Yeqi Liu
(, ), Xiangzhou Zhang
(, ), Jun Wei
(, ), Xiaojia Wang
(, ), Yuhai Zhang
(, )
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引用次数: 0
Abstract
While the hexagonal-phase CsCdCl3 was extensively reported due to its high photoluminescence quantum yield and ultralong afterglow duration, the cubic-phase CsCdCl3 remained elusive. Herein, the cubic-phase CsCdCl3 microcrystals were synthesized via a solid-state synthesis at room temperature. After 10%-Mn2+ doping, the photo-luminescence quantum yield (PL QY) was improved to near unity and the afterglow duration was extended to 10 h. Importantly, the cubic phase was found meta-stable toward thermal treatment, where a transition to hexagonal phase was observed upon heating at 100 °C. In addition, the phase transition was also sensitive to Mn2+-doping concentration, which provided a facile tool to manipulate the lattice structure of octahedra dimers (hexagonal) or monomers (cubic). The mechanism of phase transition was theoretically explained through both phonon spectrum and lattice formation energy. This work opened many avenues to advanced applications such as information storage, X-ray imaging and anti-counterfeiting.
期刊介绍:
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.