ArticleACS applied materials & interfaces2021
Cadmium-Free and Efficient Type-II InP/ZnO/ZnS Quantum Dots and Their Application for LEDs.
Article in ACS applied materials & interfaces, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed.
- Review
- CsPbBrAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Review
- Insights from core/shell ZnCuInS/ZnS nanocrystals, type-II confinement, and implications for the design of safer industrial nanocrystals.Scientific reports · 2025Article
- The Impact of Cadmium Selenide Zinc Sulfide Quantum Dots on the Proteomic Profile ofInternational journal of molecular sciences · 2023Article
- Enzymatic and Bioinspired Systems for Hydrogen Production.International journal of molecular sciences · 2023Review
- Red CdSe/ZnS QDs' Intracellular Trafficking and Its Impact on Yeast Polarization and Actin Filament.Cells · 2023Article
- Indium arsenide quantum dots: an alternative to lead-based infrared emitting nanomaterials.Chemical Society reviews · 2022Review
- Quantum Dots and Their Interaction with Biological Systems.International journal of molecular sciences · 2022Review
- A Novel and Cost-Effective CsVONanomaterials (Basel, Switzerland) · 2022Article
- Optoelectronic Neural Interfaces Based on Quantum Dots.ACS applied materials & interfaces · 2022Review
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Authors and funding
14 authors.
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Abstract
It is a generally accepted perspective that type-II nanocrystal quantum dots (QDs) have low quantum yield due to the separation of the electron and hole wavefunctions. Recently, high quantum yield levels were reported for cadmium-based type-II QDs. Hence, the quest for finding non-toxic and efficient type-II QDs is continuing. Herein, we demonstrate environmentally benign type-II InP/ZnO/ZnS core/shell/shell QDs that reach a high quantum yield of ∼91%. For this, ZnO layer was grown on core InP QDs by thermal decomposition, which was followed by a ZnS layer via successive ionic layer adsorption. The small-angle X-ray scattering shows that spherical InP core and InP/ZnO core/shell QDs turn into elliptical particles with the growth of the ZnS shell. To conserve the quantum efficiency of QDs in device architectures, InP/ZnO/ZnS QDs were integrated in the liquid state on blue light-emitting diodes (LEDs) as down-converters that led to an external quantum efficiency of 9.4% and a power conversion efficiency of 6.8%, respectively, which is the most efficient QD-LED using type-II QDs. This study pointed out that cadmium-free type-II QDs can reach high efficiency levels, which can stimulate novel forms of devices and nanomaterials for bioimaging, display, and lighting.
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