Study on the synergistic mechanism of N-H-S-O co-doping in diamonds

Nitrogen impurity remains a crucial focus in diamond impurity research. To address difficulties associated with excessive nitrogen impurities during the synthesis of high -quality diamonds under high-pressure and hightemperature conditions and to increase the proportion of aggregated nitrogen impurities in diamonds, we explored the multi -element growth environment of natural diamonds. In this study, we used N-H-S-O multicomponent co -doping to increase the proportion of aggregated nitrogen impurities in diamond. Through Fourier -transform infrared spectroscopy characterization, we successfully used the synergistic mechanism of N-H-S-O co -doping to achieve a 47.9% proportion of aggregated nitrogen impurities in diamond in a single synthesis and successfully synthesized the type IaA + Ib diamond. Raman tests revealed a lower residual stress in the high -quality large single -crystal diamond synthesized. Moreover, we comprehensively analyzed the mechanism of N-H-S-O co -doping to increase the proportion of nitrogen impurities in diamond aggregates and proposed an optimal ratio principle based on the experimental results. This study presents a method for synthesizing diamonds with a high proportion of aggregated nitrogen impurities and provides valuable guidance for elucidating the origin of natural diamonds and synthesizing multi -doped functional diamonds.