Quantitative Analysis of Nitrogen Defect N4 in Diamond with Photoluminescence Excited in the 170–240 nm Region

Abstract

Upon excitation at 170-240 nm, diamonds emit strong luminescence in wavelength range of 300-700 nm. The spectral features observed in the photoluminescence excitation (PLE) spectra show two vibrational progressions, A and B, related to nitrogen defects N2 and N4, respectively. We used PLE spectra excited in region 170-240 nm to identify the type of diamond and demonstrate quantitative analysis of the B center as a N4 nitrogen defect in diamonds; the least detectable concentration of the N4 nitrogen defect is about 13 ppb, and the sensitivity of PLE is about 30 times than that practicable with infrared absorption spectra.

Analysis of Nickel Defect in Diamond with Photoluminescence upon Excitation near 200 nm

“…This estimate yields an idea as a comparison of these two methods; to achieve more quantitative information, we can develop the detection information from our previous work. 17 Similar to this work, the UV-PL technique upon excitation at 170−240 nm was applied to analyze quantitatively the B center as a N4 nitrogen defect in diamonds previously. In our previous work, we obtained that the least detectable concentration of the N4 nitrogen defect was about 13 ppb; in which, the sensitivity of the UV-PL technique was about 30 times than that practicable with infrared absorption spectra.…”

“…The detectivity of the nickel defect in diamond based on the UV-PL technique is about 70 times that with the infrared method. This estimate yields an idea as a comparison of these two methods; to achieve more quantitative information, we can develop the detection information from our previous work . Similar to this work, the UV-PL technique upon excitation at 170–240 nm was applied to analyze quantitatively the B center as a N4 nitrogen defect in diamonds previously.…”

“…Photoluminescence is a sensitive and powerful technique to characterize optically the impurities, defects and absorption edges of diamonds. In previous works, we applied the PL technique with excitation from a synchrotron light source at wavelengths smaller than 250 nm to identify sensitively the nitrogen defects in various diamonds. − In the present work, we analyzed the nickel defect in diamond by detecting the PL upon excitation at 200–220 nm. On the basis of this UV-PL technique, the detectivity of nickel defect in diamonds has achieved much enhancement, 1000 times as great as before.…”

Identification of diborane(4) with bridging B–H–B bonds

“…S1 of the ESI; † this spectrum was recorded on beamline BL03. 29 , 30 The most intense feature of this ultraviolet spectrum has maximum absorption at 122.6 nm; the irradiation of solid B 2 H 6 /Ne = 1/1000 at this wavelength produced many new lines in the infrared absorption spectrum, listed in Table S1 in the ESI. †…”

Nitrogen-Vacancy Centers in Diamond for High-Performance Detection of Vacuum Ultraviolet, Extreme Ultraviolet, and X-rays

“…A few features are noteworthy. First, the PLE edge in the VUV region coincided with the absorption edge of pure diamond at 226 nm (inset in Figure ), − proving that the PL signals are directly associated with the interband absorption of the diamond. Second, the PLE signals began near 5.47 eV (226 nm) and rose substantially at about 7.0 eV (177 nm), a result of direct interband absorption.…”