The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states

Autor:	M. L. Crespillo, J. T. Graham, F. Agulló-López, Y. Zhang, W. J. Weber
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	SrTiO3 electronic excitation density self-trapped excitons oxygen vacancies ionoluminescence Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 7, Iss 7, Pp 298-303 (2019)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2019.1604444
Popis:	The origin of the blue emission in SrTiO3 has been investigated as a function of irradiation fluence, electronic excitation density, and temperature using a range of ion energies and masses. The emission clearly does not show correlation with the concentration of vacancies generated by irradiation but is greatly enhanced under heavy-ion irradiation. The intensity ratio of the 2.8 and 2.5 eV bands is independent of fluence at all temperatures, but it increases with excitation rate. The 2.8 eV emission is proposed to correspond to a transition from conduction band states to the ground state level of the self-trapped exciton center.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/aaa272dea44142d5bb5cf88b210190e0 Zobrazit plný text záznamu View record in DOAJ