文献类型：期刊文献

英文题名：Defect induced photoluminescence and triboluminescence in layered CaLaAl3O7

作者：Li, Yezhou[1,2];Koskin, Igor P.[3,4];Ma, Zhidong[1];Benassi, Enrico[1,3,5];Wang, Zhaofeng[1]

第一作者：Li, Yezhou;李元贞

通信作者：Benassi, E[1];Wang, ZF[1];Benassi, E[2];Benassi, E[3]

机构：[1]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China;[2]Gansu Univ Chinese Med, Sch Informat Sci & Engn, Lanzhou 730000, Peoples R China;[3]Novosibirsk State Univ, Fac Nat Sci, Novosbirsk 630090, Russia;[4]NN Vorozhtsov Novosibirsk Inst Organ Chem, Novosibirsk 630090, Russia;[5]Chinese Acad Sci, Lanzhou Inst Chem Phys, Publ Tech Serv Ctr, Lanzhou 730000, Peoples R China

第一机构：Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

通信机构：[1]corresponding author), Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China;[2]corresponding author), Novosibirsk State Univ, Fac Nat Sci, Novosbirsk 630090, Russia;[3]corresponding author), Chinese Acad Sci, Lanzhou Inst Chem Phys, Publ Tech Serv Ctr, Lanzhou 730000, Peoples R China.

年份：2020

卷号：49

期号：13

起止页码：3942

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20201508396962);Scopus(收录号：2-s2.0-85082779560);WOS:【SCI-EXPANDED(收录号:WOS:000527538300029)】；

基金：This work was supported by the CAS Pioneer Hundred Talents Program and the grants from Gansu University of Chinese Medicine (2305137502 and ZQ2015-3). The computational part of this work was carried out, thanks to the equipment kindly provided by the Siberian Supercomputer Centre (SSCC) ICMMG SB RAS, Akademgorodok, Russian Federation. The technical personnel are also gratefully thanked.

语种：英文

外文关键词：Aluminum compounds - Crystal structure - Lanthanum compounds - Oxygen - Photoluminescence - Triboluminescence

摘要：In this work, a layered melilite structure, CaLaAl3O7, was synthesized and observed to have obvious luminescence behaviors under the stimuli of ultraviolet light and rubbing, which were called photoluminescence and triboluminescence, respectively. Considering the wide bandgap of CaLaAl3O7 and its specific crystal structure, the observed luminescence should be attributed to intrinsic defects. Both the photoluminescence and triboluminescence of CaLaAl3O7 show a strong dependence on the synthesis atmosphere, suggesting that they should be related to the oxygen vacancy. It is attractive to find that the triboluminescence of CaLaAl3O7 shows a distinct spectral characteristic compared to its photoluminescence. Further computational results suggest that the applied mechanical stimuli on the CaLaAl3O7 cell could promote the formation of the vacancies of oxygen and calcium, responsible for the spectral differences.