A Novel Multifunctional Upconversion Phosphor: Yb3+/Er3+ Codoped La2S3
A Novel Multifunctional Upconversion Phosphor: Yb3+/Er3+ Codoped La2S3
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新型多功能上转换荧光粉：Yb3/Er3共掺杂La2S3
DOI：
10.1111/jace.12822
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发表时间：
2014-06
影响因子：
3.9
通讯作者：
Mai Yaohua
中科院分区：
文献类型：
--
作者：
Yang Yanmin;Mi Chao;Jiao Fuyun;Su Xianyuan;Li Xiaodong;Liu Linlin;Zhang Jiao;Yu Fang;Liu Yanzhou;Mai Yaohua
采用高温固相法合成了Yb 3 +/Er 3+共掺杂的La 2S 3上转换发光材料。在971-nm激发下，当激发功率密度为16 W/cm 2时，最大发光功率可达0.64 mW，在3 W/cm 2的激发功率密度下，绝对功率产额为0.36%，量子产额（绿色~ 0.18%，红色~ 0.03%，积分~0.21）与NaYF 4：Yb 3+，Er 3+纳米晶（积分~0.005-0.30）相当。在100-900 K温度范围内记录了Er ~（3+）的两个热耦合激发态的频率上转换发射。温度传感的最大灵敏度为0.0075 K−1。随着激发功率密度的增加，基质材料的温度迅速升高，最高温度可达600 K。La 2S 3：Yb 3 +/Er 3+荧光粉具有较强的紫外发射、较高的灵敏度和良好的光热稳定性，有望成为一种具有温度传感和活体成像功能的光热消融癌细胞的复合材料。
Yb3+/Er3+ codoped La2S3 upconversion (UC) phosphors have been synthesized using high‐temperature solid‐state method. Under 971‐nm excitation, the maximum luminescence power can reach 0.64 mW at the excitation power density of 16 W/cm2 and an absolute power yield of 0.36% was determined by an absolute method at the excitation power density of 3 W/cm2, and the quantum yield of La2S3:Yb3+, Er3+ (green ~0.18%, red ~0.03%, integration ~0.21) was comparable to that of NaYF4:Yb3+, Er3+ nanocrystals (integration ~0.005–0.30). Frequency upconverted emissions from two thermally coupled excited states of Er3+ were recorded in the temperature range 100–900 K. The maximum sensitivity of temperature sensing is 0.0075 K−1. As the excitation power density increases, the temperature of host materials rapidly rises and the top temperature can reach to 600 K. Given the intense UC emission, high sensitivity, as well as good photothermal stability, La2S3:Yb3+/Er3+ phosphor can become a promising composite material for photothermal ablation of cancer cells possessing the functions of temperature sensing and in vivo imaging.
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影响因子：
3.2
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
van Veggel, Frank C. J. M.