Synthesis and Luminescent Properties of Ca3La(BO3)3：Tb3+Phosphor

LI Qi-hua; LIU Li-min; ZENG Li-hua; LEI Chun-hua; CAO Xiao-mei; PENG Yi-an; LIAN Shi-xun

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Synthesis and Luminescent Properties of Ca₃La(BO₃)₃：Tb³⁺Phosphor

更新时间：2020-08-11

- Synthesis and Luminescent Properties of Ca₃La(BO₃)₃：Tb³⁺Phosphor
- Chinese Journal of Luminescence Vol. 27, Issue 2, Pages: 183-186(2006)
- 作者机构：
  
  1. 湖南师范大学, 化学化工学院,湖南长沙,410081
  2. 湖南师范大学, 化学生物学及中药分析省部共建教育部重点实验室,湖南长沙,410081
- 作者简介：
- 基金信息：
- DOI：
  CLC： O482.31
- Received：31 May 2005，
  
  Revised：2005-8-28，
  
  Published：20 March 2006
- 稿件说明：
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李其华, 刘利民, 曾立华, 雷春华, 曹小妹, 彭夷安, 廉世勋. Ca3La(BO3)3：Tb3+的合成与发光性质[J]. 发光学报, 2006,27(2): 183-186

LI Qi-hua, LIU Li-min, ZENG Li-hua, LEI Chun-hua, CAO Xiao-mei, PENG Yi-an, LIAN Shi-xun. Synthesis and Luminescent Properties of Ca3La(BO3)3：Tb3+Phosphor[J]. Chinese Journal of Luminescence, 2006,27(2): 183-186
李其华, 刘利民, 曾立华, 雷春华, 曹小妹, 彭夷安, 廉世勋. Ca3La(BO3)3：Tb3+的合成与发光性质[J]. 发光学报, 2006,27(2): 183-186 DOI：

LI Qi-hua, LIU Li-min, ZENG Li-hua, LEI Chun-hua, CAO Xiao-mei, PENG Yi-an, LIAN Shi-xun. Synthesis and Luminescent Properties of Ca3La(BO3)3：Tb3+Phosphor[J]. Chinese Journal of Luminescence, 2006,27(2): 183-186 DOI：

摘要

高温固相反应法合成了Ca

La(BO

)

:Tb

光致发光材料。利用扫描电镜和激光衍射分析仪测定了样品的晶粒形貌及粒径大小分布

利用荧光分光光度计研究了Ca

La(BO

)

:Tb

的光致发光特性。确定了在Ca

La(BO

)

基质中Tb

离子浓度对其发光强度的影响及其自身浓度猝灭机理;探讨了助熔剂Li

、敏化剂Ce

离子的加入对荧光粉发光强度的影响。

Abstract

For many years

the borate luminescence materials have been paid much attention owing to their properties of low preparation temperature and high luminescent efficiency.In order to search for the new green-photoluminescence material

La(BO

)

:Tb

was synthesized by high temperature solid state reaction at a weak reductive atmosphere which was made by the active carbon powder.The samples had been characterized by scanning electron microscopy(SEM)

laser-diffraction size analyzer and fluorospectrophotometer.The results showed that most of the crystals were cylindric and the(average) size of the crystals was about 41 m.Excitation and emission spectrum of the Ca

La(BO

)

:Tb

and Ca

La(BO

)

:Tb

phosphors were measured by the fluorospectrophotometer at room temperature.In analysis of the emission spectrum for Ca

La(BO

)

:Tb

under 254 nm excitation at room temperature

there are four main emission peaks at 496

549

594

628 nm

among which the intensity of the 549 nm line is the highest.They belonged to the characteristic emission of Tb

ions.Besides

the luminescent intensity of the Ca

La(BO

)

:Tb

powder changed along with different concentrations of Tb

ions

and the optimum concentration of Tb

in Ca

La(BO

)

is x(Tb)=0.25.According to the dependence of the concentration of Tb

in Ca

La(BO

)

under the excitation of 251 nm

it was confirmed that the mechanism of concentration selfquenching of Tb

transition is electric dipole-dipole interaction.The influence of Ce

on the emission intensity of Tb

was also investigated

after adding low concentration of Ce

to the system of Ca

La-(BO

)

:Tb

the luminescence intensity increased only slightly

so Ce

may not be a good sensitizer to Tb

in Ca

La(BO

)

.In addition

it has been confirmed that when a flux

was added

the 549nm emission corresponding to

transition was intensified greatly.Ca

La(BO

)

:Tb

phosphor could absorb ultraviolet radiation and emit green light.Compared with the former results of other borate luminescent materials

when Ca

La(BO

)

:Tb

phosphor was excited by 254 nm UV light

stable and much stronger green light could be emitted

so it is promising to apply in the production of green fluorescent lamp.

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