Open AccessСинтез и люминесцентные свойства титанатов висмута Bi-=SUB=-1.6-=/SUB=-Ho-=SUB=-x-=/SUB=-Ti-=SUB=-2-=/SUB=-O-=SUB=-7-delta-=/SUB=- и Bi-=SUB=-1.6-=/SUB=-Mg-=SUB=-0.1-=/SUB=-Ho-=SUB=-x-=/SUB=-Ti-=SUB=-2-=/SUB=-O-=SUB=-7-delta-=/SUB=-
Author(s) -
А. В. Ищенко,
М. С. Королева,
Maxim I. Vlasov,
Е. И. Истомина,
И. В. Пийр
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.05.47602.08f
Subject(s) - luminescence , impurity , analytical chemistry (journal) , crystallography , materials science , atomic physics , physics , chemistry , optoelectronics , chromatography , quantum mechanics
Pyrochlores Bi_1.6Ho_ x Ti_2O_7 – δ and Bi_1.6Mg_0.1Ho _ x Ti_2O_7 – δ, where x = 0, 0.01, 0.05, and 0.1, and Bi_1.5Ho_ x Ti_2O_7 – δ, where x = 0.25 and 0.5, have been synthesized and their structural, optical, and luminescence properties have been studied. As a result of analyzing the data obtained experimentally and the available theoretical data, it is shown that the intrinsic luminescence of the samples is due to the O2 p ↔ Bi6 p and Bi6 s ↔ Bi6 p electron transitions and the impurity luminescence is due to the f – f transitions in Ho^3+ and the O2 p → Ho^3+ charge transfer.