Journal
CARBON
Volume 130, Issue -, Pages 384-389Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2018.01.039
Keywords
Diamond; Phosphorescence; High temperature and high pressure
Funding
- Nature Foundation for Distinguished Young Scholars of China [61425021]
- National Natural Science Foundation of China [51602288, 11374296, 51272238]
- China Postdoctoral Science Foundation [2015M582192, 2016T90671, 2017M622360]
- Postdoctoral Research Sponsorship in Henan Province
- Zhengzhou University [1512317006]
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Synthetic diamonds have inspired much interest for their unique photophysical properties and versatile potential applications, but their phosphorescent phenomenon and mechanism have been paid much less attention. Here, phosphorescent diamonds with a lifetime of 5.4 s were synthesized by high-pressure and high-temperature method, and the diamonds exhibit an emission band at around 468 nm under the excitation wavelength of 230 nm. The quantum yield of the phosphorescent diamonds is about 4.7% at ambient temperature and atmosphere, which is the first report on the quantum yield of diamonds. The unique phosphorescence emission can be attributed to the radiative recombination from iron related donors and boron related acceptors. (c) 2018 Elsevier Ltd. All rights reserved.
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