Open AccessConstructing lattice‐mismatched upconversion luminescence heterojunctions via light welding in seconds
Author(s) -
Gao Dangli,
Wang Peng,
Wu Jialing,
Gao Jie,
Xiao Guoqing,
Cai Anjiang,
Ma Kaiwei
Publication year - 2021
Publication title -
nano select
Language(s) - English
Resource type - Journals
ISSN - 2688-4011
DOI - 10.1002/nano.202000098
Subject(s) - heterojunction , materials science , optoelectronics , laser , fabrication , oxide , welding , luminescence , photonics , nanotechnology , optics , composite material , metallurgy , medicine , physics , alternative medicine , pathology
Heterostructures are an important class of materials with desirable size, morphology, and functionality because of their promising applications in biosensor and photonic communication device. However, no such technology of synthesizing heterojunctions is as convenient as electric welding. Particularly, synthesizing heterojunctions with large lattice‐mismatch has been subjected to a great challenge. Herein, the hybrid heterojunction structures are obtained by in situ chemical transformation from fluoride to oxyfluoride via a laser irradiation‐welding approach (LIWA). Single NaYbF 4 :Ho 3+ @YbOF:Ho 3+ heterojunctions with unique morphologies including hollow spheres, lollipops and sponge‐like plates, are successfully prepared by deliberate control over precursor particles and light welding parameters. These unique luminescent heterojunctions can not only integrate distinctive properties of fluoride and oxide, but also exhibit the unprecedented convenience for color tunability. This work provides an ultrafast LIWA for the fabrication of lattice‐mismatched heterojunctions in seconds, and LIWA allows tunable laser parameters to control the microstructures and characteristics of heterojunctions for widespread applications.