Exciton–Exciton Interaction and Optical Gain in Colloidal CdSe/CdS Dot/Rod Nanocrystals
- 21 December 2009
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 21 (48) , 4942-4946
- https://doi.org/10.1002/adma.200901482
Abstract
Exciton–exciton interaction in dot/rod CdSe/CdS nanocrystals has proved to be very sensitive to the shape of nanocrystals, due to the unique band alignment between CdSe and CdS. Repulsive exciton–exciton interaction is demonstrated, which makes CdSe/CdS dot/rods promising gain media for solution-processable lasers, with projected pump threshold densities below 1 kW cm−2 for continuous wave lasing.Keywords
Funding Information
- Italian MIUR
- INFM-CNR Seed project for young researchers
- FIRB-MIUR project (Synergy-FIRBRBNE03S7XZ)
- Human Potential Programs (RTN Nanomatch) (MRTN-CT-2006-035884)
- Austrian Nano-Initiative (project NSI)
- Austrian Science Fund FWF (START Y179)
This publication has 23 references indexed in Scilit:
- Hybrid optoelectronics: A polymer laser pumped by a nitride light-emitting diodeApplied Physics Letters, 2008
- Single-exciton optical gain in semiconductor nanocrystalsNature, 2007
- Multiexcitons in type-II colloidal semiconductor quantum dotsPhysical Review B, 2007
- Effect of Quantum and Dielectric Confinement on the Exciton−Exciton Interaction Energy in Type II Core/Shell Semiconductor NanocrystalsNano Letters, 2006
- Ultrasensitive solution-cast quantum dot photodetectorsNature, 2006
- Monitoring Surface Charge Movement in Single Elongated Semiconductor NanocrystalsPhysical Review Letters, 2004
- Colloidal nanocrystal synthesis and the organic–inorganic interfaceNature, 2004
- Shape Effects on Electronic States of NanocrystalsNano Letters, 2003
- (CdSe)ZnS Core−Shell Quantum Dots: Synthesis and Characterization of a Size Series of Highly Luminescent NanocrystallitesThe Journal of Physical Chemistry B, 1997
- Epitaxial Growth of Highly Luminescent CdSe/CdS Core/Shell Nanocrystals with Photostability and Electronic AccessibilityJournal of the American Chemical Society, 1997