Design and Synthesis of CdHgSe/HgS/CdZnS Core/Multi-Shell Quantum Dots Exhibiting High-Quantum-Yield Tissue-Penetrating Shortwave Infrared Luminescence.

ABSTRACT: Cd_x Hg_{1- x} Se/HgS/Cd_y Zn_{1- y} S core/multi-shell quantum dots (QDs) exhibiting bright tissue-penetrating shortwave infrared (SWIR; 1000-1700 nm) photoluminescence (PL) are engineered. The new structure consists of a quasi-type-II Cd_x Hg_{1- x} Se/HgS core/inner shell domain creating luminescent bandgap tunable across SWIR window and a wide-bandgap Cd_y Zn_{1- y} S outer shell boosting the PL quantum yield (QY). This compositional sequence also facilitates uniform and coherent shell growth by minimizing interfacial lattice mismatches, resulting in high QYs in both organic (40-80%) and aqueous (20-70%) solvents with maximum QYs of 87 and 73%, respectively, which are com

SUBMITTER: Lee G 

PROVIDER: S-EPMC11341011 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature