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Defect induced photoluminescence and triboluminescence in layered CaLaAl3O7 Full article

Journal Dalton Transactions
ISSN: 1477-9226 , E-ISSN: 1477-9234
Output data Year: 2020, Volume: 49, Number: 13, Pages: 3942-3945 Pages count : 4 DOI: 10.1039/c9dt03849c
Authors Li Yezhou 1,2 , Koskin Igor P. 3,4 , Ma Zhidong 1 , Benassi Enrico 1,3,5 , Wang Zhaofeng 1
Affiliations
1 (Данные Web of science) Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
2 (Данные Web of science) Gansu Univ Chinese Med, Sch Informat Sci & Engn, Lanzhou 730000, Peoples R China
3 (Данные Web of science) Novosibirsk State Univ, Fac Nat Sci, Novosbirsk 630090, Russia
4 (Данные Web of science) NN Vorozhtsov Novosibirsk Inst Organ Chem, Novosibirsk 630090, Russia
5 (Данные Web of science) Chinese Acad Sci, Lanzhou Inst Chem Phys, Publ Tech Serv Ctr, Lanzhou 730000, Peoples R China

Abstract: 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.
Cite: Li Y. , Koskin I.P. , Ma Z. , Benassi E. , Wang Z.
Defect induced photoluminescence and triboluminescence in layered CaLaAl3O7
Dalton Transactions. 2020. V.49. N13. P.3942-3945. DOI: 10.1039/c9dt03849c WOS Scopus РИНЦ
Identifiers:
Web of science WOS:000527538300029
Scopus 2-s2.0-85082779560
Elibrary 43259167
OpenAlex W2983534457
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