高温高压氮掺杂金刚石的光致发光研究  

Photoluminescence Studies on Nitrogen Doped Diamond Synthesized by High Temperature and High Pressure Method

作　　者：王凯悦[1] 张文晋 张宇飞 丁森川 常森 王慧军[1] WANG Kai-yue;ZHANG Wen-jin;ZHANG Yu-fei;DING Sen-chuan;CHANG Sen;WANG Hui-jun(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,太原030024

出　　处：《人工晶体学报》2018年第11期2334-2337,共4页Journal of Synthetic Crystals

基　　金：国家自然科学基金青年科学基金项目(61705176);中国博士后科学基金面上资助一等资助(2017M620449);中国博士后科学基金特别资助(2018T111056);陕西省博士后科研项目配套资助;山西省研究生教育改革研究课题(2018JG71);山西省研究生教育创新项目(2018SY086)

摘　　要：本文利用激光共聚焦显微拉曼光谱仪表征了高温高压法合成的氮掺杂金刚石,并分析了该晶体的光致发光特性。结果表明,金刚石晶体内部含氮量比晶体表面高,且由于氮原子尺寸较大,使得晶体内部应力较高,晶化程度弱化;另外,氮掺杂金刚石的光致发光主要以氮-空位(NV)复合缺陷为主;氮含量高的区域,NV缺陷发光增强,且NV-/NV0强度比也增强。这是因为氮作为施主原子,有利于负电荷缺陷即NV-中心的形成;同时氮含量升高,也会使得费米能级向NV-中心的基态靠近,这也造成了NV-/NV0强度比随氮含量增加而增强。The nitrogen doped diamond synthesized by high temperature and high pressure method was characterized by micro-Raman spectrometer.It was found that diamond had more nitrogen inside the crystal than the surface,and the larger size of nitrogen atom resulted in the higher stress and weaker crystallization inside the crystal.The photoluminescence of nitrogen-doped diamond was mainly caused by the nitrogen-vacancy(NV)complex.With the increase of nitrogen content,the NV luminescence enhanced together with the increase of intensity ratio of NV^-/NV^0.The reason was that the nitrogen,as the donor atom,favored to the formation of the negative charge defect;besides,the more nitrogen made Fermi level move towards the ground state of NV-center,which also caused the increase of the increase of intensity ratio of NV^-/NV^0.

关 键 词：金刚石 高温高压 光致发光 氮-空位 

分 类 号：V254.2[一般工业技术—材料科学与工程]