Highly near infrared luminescent Pb_1-xYb_xS QDs were prepared using tert-dodecylmercaptan assisted microwave technique. The Pb_1-xYb_xS QDs showed sizes range from 3.4 to 9.8 nm with narrow distribution. The quantum dot size to excitonic Bohr radius ratio for the Pb_1-xYb_xS QDs was found in the range 0.05 to 0.09, implying the strong degree of confinement. The optical absorption spectra disclosed the decrease of the Pb_1-xYb_xS bandgap from 1.35 eV to 1.23 eV. The PL-spectra proved that the Yb-atoms enhanced the PL-intensity by 9 times and the quantum yield by 76 %. The Pb_1-xYb_xS QDs tuned the emitted light from visible red to near infrared spectrum that paving them to be employed in quantum optics and optical laser amplifiers.

使用叔十二烷基硫醇辅助微波技术制备了高度近红外发光的Pb _1-x Yb _x S QD。Pb _1-x Yb _x S QD的尺寸范围为3.4至9.8 nm，分布较窄。发现Pb _1-x Yb _x S QD的量子点尺寸与激子玻尔半径之比在0.05到0.09的范围内，这意味着强烈的约束度。光吸收光谱揭示了Pb _1-x Yb _x S带隙从1.35 eV降低到1.23 eV。PL光谱证明Yb原子将PL强度提高了9倍，量子产率提高了76％。Pb _1-x Yb _xS个量子点将发射的光从可见的红色调到近红外光谱，从而将其铺在量子光学和光学激光放大器中。