基于NaGdF4:eR3+/Yb3+/AI3+的复合薄膜上转换发光与光热性能

打开文本图片集

关键词：复合薄膜；NaGdF4：Er/Yb/Al纳米晶；光热性能；测温灵敏度中图分类号：0482.31 文献标识码：ADOI：10.37188/CJL.20240221 CSTR：32170.14.CJL.20240221

UpconversionLuminescenceand Photothermal Propertiesof Composite FilmsBased on NaGdF4：Er³+/Yb？+/AI3+

SHAO Zejie， ZHOU Haifang*， ZHENG Ruijin，CHENG Shuying （SchoolofPhysicsandInformation Engineering，Fuzhou University，Fuzhou35o1o8，China） *Corresponding Author，E-mail：zhhafa@163.com

Abstract：Rare earth-doped upconversion nanomaterials have wide application prospects in photothermal sensing， biomedicineand soon，butithas poorthermal conductivity，low temperature measurementsensitivityand upconversionluminescence（UCL）intensity.It’sanefective waytoimprove their UCLintensityandphotothermal performance by assembling composite films which contain single-walled carbon nanotubes（SWCNT），noble metaland photonic crystals（PCs）. In this work，NaGdF ： Er/Yb'+/Al³+ 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 efects of diffrent film layers onthe photothermal performance of UCNPs were studied.The results indicatethat PCs/Ag/SWCNT/UC has the best performance，and compared with the UC film，the enhancementfactorsof redand green emissionintensities are3.48and 4.24times，respectively.Itsphotothermal conversion efficiency is 33.79 % ，whichis1.49 timesofUC’s.Theabsolute sensitivity（ ）of the optical temperature measurement is obtained as 3. at 353Kand therelative sensitivity（ ）is obtained as1 at 273 K. The work provides an effctive way to improve the performance of the photothermal sensor.

KeyWords：composite films；NaGdF4：Er/Yb/Al3nanocrystals；photothermal performance；temperaturemeasurement sensitivity

1引言

镧系掺杂的上转换纳米粒子能将近红外光转换为可见光，且具有发光寿命长、低毒性、光稳定性强等优点，在生物医学2、光学测温[3-4]、太阳能电池等领域有着巨大的应用潜力。（剩余13935字）