排序方式: 共有3条查询结果,搜索用时 46 毫秒
1
1.
A novel strong green phosphor: K3Gd(PO4)2:Ce^3+, Tb^3+ for a UV-excited white light-emitting-diode 下载免费PDF全文
A series of K3Gd1-x-y(PO4)2:xCe^3+, yTb^3+ phosphors are synthesized by the solid-sate reaction method. X-ray diffraction and photoluminescence spectra are utilized to characterize the structures and luminescence properties of the as-synthesized phosphors. Co-doping of Ce^3+ enhances the emission intensity of Tb^3+ greatly through an efficient energy transfer process from Ce^3+ to Tb^3+. The energy transfer is confirmed by photoluminescence spectra and decay time curves analysis. The efficiency and mechanism of energy transfer are investigated carefully. Moreover, due to the non- concentration quenching property of K3Tb(PO4)2, the photoluminescence spectra of K3Tb1-x(PO4)2:xCe^3+ are studied and the results show that when x = 0.11 the strongest Tb^3+ green emission can be realized. 相似文献
2.
3.
Characterization and luminescence of Eu/Sm-coactivated CaYAl3O7 phosphor synthesized by using a combustion method 下载免费PDF全文
A novel red-emitting phosphor, CaYAl3O7 : Eu 3+ , Sm3+ , is synthesized by a combustion method at a low temperature (850℃), and the single phase of CaYAl3O7 is confirmed by powder X-ray diffraction measurements. The photoluminescence property results reveal that the red emission intensity of Eu3+ is strongly dependent on the Sm3+ concentration. Only the Eu 3+ luminescence is detected in the Eu 3+ -Sm3+ co-doped CaYAl3O7 phosphor with 393 nm excitation. However, under the characteristic excitation (402 nm) of Sm3+ , not only the Sm3+ emission but also the Eu 3+ emission are observed. A possible mechanism of the energy transfer between Sm3+ and Eu 3+ is investigated in detail. 相似文献
1