Power-Dependent Optimal Concentrations of Tm3+ and Yb3+ in Upconversion Nanoparticles

Wen, Shihui1; Li, Du1; Liu, Yongtao1; Chen, Chaohao1; Wang, Fan1; Zhou, Jiajia1; Bao, Guochen1; Zhang, Le1; Jin, Dayong1,2

2022-06-08

10.1021/acs.jpclett.2c01186

Journal of Physical Chemistry Letters   Impact Factor & Quartile

1948-7185

Lanthanide-doped upconversion nanoparticles (UCNPs) have enabled a broad range of emerging nanophotonics and biophotonics applications. Here, we provide a quantitative guide to the optimum concentrations of Yb3+ sensitizer and Tm3+ emitter ions, highly dependent on the excitation power densities. To achieve this, we fabricate the inertcore@active-shell@inert-shell architecture to sandwich the same volume of the optically active section. Our results show that highly doped UCNPs enable an approximately 18-fold enhancement in brightness over that of conventional ones. Increasing the Tm3+ concentration improves the brightness by 6 times and increases the NIR/blue ratio by 11 times, while the increase of Yb3+ concentration enhances the brightness by 3 times and only slightly affects the NIR/blue ratio. Moreover, the optimal doping concentration of Tm3+ varies from 2% to 16%, which is highly dependent on the excitation power density ranging from 10(2) to 10(7) W/cm(2). This work provides a guideline for designing bright UCNPs under different excitation conditions.

SCI ; EI

English

NI Journal Papers

Others

Australian Research Council (ARC) Discovery Early Career Researcher Award Scheme[DE220100846] ; ARC Laureate Fellowship Program[FL210100180] ; National Natural Science Foundation of China (NSFC)[61729501] ; Major International (Regional) Joint Research Project of NSFC[51720105015] ; Science and Technology Innovation Commission of Shenzhen[KQTD20170810110913065] ; Australia China Science and Research Fund Joint Research Centre for Point-of-Care Testing["ACSRF658277","SQ2017YFGH001190"]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical

WOS:000813442800001

AMER CHEMICAL SOC

Web of Science

1.Univ Technol Sydney, Inst Biomed Mat & Devices IBMD, Sch Math & Phys Sci, Fac Sci, Sydney, NSW 2007, Australia
2.Southern Univ Sci & Technol, UTSS UStech Joint Res Ctr Biomed Mat & Devices, Dept Biomed Engn, Shenzhen 518055, Peoples R China

Wen, Shihui,Li, Du,Liu, Yongtao,et al. Power-Dependent Optimal Concentrations of Tm3+ and Yb3+ in Upconversion Nanoparticles[J]. Journal of Physical Chemistry Letters,2022,13(23).

Wen, Shihui.,Li, Du.,Liu, Yongtao.,Chen, Chaohao.,Wang, Fan.,...&Jin, Dayong.(2022).Power-Dependent Optimal Concentrations of Tm3+ and Yb3+ in Upconversion Nanoparticles.Journal of Physical Chemistry Letters,13(23).

Wen, Shihui,et al."Power-Dependent Optimal Concentrations of Tm3+ and Yb3+ in Upconversion Nanoparticles".Journal of Physical Chemistry Letters 13.23(2022).