Advances in Multi-dimensional Control of Upconversion Emission from Er3+-riched Nanocrystals

作者：闫龙 Yan Long, Chong‐Geng Ma, Bo Zhou · 发表于：Chinese Journal of Luminescence · 年份：2024 · DOI：10.37188/cjl.20240230 · 被引用次数：1 · 研究领域：Luminescence Properties of Advanced Materials、Radiation Detection and Scintillator Technologies、Luminescence and Fluorescent Materials

Over recent years， research into the upconversion luminescence properties of highly doped Er 3+ nanocrystals has undergone rapid advancement.Compared to traditional doping materials， these materials exhibit unique features such as multi-band excitation， strong excitation wavelength penetration， dynamic control over optical color， and highly sensitive to external field stimuli， showing great promise in various research domains including optical information security， temperature sensing， and bioimaging.This review provides a comprehensive overview of the techniques for tuning upconversion luminescence intensity， emission colors， decay characteristics， and excitation bands through ways of such as matrix composition， structural design， and energy transfer processes.Additionally， we explore the impact of external field stimuli such as temperature， pressure， and metal surface electric fields on the luminescence properties of highly Er 3+ doped nanocrystals.The mechanisms behind luminescence enhancement are discussed in terms of increased multiphoton transition probabilities and reduced non-radiative energy losses.Finally， we summarize the research on modulating excitation modes in highly doped Er 3+ nanocrystals and propose directions for future investigations.