DOI: 10.17035/d.2023.0281573780
title: The Blue delayed luminescence emission seen in a CVD synthetic as grown diamond: data

description: The data investigate the temperature-dependent properties of an untreated nitrogen-doped CVD diamond from Element Six with 0.13 ppm nitrogen concentration (determined using UV absorption technique). This datasheet hold the data for 1) photoluminescence measurements taken concurrently with the initial excitation “prompt” photoluminescence; 2) temperature-dependent photoluminescent measurements taken 90 μs after the initial excitation, “delayed” photoluminescence; and delayed time-resolved photoluminescence measurements at two specific wavelengths (3) 455 and (4) 575 nm). The prompt and delayed photoluminescence spectra were measured as a function of temperature (77-350 K) as a result of excitation from, a Hamamatsu Photonics L7685 xenon flash lamp, which was spectrally filtered by a bespoke band-pass filter (Laser Components) to a 190-227 nm output with a temporal pulse width of 2.9 μs at full-width half maximum (FWHM). A Horiba iHR- 320 spectrometer with a 300 g/mm grating was used with an Andor iStar DH320T-18U-E3 intensified charged-coupled device (iCCD) camera to record the spectral data. A pulse generator was used to provide two externally generated transistor-transistor-logic (TTL) signals for the synchronization of the camera and flash lamp. An offset of 8 μs was applied to the camera to overcome the electrical signal latency recorded between the camera and the flash lamp. To record the prompt luminescence, the iCCD delay was set to zero to allow the emission to be detected during the firing of the lamp pulse. A delay of 100 μs was set before the emission signal of the delayed luminescence was recorded. 1) The data recorded during the prompt luminescence can be found under the excel tab - Prompt_RAW luminescecne data and is formatted with each column displaying the data recorded at a particular temperature from 77 - 350 K and each row displaying the data collected at a particular wavelength from 400 - 750 nm. 2) The data recorded during the delayed luminescence can be found under the excel tab - Delayed_RAW luminescence data and is formatted with each column displaying the data recorded at a particular temperature from 77 - 350 K and each row displaying the data collected at a particular wavelength from 400 - 750 nm. Time-resolved delayed luminescence measurements of the sample were taken using a thermally cooled Horiba Jobin Yvon IBH TBX-04 photomultiplier via a Horiba iHR-320 spectrometer. The detector and flash lamp were triggered simultaneously, with channels recording both the prompt and delayed luminescence in each time sweep of the multichannel analyzer. The time spacing of the channels was selected to suit the decay time being measured. After the data were accumulated, the first 330 channels were removed by the Horiba Fluorescence Decay Analysis Software (DAS6). 3) The time- resolved data recorded during the delayed luminescence timescale at 455 nm can be found under the excel tab - Delayed_RAW_455 nm decay trace. The data is formatted with each column displaying the data collected by temperature between (77 and 350 K) while each row holds the amount of counts recorded at that temperature per channel. Each channel can be calibrated into time (ns) by multiplying the channel by 341334. 4) The time- resolved data recorded during the delayed luminescence timescale at 455 nm can be found under the excel tab - Delayed RAW 575 nm decay trace . The data is formatted with each column displaying the data collected by temperature between (77 and 350 K) while each row holds the amount of counts recorded at that temperature per channel. Each channel can be calibrated into time (ns) by multiplying the channel by 341334. The data is stored in an excel Workbook (*.xlsx) and can be opened through ‘excel’ or ‘notepad’.