GdBO_3:Tb^(3+)纳米晶在AAO模板上的水热合成及其发光性质

Hydrothermal Synthesis and Luminescence Properties of Nano-crystalline GdBO_3:Tb^(3+) Assisted with Porous Anodic Aluminum Oxide (AAO) Templates

采用水热合成法在AAO模板上制备了GdBO3:Tb3+绿色发光材料薄膜,并研究了退火温度对产物形貌和发光性质的影响.用XRD、SEM、EDS对GdBO3:Tb3+/AAO样品进行了表征.SEM结果表明,经过600℃、800℃高温退火后,在AAO模板上形成了一层方块形的GdBO3:Tb3+/AAO发光薄膜,600℃是得到具有规则方块形的GdBO3:Tb3+/AAO发光材料薄膜的最佳温度.荧光光谱的结果表明:GdBO3:Tb3+/AAO发光材料薄膜的特征发射为Tb3+5 D4→7F5跃迁发射,其发射强度随着温度的升高而增强.

The GdBO3 ：Tb^3＋/AAO thin films and their patterning were successfully fabricated on the AAO template by a hydrothermal technique, using rare-earth oxides and boric acid as starting materials. It was found that we obtained homogeneous patterned films during the heat treatment process. The crystal structure, morphology, chemical composition and luminescence property of the resulting films were separately investigated by X- ay diffraction （ XRD）, scanning electron microscopy （ SEM ）, energy - dispersive spectrum （ EDS ） and photoluminescence （PL） spectra. The results revealed that the films were highly uniform, smooth and crack- free, composed of GdBO3 ：Tb^3＋ nanocrystals. In order to compare the crystallization, morphology change, and luminescence behavior at different temperatures, the additional heat treatments for GdBO3：Tb^3＋/AAO film were carried out at different temperatures for 10 h. The GdBO3 ：Tb^3＋/AAO films showed dominant green emission at 545 nm due to the ^5D4→^7F5 transition of the Tb^3＋ ions and the intensity of the emission increases with increasing the annealing temperatures from 600 to 800℃.