Surface Stabilized InP/GaP/ZnS Quantum Dots with Mg Ions for WLED Application
| Autor: | Joong Pill Park, Sang-Wook Kim |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Biomedical Engineering chemistry.chemical_element Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Effective solution law.invention Ion law General Materials Science Photoluminescence quenching business.industry Magnesium General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Quantum dot Yield (chemistry) Optoelectronics 0210 nano-technology Luminous efficacy business Light-emitting diode |
| Zdroj: | Journal of nanoscience and nanotechnology. 16(5) |
| ISSN: | 1533-4899 |
| Popis: | One of the most highlighted cadmium-free quantum dots (QDs), InP-based QDs, have improved their optical properties. However, InP-based QDs have some practical drawbacks, for example, stability, compared with CdSe-based QDs. Poor stability of InP-based QDs yields critical problems, such as agglomeration and photoluminescence quenching in light emitting diode (LED). It has to be solved for applications and most research has focused on thick outer shells as an effective solution. We introduced magnesium cations for improving stability of InP-based QDs. We applied very small amounts of Mg cations as surface stabilizers, as a result, stability of QDs is clearly improved. Then, QD based LED chips also yield improved values including RA of 84.4, CCT of 3799 K, and luminous efficiency of 129.57 Im/W, which are highly improved data compared with our previous results. |
| Databáze: | OpenAIRE |
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