由La(0.45)Yb(0.50)Er(0.05)F(3)纳米颗粒制备的二氧化硅溶胶-凝胶薄膜产生的近红外（NIR）到红色和绿色的上转换发射，异质环增强能量转移（Hetero-LEET）：一种新的上转换过程。

Near-infrared (NIR) to red and green up-conversion emission from silica sol-gel thin films made with La(0.45)Yb(0.50)Er(0.05)F(3) nanoparticles, hetero-looping-enhanced energy transfer (Hetero-LEET): a new up-conversion process.

作者信息

Sivakumar Sri, van Veggel Frank C J M, May P Stanley

机构信息

Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, British Columbia, Canada.

出版信息

J Am Chem Soc. 2007 Jan 24;129(3):620-5. doi: 10.1021/ja065378x.

DOI:10.1021/ja065378x

PMID:17227025

Abstract

Bright green and red luminescence has been generated with a 980 nm diode laser from silica sol-gel thin films made with La0.45Yb0.50Er0.05F3 nanoparticles through a newly described hetero-looping-enhanced energy-transfer (hetero-LEET) up-conversion process, which exhibits a power dependence similar to that of a photon avalanche (PA). The hetero-LEET mechanism is potentially more efficient than PA, ground-state absorption/excited-state absorption (GSA/ESA), and energy-transfer (ETU) mechanisms because it combines resonant ground-state absorption with a looping or feedback process.

摘要

通过一种新描述的杂环增强能量转移（hetero-LEET）上转换过程，用980纳米二极管激光器从含有La0.45Yb0.50Er0.05F3纳米颗粒的硅溶胶 - 凝胶薄膜中产生了亮绿色和红色发光，该过程表现出与光子雪崩（PA）相似的功率依赖性。杂环增强能量转移（hetero-LEET）机制可能比光子雪崩（PA）、基态吸收/激发态吸收（GSA/ESA）和能量转移（ETU）机制更有效，因为它将共振基态吸收与循环或反馈过程相结合。