Borys, Nicholas J. and Walter, Manfred J. and Huang, Jing and Talapin, Dmitri V. and Lupton, John M. (2010) The Role of Particle Morphology in Interfacial Energy Transfer in CdSe/CdS Heterostructure Nanocrystals. SCIENCE, 330 (6009). pp. 1371-1374. ISSN 0036-8075, 1095-9203
Full text not available from this repository. (Request a copy)Abstract
Nanoscale semiconductor heterostructures such as tetrapods can be used to mimic light-harvesting processes. We used single-particle light-harvesting action spectroscopy to probe the impact of particle morphology on energy transfer and carrier relaxation across a heterojunction. The generic form of an action spectrum [in our experiments, photoluminescence excitation (PLE) under absorption in CdS and emission from CdSe in nanocrystal tetrapods, rods, and spheres] was controlled by the physical shape and resulting morphological variation in the quantum confinement parameters of the nanoparticle. A correlation between single-particle PLE and physical shape as determined by scanning electron microscopy was demonstrated. Such an analysis links local structural non-uniformities such as CdS bulbs forming around the CdSe core in CdSe/CdS nanorods to a lower probability of manifesting excitation energy-dependent emission spectra, which in turn is probably related to band alignment and electron delocalization at the heterojunction interface.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SEMICONDUCTOR NANOCRYSTALS; QUANTUM DOTS; GROWTH; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Jul 2020 08:36 |
| Last Modified: | 06 Jul 2020 08:36 |
| URI: | https://pred.uni-regensburg.de/id/eprint/23751 |
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