Sol-Gel Preparation and Luminescence Properties of BaMgAl10O17∶Eu2+ Phosphors
来源期刊：JOURNAL OF RARE EARTHS2006年第6期
论文作者：Chung-Tao Chen Chung-Hsin Lu Baibaswata Bhattacharjee
Key words：phosphors; sol-gel; synthesis; luminescent properties; rare earths;
Abstract: The synthesis of BaMgAl10O17∶ Eu2+ (BAM) phosphors using the sol-gel method and their luminescence properties were reported. The blue-light emitting BAM was synthesized using citric acid and ethylene glycol as chelating materials. Emission of blue-light was obtained from these phosphors. The luminescent intensity increases as the temperature of heat treatment is increased. This study investigated the effects of the molar ratio of ethylene glycol to citric acid (Φ value), with respect to the phase formation and luminescence properties of BAM. The variation of the Φ value resulted in the change of the sol-gel reaction mechanism and the microstructures of the resultant powders. An increase in Φ value leads to an increase in the rate of BAM phase formation. The photoluminescent intensity of the prepared phosphors increases with heating temperatures because of enhanced crystallization.
Chung-Tao Chen1，Chung-Hsin Lu1，Baibaswata Bhattacharjee2
(1.Department of Chemical Engineering, National Taiwan University, Taipei, China;
2.Department of Physics, Ramananda College, Bishnupur, Bankura, West Bengal, India, 722 122)
Abstract:The synthesis of BaMgAl10O17∶ Eu2+ (BAM) phosphors using the sol-gel method and their luminescence properties were reported. The blue-light emitting BAM was synthesized using citric acid and ethylene glycol as chelating materials. Emission of blue-light was obtained from these phosphors. The luminescent intensity increases as the temperature of heat treatment is increased. This study investigated the effects of the molar ratio of ethylene glycol to citric acid (Φ value), with respect to the phase formation and luminescence properties of BAM. The variation of the Φ value resulted in the change of the sol-gel reaction mechanism and the microstructures of the resultant powders. An increase in Φ value leads to an increase in the rate of BAM phase formation. The photoluminescent intensity of the prepared phosphors increases with heating temperatures because of enhanced crystallization.
Key words:phosphors; sol-gel; synthesis; luminescent properties; rare earths;
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