Red Emission Through Radiative Energy Transfer from Wavelength-Tunable Zn[sub 1−x]Cd[sub x]O Layers to Y[sub 2]O[sub 3]:Eu[sup 3+] Phosphor Films

Annealing temperature and environment effects on ZnO nanocrystals embedded in SiO2: a photoluminescence and TEM study

“…The near-UV emission of ZnO-NC can also be utilized for efficient energy transfer to rare earth ions (e.g., Eu 3+ and Er 3+ ions) to obtain emission in the visible (for lighting) or in the near-infrared (for telecommunications) regions [3,4]. In order to facilitate the energy transfer, the emission band from the excited ZnO must overlap with the absorption band of the rare earth ions.…”

“…In order to facilitate the energy transfer, the emission band from the excited ZnO must overlap with the absorption band of the rare earth ions. In our earlier work [3], for example, the ZnO films were doped with Cd ions to maximize the overlap between the emission of Cd-doped ZnO and the absorption of Eu 3+ ions. We propose here the development and study of ZnO-NC embedded in a SiO 2 matrix to have a broadband near-UV emission from ZnO to facilitate and optimize the energy transfer to rare earth ions without introducing doping ions such as Cd ions [3].…”

“…In our earlier work [3], for example, the ZnO films were doped with Cd ions to maximize the overlap between the emission of Cd-doped ZnO and the absorption of Eu 3+ ions. We propose here the development and study of ZnO-NC embedded in a SiO 2 matrix to have a broadband near-UV emission from ZnO to facilitate and optimize the energy transfer to rare earth ions without introducing doping ions such as Cd ions [3]. It is desirable to embed ZnO-NCs in a dielectric matrix, such as SiO 2 , to provide both chemical and physical protection for the ZnO-NCs [5] and also to incorporate rare earth ions.…”

Development of luminescent europium-based phosphor films

“…However, the emission efficiency of Y 2 O 3 :Eu 3+ phosphor films is still low. In general, the low efficiency of phosphor films is associated with the process conditions, the composition of materials, and the morphology of films [1][2][3][4][5][6], [1][2][3][4][5][6][7]. Hence, considerable efforts have been devoted to increase the efficiency of Y 2 O 3 :Eu 3+ phosphor films in the last few years [1][2][3][4][5][6][7][8]- [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

“…Developing the process conditions is necessary for each preparation method because only the phosphor films prepared in optimum process conditions can achieve highest efficiency. The Y 2 O 3 :Eu 3+ phosphor films have been prepared by using the deposition method such as pulsed laser deposition [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]- [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], sputtering [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]…”