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亮化向上转换纳米粒子

Xingxu Liu^1,2, Chang Jiang^1,2, Guanying Chen^1,2

¹MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.

Accounts of chemical research

|March 3, 2026

概括

由于内在和外在因素,用兰化物添加的升级转化纳米粒子 (UCNPs) 显示出微弱的辐射. 诸如染料敏感化和核心外架构等策略显著提高了UCNP对高级应用的亮度.

科学领域:

纳米材料科学科学纳米材料科学
光子学是一个光子学.
量子化学是一个量子化学.

背景情况:

用兰化物添加的升级转化纳米粒子 (UCNPs) 通过多光子过程将近红外 (NIR) 光转化为更高能量的可见/紫外线辐射.
UCNP在生物成像,疗法,生物传感和显微镜方面都有应用,但它们的低上转换亮度限制了广泛使用.
微弱的排放源于低胺吸收/辐射速率以及表面火和度火等外部因素.

研究的目的:

审查和提出战略,以提高兰化物合纳米粒子的上转换亮度.
突出最近的进展,专注于内在和外在的工程方法.
为了深入了解能源转移动态,设计更明亮的UCNPs.

主要方法:

内在增强:将UCNP与NIR吸收染料敏感剂相结合,以改善光采集.
等离子合通过普尔塞尔效应加速辐射衰变.
外在增强:利用核心-超厚外架构和离子的空间分离.

主要成果:

染料敏感化实现了超过4个数量级的排放增强.
核心纳米结构使转化量子产量 (UCQY) 提高到13%,并增加了度灭值.
光子雪崩过程证明了强烈的向上转换辐射的超高阶非线性.

结论:

内在和外在的工程策略都有效地提高了UCNP的亮度.
先进的纳米结构和敏感化方法显著克服了UCNP的局限性.
这些进步为为各种应用开发下一代明亮的UCNP铺平了道路.

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