Tuning the Upconversion Luminescence Lifetimes of KYb2F7:Ho3+ Nanocrystals for Optical Multiplexing. Issue 18 (19th October 2015)

• Record Type: Journal Article
• Authors: Ding, Mingye; Chen, Daqin; Ma, Danyang; Liu, Peng; Song, Kaixin; Lu, Hongwei; Ji, Zhenguo
• Is Part Of: Chemphyschem. Volume 16:Issue 18(2015)
• Page Start: 3784
• Page End: 3789
• Publication Date: 2015-10-19
• Subjects: emission decay -- luminescence -- nanocrystals -- optical multiplexing -- upconversion; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201500795
• Languages: English
• ISSNs: 1439-4235

Abstract

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. Abstract : Lifetime tuning : The authors demonstrate the possibility to create a new temporal coding dimension (from microseconds to milliseconds) by manipulating the emission decay lifetimes of KYb2 F7 :Ho 3+ nanocrystals.