高温高压合成金刚石晶体中铕的X射线激发光学发光

X-ray Excited Optical Luminescence of Eu in Diamond Crystals Synthesized at High Pressure High Temperature.

作者信息

Lebedev Vasily T, Shakhov Fedor M, Vul Alexandr Ya, Zakharov Arcady A, Zinoviev Vladimir G, Orlova Vera A, Fomin Eduard V

机构信息

B.P.Konstantinov Petersburg Nuclear Physics Institute of NRC Kurchatov Institute, 188300 Gatchina, Russia.

Ioffe Institute, Polytekhnicheskaya Street, 26, 194021 St. Petersburg, Russia.

出版信息

Materials (Basel). 2023 Jan 15;16(2):830. doi: 10.3390/ma16020830.

DOI:10.3390/ma16020830

PMID:36676567

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9862300/

Abstract

Powder diamonds with integrated europium atoms were synthesized at high pressure (7.7 GPa) and temperature (1800 °C) from a mixture of pentaerythritol with pyrolyzate of diphthalocyanine (CHNEu) being a special precursor. In diamonds prepared by X-ray fluorescence spectroscopy, we have found a concentration of Eu atoms of 51 ± 5 ppm that is by two orders of magnitude greater than that in natural and synthetic diamonds. X-ray diffraction, SEM, X-ray exited optical luminescence, and Raman and IR spectroscopy have confirmed the formation of high-quality diamond monocrystals containing Eu and a substantial amount of nitrogen (~500 ppm). Numerical simulation has allowed us to determine the energy cost of 5.8 eV needed for the incorporation of a single Eu atom with adjacent vacancy into growing diamond crystal (528 carbons).

摘要

以季戊四醇与二酞菁热解产物（CHNEu）的混合物为特殊前驱体，在高压（7.7 GPa）和高温（1800 °C）下合成了含有整合铕原子的粉末状钻石。通过X射线荧光光谱法在制备的钻石中，我们发现铕原子浓度为51±5 ppm，这比天然钻石和合成钻石中的浓度高两个数量级。X射线衍射、扫描电子显微镜、X射线激发光致发光以及拉曼光谱和红外光谱证实了含有铕和大量氮（约500 ppm）的高质量钻石单晶的形成。数值模拟使我们能够确定将单个铕原子与相邻空位掺入生长中的钻石晶体（528个碳原子）所需的能量成本为5.8 eV。