Semiconductor colloidal quantum dots (CQDs) offer strong benefits for the near infra-red quantum dot-based light emitting diodes (NIR QLEDs) and lasers owing to the widely tunable wavelength of emitted light, high quantum efficiency and full integration with low-cost solution processing technique. Several approaches have been proposed to address these shortcomings including tailoring the interdot distance by organic ligands, using core-shell structure and embedding PbS QDs in perovskite matrix. Here, we propose an alternative method for improving the performance of PbS-based NIR QLEDs PbS QDs with PL peak at 1.3 µm were synthesized through cationic exchange approach from zinc sulfide (ZnS) nanorods. Inserting an ultra-thin Al2O3 ESL strongly enhanced the device performance.
Mikita Marus is a postdoctoral research fellow (Electrical & Electronic Engineering) at the SUSTech, China. His current research focuses on the quantum dot (QD) lightning: near infra-red QD-based light-emitting diodes (NIR QLEDs) and silver nanowire (AgNW). Mikita obtained his PhD degree from the Nanyang Technological University (NTU), Singapore, in October 2017. From 2012 to 2013, he conducted research on LEDs & LED lighting solutions for industrial light applications at the National Academy of Sciences (NAS) of Belarus, in Minsk. Mikita has published 15 journal articles, had 4 conference presentations, and holds 1 patent.
Ms. Venus Pang (eevenus@ust.hk)