Suppressed Auger recombination and enhanced emission of InP/ZnSe/ZnS quantum dots through inner shell manipulation
Yaru Chen, Rixin Wang, Yanmin Kuang, Yangyang Bian, Fei Chen, Huaibin Shen, Zhen Chi, Xia Ran, Lijun Guo
Abstract
defect passivation. Accordingly, the radiative recombination dominates the exciton deactivation and the non-radiative Auger recombination rate is remarkably reduced, leading to a QY close to unity and a high PL stability for InP/ZnSe/ZnS QDs with 5 MLs of the ZnSe shell. These results provide insights into the photophysical mechanism of InP-based QDs and are significant for developing novel semiconductor PL core/shell QDs.
Topics & Concepts
Quantum dotAuger effectShell (structure)ExcitonFluorescenceMaterials scienceOptoelectronicsRecombinationAugerPhotoluminescencePhotonAtomic physicsChemistryPhysicsCondensed matter physicsOpticsBiochemistryGeneComposite materialQuantum Dots Synthesis And PropertiesSemiconductor Quantum Structures and DevicesChalcogenide Semiconductor Thin Films