Ontology highlight
ABSTRACT:
SUBMITTER: Han Q
PROVIDER: S-EPMC5511274 | biostudies-other | 2017 Jul
REPOSITORIES: biostudies-other
Han Qingyan Q Zhang Chengyun C Wang Chi C Wang Zhaojin Z Li Caixia C Gao Wei W Dong Jun J He Enjie E Zhang Zhenglong Z Zheng Hairong H
Scientific reports 20170714 1
A new design of peculiar-shaped β-NaYF<sub>4</sub>: 20% Yb<sup>3+</sup>/2% Er<sup>3+</sup> hexagonal microcrystal (PSβHM) is proposed and its upconversion (UC) luminescence with adjustable color pattern is studied with near infrared excitation. Flower-like green UC luminescence emission pattern from blooming to withering process and intensive directional red emission are achieved by simply adjusting the focal point position of the excitation light. The mechanism that determines the unique UC lum ...[more]