Temperature-Dependent Recombination Processes in Small-Sized PbSe/PbS Core/Shell Colloidal Quantum Dots
The work focuses on the optical investigation of temperature-dependent recombination processes in small-sized PbSe/PbS core/shell colloidal quantum dots (CQDs) with core diameter of (2 – 2.5) nm and the shell thickness of (0.5 – 1.0) nm under air-free conditions and after air exposure. These CQDs h...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Kaunas University of Technology
2014-06-01
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| Series: | Medžiagotyra |
| Subjects: | |
| Online Access: | http://matsc.ktu.lt/index.php/MatSc/article/view/6321 |
| Summary: | The work focuses on the optical investigation of temperature-dependent recombination processes in small-sized PbSe/PbS core/shell colloidal quantum dots (CQDs) with core diameter of (2 – 2.5) nm and the shell thickness of (0.5 – 1.0) nm under air-free conditions and after air exposure. These CQDs have a tunable absorption edge around 1 μm and a rather narrow photoluminescence linewidth, their emission recombination process is characterized by the μs time-scale and by longer radiative lifetimes in the entire temperature range and especially at low temperatures (a 2.6-fold increase) as compared to the corresponding PbSe samples. The PbSe/PbS core/shell CQDs are oxidation-stable towards time-limited air exposure. <p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.20.2.6321">http://dx.doi.org/10.5755/j01.ms.20.2.6321</a></p> |
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| ISSN: | 1392-1320 2029-7289 |