Significance of Small-Sized PbSe/PbS Core/Shell Colloidal Quantum Dots for Optoelectronic Applications
| Autor: | Anna Rubin-Brusilovski, Efrat Lifshitz, Diana Yanover, Jenya Tilchin, Richard Capek, Aldona Sashchiuk, Roman Vaxenburg, Gary Zaiats |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Photoluminescence business.industry Band gap Shell (structure) Quantum yield Nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Surfaces Coatings and Films Electronic Optical and Magnetic Materials Core (optical fiber) Condensed Matter::Materials Science General Energy Semiconductor Quantum dot Optoelectronics Colloidal quantum dots Physical and Theoretical Chemistry business |
| Zdroj: | The Journal of Physical Chemistry C. 118:17001-17009 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp500471s |
| Popis: | Small-sized colloidal quantum dots (QDs) consisting of IV–VI semiconductors with the PbSe/PbS core/shell structure were synthesized by a specially developed wet-chemistry method. Their electronic properties were determined by the comparison of theoretical calculations with continuous-wave and transient photoluminescence measurements conducted at various temperatures. The results revealed the formation of quantum dots characterized by a tunable band gap around 1 μm, lifetime exceeding 4.0 μs at room temperature, photoluminescence quantum yield >60%, and resistance to oxidation for a relatively long period of time. The properties of the QDs vary with the core/shell architecture, which is beneficial for their optoelectronic applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|