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UV-induced defect formation in cubic ZrO2. Optical demonstration of Y, Yb and Er dopants interacting with photocarriers

Authors :
V. K. Ryabchuk
Ruslan Khabibrakhmanov
Anna V. Shurukhina
Aida V. Rudakova
Galina Kataeva
Dmitrii Barinov
Nick Serpone
Alexei V. Emeline
Source :
Chemical Physics Letters. 742:137136
Publication Year :
2020
Publisher :
Elsevier BV, 2020.

Abstract

The UV-induced photocoloration of cubic zirconia (c-ZrO2) stabilized by Y2O3, Yb2O3 and Er2O3 and treated as a wide bandgap metal oxide (MO2) heavily doped with M3+ ions has been examined by diffuse reflectance spectroscopy. Using the narrow f-f absorption bands of optically labeled Yb3+ and Er3+ as the M3+ dopants, the interaction of these dopant ions with photocarriers is demonstrated spectroscopically against a non-resolved broadband background. The latter occurs as a result of an offset of specific f-f absorption bands following conversion of M3+ ions into optically silent M2+ ions by the trapping of photoelectrons or by a change of the local symmetry of the M3+ surroundings caused by the UV-induced formation of color centers.

Details

ISSN :
00092614
Volume :
742
Database :
OpenAIRE
Journal :
Chemical Physics Letters
Accession number :
edsair.doi...........dd76d60ef42c9a34df1c02b40e09c770
Full Text :
https://doi.org/10.1016/j.cplett.2020.137136