Source abstract
Abstract
Abstract Given the ubiquitous examples of semiconductor nanorods synthesis, CuInS2‐based anisotropic heterostructures still lag behind in terms of shape/optical properties control. Here, core/shell CuInS2/CdS dot‐in‐rod nanoheterostructures which exhibit high degree of the morphology control, and a strong emission in the near‐infrared range of 700–900 nm, are realized. The authors made use of the seeded growth approach utilizing wurtzite CuInS2 quantum dots as seeds, which allows for tuning the dimension of the resulting core/shell nanorods, including the core size and the shell thickness. Time‐dependent photoluminescence studies reveal slowing down of the recombination rate with increasing thickness of the shell, which is characteristic for the quasi‐type II heterostructure. Alloying of the CuInS2 cores with Zn does not perturb the shell growth process, but enables improvement of the photoluminescence quantum yield of the resulting core/shell CuInZnS2/CdS nanorods to 45%, as compared to ≈30% for CuInS2/CdS nanorods.
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Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Copper-based nanomaterials and applications
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Affiliations
Department of Materials Science and Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong SAR 999077 P. R. China
Shenzhen Futian Research Institute City University of Hong Kong Shenzhen 518048 P. R. China
Nanomanufacturing Laboratory (NML) Shenzhen Research Institute City University of Hong Kong Shenzhen 518057 P. R. China
Department of Physics The Hong Kong University of Science and Technology City University of Hong Kong Clear Water Bay Hong Kong SAR 999077 P. R. China
Funding
City University of Hong Kong
References (30)
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