blue） and 576 （yellow） nm due to the transitions of 4F9/2→6Hls/2 and 4F9/2→6H13/2, respectively. The potential application of LaVOa：Dy3＋ film in the dye-sensitized solar cell （DSSC） was also discussed.
基金Supported by the Natural Science Foundation of Shandong Province under Grant No Y2002A09.
文摘We report that the composites of ZnO/porous Si （PS） can exhibit intensively white photoluminescence （PL） under proper excitation wavelength. The PS sample is formed by electrochemical anodization of n-type （111） silicon. ZnO films are then deposited on the PS surface by pulsed laser deposition （PLD）. ZnO is transparent in the visible region, so the red PL from PS can be transmitted through the ZnO films. White PL from the ZnO layer on PS can be obtained, which consists of blue-green emission from ZnO and red emission from PS. The x-ray diffraction （XRD） pattern shows that the ZnO films deposited on PS surface are non-crystalline. Due to the roughness of the PS surface, some cracks appear in the ZnO films, which could be seen from the scanning electron microscopy （SEM） images.
文摘The transparent luminescent thin films of doped terbium complex were obtained by sol gel method. The result indicates that rare earth carboxylates with poor solubility can be homogeneously doped into sol matrix in situ. The fluorescence spectra show that the thin film material emits the characteristic narrow band emission of Tb 3+ under the UV excitation.
