Unveiling the Role of ZnCl₂ in Enhancing the Photoluminescence Efficiency of Amino-As-Based InAs@ZnSe Quantum Dots.

ABSTRACT: We investigated how ZnCl₂, employed as an additive in the amino-As-based synthesis of indium arsenide (InAs) quantum dots (QDs), considerably improves the photoluminescence quantum yield (PLQY) of the resulting InAs@ZnSe core@shell QDs. We achieved this by synthesizing and comparing three distinct InAs QD samples and their corresponding core@shell structures: (1) In(Zn)As QDs (synthesized with ZnCl₂); (2) standard InAs QDs (std-InAs, made without additives); and (3) std-InAs QDs postsynthesis treated with ZnCl₂ (Zn-InAs). High PLQY values (∼70%) were attained only with In(Zn)As@ZnSe QDs, while std-InAs@ZnSe and Zn-InAs@ZnSe samples exhibited much lower PL efficiencies (10-20%). We also demonstrated that (i) the high PLQY in In(Zn)As@ZnSe QDs could not be at

SUBMITTER: Zhu D 

PROVIDER: S-EPMC12509302 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature