文章信息/Info

Title:

Synthesis and Luminescence Properties of Gd2O2S∶Pr3+ Phosphors

作者:

連景寶; 劉凡; 張靜; 楊彥宇; 王旭日; 張兆任

遼寧石油化工大學機械工程學院

Author(s):

LIAN Jingbao;  LIU Fan;  ZHANG Jing;  YANG Yanyu;  WANG Xuri;  ZHANG Zhaoren

School of Mechanical Engineering, Liaoning Shihua University

關鍵詞:

硫氧化釓; 熒光粉; 共沉淀; 還原法; 發光性能

DOI:

10.7502/j.issn.1674-3962.2016.05.10

文獻標志碼:

A

摘要:

采用Gd(NO3)3、Pr6O11、HNO3、(NH4)2SO4和NH3·H2O為實驗原料，通過共沉淀還原法合成了Gd2O2S∶Pr3+熒光粉。利用傅里葉變換紅外光譜（FT�睮R）、X射線衍射（XRD）、掃描電子顯微鏡（SEM）和光致發光（PL）等手段對合成產物進行了表征。結果表明前驅體具有非晶態結構，在空氣氣氛中800 ℃煅燒2 h能轉化為單相的Gd2O2SO4粉體，該粉體在氬氫混合氣氛下800 ℃煅燒1 h能轉化為單相的Gd2O2S粉體。Gd2O2S粉體呈準球形，粒徑大約1 μm左右，團聚嚴重。PL光譜分析表明在303 nm的紫外光激發下，Gd2O2S∶Pr3+熒光粉呈綠光發射，主發射峰位于514 nm，歸屬于Pr3+離子的3P0-3H4躍遷，Pr3+離子的猝滅濃度為1mol%。

Abstract:

A co�瞤recipitation reduction method for synthesizing Gd2O2S∶Pr3+ phosphors was developed, using Gd(NO3)3·6H2O, Pr6O11, HNO3, (NH4)2SO4 and NH3·H2O as the starting materials. The characterizations of the synthetic products were obtained by fourier transform infrared spectroscopy (FT�睮R), X�瞨ay diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) spectroscopy. The results revealed that the as synthesized precursor has noncrystalline structure and could be transformed into single phase Gd2O2SO4 by calcining at 800 oC for 2 h in air. By calcining the Gd2O2SO4 at 800 oC for 1 h in argon and hydrogen mixed atmosphere, pure Gd2O2S phase can be synthesized and this phosphor particles are quasi�瞫pherical in shape, serious aggregation and about 1 μm in size. PL spectra of the Gd2O2S∶Pr3+ phosphors under 303 nm ultraviolet light excitation show a green emission at 514 nm as the most prominent peak, which attributes to the 3P0-3H4 transition of Pr3+ ions. Moreover, the quenching concentration of Pr3+ ions is 1mol%.