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Fluorescence, phosphorescence, thermoluminescence and charge transfer in synthetic diamond
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Zhao, Jiahui (2022) Fluorescence, phosphorescence, thermoluminescence and charge transfer in synthetic diamond. PhD thesis, University of Warwick.
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WRAP_Theses_Zhao_2022.pdf - Submitted Version - Requires a PDF viewer. Download (87Mb) | Preview |
Official URL: http://webcat.warwick.ac.uk/record=b3856847
Abstract
This thesis reports the investigation of the physics of long-lived phosphorescence in lab-grown High-Pressure High-Temperature (HPHT) diamond. To understand of luminescence and related charge transfer processes, a combination of techniques have been employed including cathodoluminescence (CL), photoluminescence (PL), the phosphorescence lifetime and spectroscopic studies, thermoluminescence (TL); as well as temperature-variable time-resolved Fourier Transform Infrared (FTIR) absorption spectroscopy and Electron Paramagnetic Resonance (EPR) measurements used to monitor the dynamics in concentrations of neutral boron acceptors and deep nitrogen donors during phosphorescence emission.
The “blue-green" phosphorescence spectrum, lifetime, and intensity in different growth sectors have been studied. Variations between growth sectors is due to differences in the concentration of substitutional boron (BS) and substitutional nitrogen (NS) defects. Substitutional boron can exist in neutral and negative charge states. B0 S is a relatively shallow acceptor. In this work it is conclusively shown that substitutional nitrogen can exist in positive, neutral and importantly negative charge states. Time-resolved EPR studies of the recovery of N0 S after optical excitation have enabled identification of N
Item Type: | Thesis (PhD) | ||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TP Chemical technology |
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Library of Congress Subject Headings (LCSH): | Diamonds, Artificial, Diamonds, Artificial -- Spectra, Phosphorescence, Fluorescence, Thermoluminescence, Charge transfer | ||||
Official Date: | April 2022 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | Department of Physics | ||||
Thesis Type: | PhD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Newton, Mark E. | ||||
Format of File: | |||||
Extent: | xxiii, 246, 33 pages : colour illustrations | ||||
Language: | eng |
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