Optik Pub Date : 2021-03-01 , DOI: 10.1016/j.ijleo.2021.166631 H. Khanbashy
Highly near infrared luminescent Pb1-xYbxS QDs were prepared using tert-dodecylmercaptan assisted microwave technique. The Pb1-xYbxS 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 Pb1-xYbxS 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 Pb1-xYbxS 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 Pb1-xYbxS 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.
中文翻译:
使用叔十二烷基硫醇辅助微波技术开发用于量子光学和光学激光放大器的近红外发光Pb 1-x Yb x S QD
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。