Phase Transformation of a K2GeF6 Polymorph for Phosphors Driven by a Simple Precipitation–Dissolution Equilibrium and Ion Exchange; Inorganic Chemistry; Vol. 59, iss. 12

Phase Transformation of a K2GeF6 Polymorph for Phosphors Driven by a Simple Precipitation–Dissolution Equilibrium and Ion Exchange; Inorganic Chemistry; Vol. 59, iss. 12

Bibliografske podrobnosti
Parent link:Inorganic Chemistry
Vol. 59, iss. 12.— 2020.— [P. 8298–8307]
Corporate Authors: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения, Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий
Drugi avtorji: Lang Tianchun, Fang Shuangqiang, Khan (Han) Tao, Wang Mingguang, Yang Donglin, Wang Jun, Cao Shixiu, Peng Lingling, Bitao Liu, Cai Mingsheng, Zhong Yang, Yakovlev A. N. Aleksey Nikolaevich, Korepanov V. I. Vladimir Ivanovich
Izvleček:Title screen
Tuning crystal phase transformations is very important for obtaining polymorphs for phosphors with the ideal optical properties and stability. Mn4+-doped K2GeF6 (KGF) is a typical polymorphic phosphor, but the thermodynamic and kinetic mechanism of its phase transformation is still unclear. Herein, the phase transformation of polymorphs varying from P63mc KGF and trigonal KGF to P63mc Si4+-doped KGF is realized by introducing the synergistic action of an HF solution and Si4+ ions. The full structural refinements of KGF polymorphs at room temperature and the electronic band structure calculations were performed. The results show that the Si4+-doped hexagonal KGF polymorph with good photoluminescence properties is the most stable phase according to the calculated total energy landscape and relative formation energy. The morphologic changes were monitored in situ to clearly understand the rapid phase transformation mechanism, which proves that the phase transformation is driven by a simple precipitation–dissolution equilibrium and ionic exchange.
Режим доступа: по договору с организацией-держателем ресурса
Jezik:angleščina
Izdano: 2020
Teme:
электронный ресурс
труды учёных ТПУ
фазовые превращения
полиморфы
люминофоры
равновесие
осаждение
растворение
ионный обмен
Online dostop:https://doi.org/10.1021/acs.inorgchem.0c00701
Format: Elektronski Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662528

Podobne knjige/članki

Podobne knjige/članki