Bright luminescence of diamonds with Ge-V centers
| Autor: | M. N. Popova, Kirill N. Boldyrev, B. N. Mavrin, Peter S. Sherin |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Chemistry
Biophysics Ab initio Quantum yield Diamond 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics symbols.namesake Microcrystalline Stokes shift 0103 physical sciences Nano symbols engineering Atomic physics 010306 general physics 0210 nano-technology Luminescence Line (formation) |
| Zdroj: | Journal of Luminescence. 193:119-124 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2017.07.031 |
| Popis: | We report on the quantum yield ( η ) and decay time (τ) measurements at room temperature for the bright red-orange (602 nm) luminescence from new germanium-vacancy (Ge-V) centers in nano- and microcrystalline diamonds synthesized at high pressure and high temperature. The values η = 3 ± 1% and τ = 6.2±0.2 ns were found. The Stokes shift measured as the energy difference between the maxima of the luminescence and luminescence excitation spectra is negligible. The relative intensity of the zero-phonon line constitutes up to 70% of the total intensity of the luminescence. Results of our ab initio DFT calculations for the ground-state electronic and vibrational structure of (Ge-V) - in diamond are presented and discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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