Mechanoluminescence in BaSi2O2N2:Eu |
| |
Authors: | Jonas Botterman Koen Van den Eeckhout Ives De Baere Dirk Poelman Philippe F Smet |
| |
Affiliation: | 1. LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, 9000 Gent, Belgium;2. Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Belgium;3. Department of Materials Science and Engineering, Ghent University, Technologiepark Zwijnaarde 903, 9052 Zwijnaarde, Belgium |
| |
Abstract: | Mechanoluminescence (ML), a general term for the phenomenon in which light emission occurs during any mechanical action on a solid, can be divided roughly into two classes: destructive ML and non-destructive ML. For practical use in high-end applications (e.g. pressure sensors), materials with non-destructive ML properties are preferred. This paper reports on the strong non-destructive ML in BaSi2O2N2:Eu. When irradiated in advance with ultraviolet or blue light, this phosphor shows intense blue-green light emission upon mechanical stimulation such as friction or pressure. The ML has an emission band peaking at 498 nm, which is ~4 nm red-shifted compared to the steady-state photoluminescence. The origin of the ML is discussed and related to the persistent luminescence of BaSi2O2N2:Eu. The same traps are responsible for both phenomena. Based on the occurrence of ML in this phosphor, we were able to show that the predominant crystallographic structure of BaSi2O2N2:Eu belongs to space group Cmc21. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|