A Study on the Synthesis﹐Microstructures and Luminescent of Rare-earth Activated Oxysulfide Nanophosphors

• Main Authors: Bo-Chang Yan, 顏伯昌
• Other Authors: Teng-Ming Chen
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/33447118541110628018

碩士 === 國立交通大學 === 應用化學系 === 91 === This research demonstrated the successful synthesis of two series of rare-earth (i.e., Eu3+, Tb3+, Pr3+, Sm3+, Dy3+) -activated R2O2S (R = Y, Gd) via a solvothermal route at 150℃, followed by H2S-annealing at elevated temperatures (i.e., 300-700℃). To establish the appropriate processing conditions, we have investigated the microstructure and luminescent properties of R2O2S nanophosphors, as a function of source and concentration of starting materials, synthetic temperature, solvents and their filling rate, activator concentration and surface modification. As indicated by TEM image analyses, spherical (60 nm in diameter) and rod-shaped (10 nm in diameter and 1.5 m in length) nanophosphors of Y2O2S:Tb have been prepared by solvothermal reactions using methanol (MeOH) and ethylenediamine (en) as a solvent, respectively, followed by H2S annealing.. Furthermore, a rod-shaped nanophosphor of Y2O2S:Tb with 30 nm in diameter and 1.5 m in length has been synthesized by using MeOH/en mixture (50:50, v/v) as a solvent. On the other hand, rod-shaped nanophosphors of Gd2O2S:Tb with 20 nm and 4 m in diameter and length, respectively, have been obtained by using en as a solvent in a solvothermal reaction.