研究目的
Investigating the photoluminescent properties and local structure of Tb doped fibrous alumina to find out the optimal conditions for preparation of the PL device.
研究成果
Photoluminescent alumina films made from a sol containing fibrous boehmite nanoparticles and Tb nitrate emitted bright green light under UV irradiation. Optimal PL performance was achieved with samples treated around 800°C and with lower Tb content. Structural analysis revealed that isolated Tb ions on alumina surface exhibited high PL performance, whereas aggregated Tb oxide nanoparticles had lower efficiency.
研究不足
The study was limited by the quality of EXAFS spectra for samples with low Tb content, making it difficult to determine an absolute coordination number for Tb-O. Additionally, the formation of Tb oxide nanoparticles in densely doped samples reduced PL efficiency.
1：Experimental Design and Method Selection
The study involved doping Tb ions into a boehmite sol to create photoluminescent films. The methodology included PL measurements, XRD, XAFS, and TEM observations to analyze the structure and properties of the doped alumina.
2：Sample Selection and Data Sources
Samples were prepared by adding aqueous solution of Tb(NO3)3·6H2O to the diluted boehmite sol. The atomic ratio of Tb/Al was varied from 0.5/99.5 to 5/95.
3：List of Experimental Equipment and Materials
JASCO FP-8500 for PL measurements, SmartLab X-ray diffractometer for XRD, FEI Tecnai Osiris TEM for observation, and BL9A, 9C, and 12 C at the Photon Factory for XAFS measurements.
4：Experimental Procedures and Operational Workflow
The boehmite sol was doped with Tb ions, dried to form films, and calcined at various temperatures. PL measurements were conducted, and structural analysis was performed using XRD, XAFS, and TEM.
5：Data Analysis Methods
PL spectra were analyzed for emission peaks, XRD patterns for crystal phase determination, XAFS for local structure around Tb, and TEM for morphology and distribution of Tb.
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
