It is reported in this paper that pressure can promote strong photoluminescence (PL) in MgO. The PL measurements of MgO indicate that it has no obvious luminescence at pressures lower than 13 GPa. PL starts to appear upon further compression and reaches a maximum intensity at about 35 GPa. The center of the emission band shows a red shift at lower pressures and turns to a blue shift as pressure exceeds 25 GPa. The PL is preserved upon complete decompression. The defects and micro-strain due to the plastic deformation of MgO are likely responsible for the origin of the luminescence.
|Journal||Journal of Physics Condensed Matter|
|Publication status||Published - 2018 Apr 19|
Bibliographical noteFunding Information:
The authors acknowledge the support of the National Science Associated Funding (Grant No. U1530402) and the ‘Science Challenging Pro-gram (Grant No. JCKY2016212A501)’. In situ synchrotron x-ray diffraction experiments were performed at the BL15U1 beamline of Shanghai Synchrotron Radiation Facility (SSRF) and beamline 13-BM-C of Advanced Photon Source (APS) in Argonne National Laboratory. The authors would like to thank SSRF and APS for use of the synchrotron radiation facilities.
© 2018 IOP Publishing Ltd.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics