具有半导体和导电功能特性的金刚石大单晶在高功率电子器件和高技术领域具有重要应用。大尺寸优质掺杂功能金刚石单晶的制备是金刚石研究领域亟待突破的关键科学问题。硼氢共掺杂是制备具有高电导率半导体金刚石大单晶的有效途径，高温高压合成方法是实现金刚石单晶中硼氢共掺杂的关键技术。本项目将采用大腔体压机的高温高压合成技术，通过优选硼氢共掺杂的触媒溶剂和硼氢掺杂剂、调节硼和氢的掺杂比例、优化合成工艺来制备厘米级优质硼氢共掺杂功能金刚石大单晶。借助同步辐射形貌分析技术、二次离子质谱技术、紫外荧光光谱、显微拉曼和红外光谱、核磁共振、变温霍尔测试技术等先进的测试手段，深入研究硼氢共掺杂金刚石大单晶的晶体质量以及硼和氢在金刚石单晶中的含量、分布和存在形式，揭示硼氢掺杂量和掺杂比例对金刚石电学性质的影响机制和调制规律，最终制备出厘米级功能器件用优质高电导率硼氢共掺杂功能金刚石单晶。

Diamond large single crystals with semiconductor and electrical function properties have important applications in the field of high power electronic devices and various high-tech devices. The synthesis of doped functional diamond large single crystals has been internationally a key scientific question to be solved in the field of diamond research. The B-H co-doping technique is an effective way to synthesize the semiconductor diamond single crystal with high conductivity. High pressure and high temperature (HPHT) synthesis method is a key technology to realize B-H co-doping in diamond. By selecting the appropriate catalysts and B/H additives, adjusting the proportions of various additives and optimizing the synthesis process, this project will synthesize B-H co-doped functional diamond large single crystals under HPHT conditions using large cell high pressure apparatus. To study the content and existence forms of boron and hydrogen in diamond, especially the influencing mechanism and rule of B, H contents and proportions on the functional properties of diamond, the synthetic B-H co-doped diamonds will be characterized by Synchrotron technique, Secondary ion mass spectrometer (SIMS), UV-PL, Micro Raman spectra and Fourier transform infrared (FTIR), NMR, Variable Temperature Hall System etc. Ultimately, the centimeter-scale high quality B-H co-doped functional diamond large single crystals will be synthesized.