Zhang Haozhi, Guyot-Sionnest Philippe
The James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States.
J Phys Chem Lett. 2020 Aug 20;11(16):6860-6866. doi: 10.1021/acs.jpclett.0c01550. Epub 2020 Aug 10.
Spherical and tetrahedral HgTe colloidal quantum dots (CQDs) are synthesized, and their doping is tuned electrochemically. Compared to spherical dots of a similar volume, the tetrahedral CQDs show a decrease in confinement energy as well as a sharper band edge absorption. The intraband spectra of the tetrahedral CQDs also display a smaller splitting from spin-orbit coupling. The shape-controlled synthesis with an improved size distribution and sharper optical features could find applications in optoelectronic devices.
合成了球形和四面体HgTe胶体量子点（CQD），并通过电化学方法调节其掺杂。与体积相似的球形量子点相比，四面体CQD的限制能量降低，带边吸收更尖锐。四面体CQD的带内光谱也显示出自旋轨道耦合引起的分裂更小。这种具有改进的尺寸分布和更尖锐光学特性的形状控制合成方法可能在光电器件中得到应用。
