Optical properties of colloidal aqueous synthesized 3 mercaptopropionic acid stabilized CdS quantum dots
| Autor: | H.M. Mahesh, B. Jai Kumar, D. Sumanth Kumar |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Potential well
Photoluminescence Absorption spectroscopy Chemistry business.industry Band gap Physics::Optics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect law.invention Condensed Matter::Materials Science Brus equation law Quantum dot Solar cell Optoelectronics business Absorption (electromagnetic radiation) |
| Zdroj: | AIP Conference Proceedings. |
| ISSN: | 0094-243X |
| DOI: | 10.1063/1.4946213 |
| Popis: | We have explored an easiest and simplest aqueous route to synthesize bright green luminescent CdS QDs using 3-Mercaptopropionic acid (MPA) as a stabilizer in air ambient for solar cell applications. The CdS quantum dots showed a strong quantum confinement effect with good stability, size and excellent photoluminescence. MPA Capping on CdS QDs was confirmed through FTIR. The Optical absorption spectrum revealed the CdS quantum dots are highly transparent in the visible region with absorption peak at 380 nm, confirming the quantum confinement. Photoluminescence showed an emission peak at 525 nm wavelength. The optical band gap energy was found to be 3.19 eV and CdS quantum dots radius calculated using Brus equation is 1.5 nm. The results are presented and discussed in detail. |
| Databáze: | OpenAIRE |
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