发光学报, 2020, 41 (1): 1, 网络出版: 2020-02-24
单颗粒稀土纳米晶的三基色上转换发光
Three-primary-color Upconversion in Single Lanthanide Based Nanoparticle
摘要
可调谐发光颜色的上转换荧光纳米粒子具有广阔的应用前景。本文设计并成功合成了结构紧凑的多层核-壳纳米颗粒。在不同波段激光的泵浦下, 该颗粒中不同壳层分别产生红、绿、蓝3种颜色的上转换荧光。光谱测试结果表明, 样品三基色发光的颜色纯度较好, 并且可以实现全色域的颜色实时调节。此外, 还测试了样品发光强度与泵浦功率之间的依赖关系, 用于研究其中的上转换发光机理。这种在单颗粒水平上具有全色域可调发光的紧凑核-壳结构纳米晶体在多通道生物检测及成像、超高分辨率显示器件、高端防伪应用等领域显示出巨大的潜力。
Abstract
Upconversion nanocrystals capable of tunable emitting color have shown wide application prospects. In this paper, we designed and successfully synthesized compact multi-layer core-shell nanocrystals. Different layers in a nanocrystal respectively produce upconversion luminescence with red, green and blue color, excited by various lasers. The emitting color with high purity can be further tuned in real-time within full color range. In addition, the luminescence intensity dependences on the pump power were recorded and used to investigate the luminescence mechanisms. The proposed compact core-shell nanocrystal with tunable color in a single nanoparticle shows great potentials for the applications such as bio-detection and imaging, display devices with ultrahigh resolution and advanced anti-counterfeiting.
孙剑飞, 闫东, 刘禄. 单颗粒稀土纳米晶的三基色上转换发光[J]. 发光学报, 2020, 41(1): 1. SUN Jian-fei, YAN Dong, LIU Lu. Three-primary-color Upconversion in Single Lanthanide Based Nanoparticle[J]. Chinese Journal of Luminescence, 2020, 41(1): 1.