Near-Unity Quantum Yields from Chloride Treated CdTe Colloidal Quantum Dots
| Title | Near-Unity Quantum Yields from Chloride Treated CdTe Colloidal Quantum Dots |
| Publication Type | Journal Article |
| Year of Publication | 2014 |
| Authors | Page, RC, Espinobarro-Velazquez, D, Leontiadou, MA, Smith, C, Lewis, EA, Haigh, SJ, Li, C, Radtke, H, Pengpad, A, Bondino, F, Magnano, E, Pis, I, Flavell, WR, O\'Brien, P, Binks, DJ |
| Journal | Small |
| ISSN | 1613-6829 |
| Keywords | colloidal quantum dots, nanocrystalline materials, passivation, Photoelectron spectroscopy, photoluminescence, transmission electron microscopy |
| Abstract | Colloidal quantum dots (CQDs) are promising materials for novel light sources and solar energy conversion. However, trap states associated with the CQD surface can produce non-radiative charge recombination that significantly reduces device performance. Here a facile post-synthetic treatment of CdTe CQDs is demonstrated that uses chloride ions to achieve near-complete suppression of surface trapping, resulting in an increase of photoluminescence (PL) quantum yield (QY) from ca. 5% to up to 97.2 |
| URL | http://dx.doi.org/10.1002/smll.201402264 |
| DOI | 10.1002/smll.201402264 |
