title: Tuning the Upconversion Luminescence Lifetimes of KYb2 F7 :Ho(3+) Nanocrystals for Optical Multiplexing.
abstract: Conventional luminescent color coding is limited by spectral overlap and the interference of background fluorescence, thus restricting the number of distinguishable identities that can be used in practice. Here, we demonstrate the possibility of generating diverse time-domain codes, specially designed for a single emission band, using lanthanide-doped upconversion nanocrystals. Based on the knowledge of concentration quenching, the upconversion luminescence kinetics of KYb2 F7 : Ho(3+) nanocrystals can be precisely controlled by modifying the dopant concentration of Ho(3+) ions, resulting in a tunable emission lifetime from 75.8 to 1944.5 μs, which suggests the practicality of these time-domain codes for optical multiplexing.
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, P. R. China.
authors.forename: Mingye
authors.initials: M
authors.lastname: Ding
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, P. R. China. dqchen@hdu.edu.cn.
authors.forename: Daqin
authors.initials: D
authors.lastname: Chen
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, P. R. China.
authors.forename: Danyang
authors.initials: D
authors.lastname: Ma
authors.affiliation: College of Electronics and Information Engineering, Hangzhou Dianzi University, Hangzhou, 310018, P. R. China.
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.affiliation: College of Electronics and Information Engineering, Hangzhou Dianzi University, Hangzhou, 310018, P. R. China.
authors.forename: Kaixin
authors.initials: K
authors.lastname: Song
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, P. R. China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Lu
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, P. R. China.
authors.forename: Zhenguo
authors.initials: Z
authors.lastname: Ji
mesh_terms: D006695:Holmium / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles; D013057:Spectrum Analysis / Q000379:methods*
chemical_list: D006695:Holmium
keywords: emission decay; luminescence; nanocrystals; optical multiplexing; upconversion