| Authors: | Yolanda Justo, Bart Goris, John Sundar Kamal, P. Geiregat, Sara Bals, Zeger Hens | | Title: | Multipe Dot-in-Rod PbS/CdS Heterostructures with High Photoluminescence Quantum Yield in the Near-Infrared | | Format: | International Journal | | Publication date: | 3/2012 | | Journal/Conference/Book: | Journal of the American Chemical Society
| | Volume(Issue): | 134(12) p.5484–5487 | | DOI: | 10.1021/ja300337d | | Citations: | 49 (Dimensions.ai - last update: 24/11/2024)
17 (OpenCitations - last update: 10/5/2024)
Look up on Google Scholar
| | Download: |
 (282KB) |
Abstract
Pb cations in PbS quantum rods made from CdS quantum rods by successive complete cationic exchange reactions are partially re-exchanged for Cd cations. Using STEM-HAADF, we show that this leads to the formation of unique multiple dot-in-rod PbS/CdS heteronanostructures, with a photoluminescence quantum yield of 45–55%. We argue that the formation of multiple dot-in-rods is related to the initial polycrystallinity of the PbS quantum rods, where each PbS crystallite transforms in a separate PbS/CdS dot-in-dot. Effective mass modeling indicates that electronic coupling between the different PbS conduction band states is feasible for the multiple dot-in-rod geometries obtained, while the hole states remain largely uncoupled. Related Research Topics
|
|
|
|
|
Citations (OpenCitations)
|
|
