Stability and electronic properties of O vacancies and Ce4+ in Lu2SiO5 tuned by C doping
Source abstract
Abstract
Abstract Lu2SiO5:Ce is a well-known scintillator with high density, high light yield, and short decay time. Oxygen vacancies and Ce4+ have been demonstrated to degrade the scintillating properties. We investigate the effect of C doping on the stability and electronic properties of the oxygen vacancies and the Ce4+ in Lu2SiO5. Stability of the C atom at the O site and the interstitial site depends on the O chemical potential. The C defects have strong interaction with nearby oxygen vacancies and Ce4+. Importantly, C doping can tune the amount of the oxygen vacancies and Ce4+ in Lu2SiO5. C doping introduces defect bands in the band gap of Lu2SiO5 with the energies ranging from 0.13 eV to 2.1 eV above the valence band maximum.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Radiation Detection and Scintillator Technologies · Nuclear Physics and Applications · Luminescence Properties of Advanced Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Lu2SiO5 by single-crystal X-ray and neutron diffraction10.1107/S0108270101005352 ↗
2. Cerium-doped lutetium oxyorthosilicate: A fast, efficient new scintillator10.1109/23.159655 ↗
3. Experimental efforts and results in finding new heavy scintillators
4. EPR study of Ce3+ ions in lutetium silicate scintillators Lu2Si2O7 and Lu2SiO510.1016/j.jpcs.2005.10.175 ↗
5. Luminescence characteristics of Lu2SiO5:Ce3+ (LSO:Ce) ceramic scintillators under VUV-UV excitation10.1016/j.nima.2015.10.037 ↗
6. Optical properties and electronic structure of Lu2SiO5 crystals doped with cerium ions: thermally-activated energy transfer from host to activator10.1016/j.jlumin.2014.10.010 ↗
7. Air atmosphere annealing effects on LSO:Ce crystal10.1109/TNS.2009.2036351 ↗
8. Afterglow and thermoluminescence properties of Lu2SiO5:Ce scintillation crystals10.1088/0953-8984/6/22/016 ↗
9. Effects of air annealing on luminescent properties of cerium-doped lutetium oxyorthosilicate scintillation ceramics10.1109/TNS.2015.2511066 ↗
10. The mechanism of enhanced luminescence in ion-codoped Lu2SiO5:Ce3+ phosphors10.1016/j.jlumin.2015.01.058 ↗
11. Evidence and consequences of Ce4+ in LYSO:Ce,Ca and LYSO:Ce,Mg single crystals for medical imaging applications10.1109/TNS.2013.2269700 ↗
12. Effect of Li doping on the O vacancies in Lu2SiO5:Ce phosphors10.1016/j.matlet.2018.06.051 ↗
13. Enhanced luminescence induced by change of cerium oxidation states in Li-codoped Lu2SiO5:Ce3+ phosphors10.1016/j.matlet.2013.03.060 ↗
14. Highly sensitive thermoluminescent anion-defect alpha-Al2O3:C single crystal detectors10.1093/rpd/33.1-4.119 ↗
15. Influence of carbon on the thermoluminescence and optically stimulated luminescence of α-Al2O3:C crystals10.1063/1.3050344 ↗
16. Stability and electronic properties of carbon in α-Al2O310.1016/j.jpcs.2013.11.005 ↗
17. From ultrasoft pseudopotentials to the projector augmented-wave method10.1103/PhysRevB.59.1758 ↗
18. Generalized gradient approximation made simple10.1103/PhysRevLett.77.3865 ↗
19. First-principles calculations for defects and impurities: applications to III-nitrides10.1063/1.1682673 ↗
20. Monte Carlo study on the imaging performance of powder Lu2SiO5:Ce phosphor screens under X-ray excitation: comparison with Gd2O2S:Tb screens10.1118/1.2724065 ↗
21. Efficient photochemical water splitting by a chemically modified n-TiO210.1126/science.1075035 ↗
22. Degradation of methylene blue on carbonate species-doped TiO2 photocatalysts under visible light10.1246/cl.2004.750 ↗