化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (7) : 159-162.

科学研究

Sr₂YF₇∶Yb,Tm纳米晶的水热制备及上转换发光性能研究

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Study on hydrothermal preparation and upconversion luminescence property of Sr₂YF₇∶Yb,Tm nanocrystal

Zhong Cheng¹, Luo Ran², Li Tao², Zhang Ting¹, Lai Xin², Bi Jian², Gao Daojiang²

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Received		Published
2018-03-06		2019-07-20
Issue Date	Revised Date
2019-08-05	2018-03-06

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摘要

采用温和水热法制备了七氟钇锶(Sr₂YF₇)∶镱(Yb),铥(Tm)纳米晶(Sr₂YF₇∶Yb,Tm纳米晶),并对其微结构、形貌、粒径、发光性能进行了表征。结果显示,制备的Sr₂YF₇∶Yb,Tm纳米晶为四方晶相结构,其形貌为类球型,平均粒径34nm;在980nm红外光激发下,其发射峰分别位于463nm、480nm、650nm处,I_蓝/I_红≈43,无紫外及红外发射峰出现,获得了上转换单色蓝光。依据发光强度与激发功率的关系,确定样品的蓝光与红光发射均为三光子过程,并分析了其上转换发光机制。

Abstract

Sr₂YF₇∶Yb,Tm nanocrystals were synthesized by a mild hydrothermal method.The microstructures,morphologies,particle sizes and luminescence properties of as-prepared nanocrystals were characterized.The results showed that as-prepared nanocrystals possessed pure tetragonal structure,spherical shape and average size of about 34nm.Emissions centered at around 463,480 and 650nm upon exciting with a 980nm laser diode,I_blue/I_red≈43,No UV and IR peaks were detected,and the upconversion monochromatic blue light was observed.According to the relationship between luminescence intensity and excitation power,the blue and red upconversion luminescence of as-prepared products was come from three-photon energy transfer process,the upconversion mechanism was discussed in detail.

关键词

蓝光 / 七氟钇锶 / 铥离子 / 水热法 / 上转换机制

Key words

blue light / Sr₂YF₇ / Tm³⁺ / hydrothermal method / upconversion mechanism

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Sr₂YF₇∶Yb,Tm纳米晶的水热制备及上转换发光性能研究[J]. 化工新型材料, 2019, 47(7): 159-162 DOI:

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