基于NaGdF_(4)∶Er^(3+)/Yb^(3+)/Al^(3+)的复合薄膜上转换发光与光热性能  

Upconversion Luminescence and Photothermal Properties of Composite Films Based on NaGdF4∶Er^(3+)/Yb^(3+)/Al^(3+)

作　　者：邵泽杰 周海芳[1] 郑瑞锦 程树英[1] SHAO Zejie;ZHOU Haifang;ZHENG Ruijin;CHENG Shuying(School of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学物理与信息工程学院,福建福州350108

出　　处：《发光学报》2025年第1期89-97,共9页Chinese Journal of Luminescence

基　　金：国家自然科学基金(52372183);福建省自然科学基金(2021J01582)。

摘　　要：稀土掺杂的上转换纳米材料在光热传感、生物医学等领域有着广泛的应用前景,但其存在导热性差、测温灵敏度与上转换发光(UCL)强度低的问题,而添加单壁碳纳米管(SWCNT)、贵金属与光子晶体(PCs)是提高其UCL强度与光热性能的有效手段。本文使用溶剂热法合成了NaGdF_(4)∶Er^(3+)/Yb^(3+)/Al^(3+)纳米晶体(UCNPs),通过对比上转换层(UC)、SWCNT/UC、Ag/SWCNT/UC与PCs/Ag/SWCNT/UC的光热性能,研究不同膜层对UCNPs的光热性能影响。结果表明,PCs/Ag/SWCNT/UC具有优异的性能,其红绿光强度分别为UC的3.48倍与4.24倍,其光热转换效率达到33.79%,是UC的1.49倍;并且光学测温绝对灵敏度SA在353 K时达到3.14×10^(-3) K^(-1),相对灵敏度SR在273 K时达到1.87×10^(-2) K^(-1)。本研究为提高光热传感器性能提供了一种有效的策略。Rare earth-doped upconversion nanomaterials have wide application prospects in photothermal sensing,biomedicine and so on,but it has poor thermal conductivity,low temperature measurement sensitivity and upconversion luminescence(UCL)intensity.It’s an effective way to improve their UCL intensity and photothermal performance by assembling composite films which contain single-walled carbon nanotubes(SWCNT),noble metal and photonic crystals(PCs).In this work,NaGdF_(4)∶Er^(3+)/Yb^(3+)/Al^(3+)nanocrystalls(UCNPs)were synthesized by the solvothermal method.The photothermal performance of upconversion layer(UC),SWCNT/UC,Ag/SWCNT/UC and PCs/Ag/SWCNT/UC were compared,and the effects of different film layers on the photothermal performance of UCNPs were studied.The results indicate that PCs/Ag/SWCNT/UC has the best performance,and compared with the UC film,the enhancement factors of red and green emission intensities are 3.48 and 4.24 times,respectively.Its photothermal conversion efficiency is 33.79%,which is 1.49 times of UC’s.The absolute sensitivity(SA)of the optical temperature measurement is obtained as 3.14×10^(−3) K^(-1) at 353 K and the relative sensitivity(SR)is obtained as 1.87×10^(−2) K^(-1) at 273 K.The work provides an effective way to improve the performance of the photothermal sensor.

关 键 词：复合薄膜 NaGdF_(4)∶Er^(3+)/Yb^(3+)/Al^(3+)纳米晶 光热性能 测温灵敏度 

分 类 号：O482.31[理学—固体物理]