Preparation and Properties of YPO_4:Tb³⁺ Fluorescent Material with Polyacrylamide Gel Method AITranslate

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Chinese Library Classification Number:O614.33[理学—无机化学]

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Tb3＋ doped YPO4 samples were successfully synthesized with a polyacrylamide gel method. The crystal structure, particle size,morphology and luminescence properties of the as-synthesized samples were investigated by XRD,TEM and PL. The effects of Tb3＋ doping concentration,the precursor solution pH and the molar ratio between RE （RE=Y and Tb） and P on the phase structure and luminescence properties of the products were investigated. The results show that the single-phase tetragonal YPO4 ： Tb3＋ crystal with particle size of about 6- 10 nm can be obtained with polyacrylamide gel method. The photoluminescence spectra of Tb3＋ doped YPO4 samples show a characteristic green luminescence of Th3＋ under 222 nm UV light excitation. Furthermore,the concentration quenching is observed when the Tb3＋ doping concentration is over 60% ,indicating that the n（Y＋Tb）/n（P） has a significant influence on the phase structure and luminescence properties of the samples, while precursor solution pH only affects their luminescence properties. Under the conditions of n（Y＋Tb）/n（P）=l ： 1 and pH=6,the products of high luminescence intensity can be obtained.