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Updated: Sep 20, 2025

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

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Achieving Multicolor Upconversion Emissions without Changing Compositions.

Chao Gao¹, Zhiqian Song¹, Yingxue Li¹

¹School of Inspection and Testing Certification, Changzhou Vocational Institute of Engineering, 213164, Changzhou, China.

Journal of Fluorescence

|June 6, 2022

Summary

This summary is machine-generated.

This study presents a novel method for tuning upconversion crystal fluorescence color by adjusting excitation power density, avoiding complex synthesis. This offers a promising approach for anti-counterfeiting and display technologies.

Keywords:

Emission color Laser power Photoluminescence Upconversion

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Area of Science:

Materials Science
Photonics
Solid-State Chemistry

Background:

Adjusting fluorescence color is crucial for upconversion materials in applications like anti-counterfeiting and displays.
Traditional methods require complex synthesis, consuming time and resources.

Purpose of the Study:

To develop a facile method for wide luminous color gamut tuning in upconversion crystals.
To explore excitation power density as a parameter for controlling fluorescence color without altering synthesis.

Main Methods:

Designed and synthesized hexagonal NaLuF4:Yb3+/Er3+ (50/2 mol%) upconversion crystals with high sensitizer concentration.
Modulated excitation power densities to tune the red-to-green emission intensity ratio.

Main Results:

Achieved convenient tuning of the red-to-green emission intensity ratio from 2.69 to 4.96 by altering excitation power densities.
Observed a promoted three-photon-population process for red emission at high excitation power densities.

Conclusions:

Excitation power density can effectively modulate upconversion emission color in a single host material.
The developed NaLuF4:Yb3+/Er3+ crystals exhibit high excitation power sensitivity, suitable for anti-fake and colorful display applications.