研究目的
Investigating the energy transfer from Bi3+ to Tb3+ in Y2O3 phosphor for the production of green light under N-UV excitation and its application in white-light-emitting diodes (W-LEDs).
研究成果
The Y2O3 phosphors doped with Tb3+ and Bi3+ were successfully synthesized and characterized. The energy transfer from Bi3+ to Tb3+ enhances the excitation efficiency in the N-UV region, making the phosphors suitable for N-UV excited LED applications. The materials show potential as UV-LED converted phosphors in white-lighting technology.
研究不足
The study focuses on the energy transfer mechanism and luminescent properties under N-UV excitation, but the practical application in W-LEDs may require further optimization for efficiency and stability.
1：Experimental Design and Method Selection:
The phosphors were synthesized by co-precipitation method using oxalic acid. The crystalline phases were identified by XRD, and photoluminescence (PL) spectra were measured at room temperature.
2：Sample Selection and Data Sources:
Y2O3 (
3：99%), Tb4O7 (99%), and Bi(NO3)3·5H2O (Merck, AR) were used as starting materials. List of Experimental Equipment and Materials:
Philips PANalytical X’pert Pro diffractometer for XRD, Hitachi F-4000 fluorescence spectrophotometer for PL measurements.
4：Experimental Procedures and Operational Workflow:
The materials were dissolved in dil. HNO3, mixed, and oxalic acid solution was added to form a precipitate, which was then dried and heated to yield the phosphor.
5：Data Analysis Methods:
The PL spectra were analyzed to understand the energy transfer mechanism from Bi3+ to Tb3+.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
