Highly Luminescent (Zn,Cd)Te/CdSe Colloidal Heteronanowires with Tunable Electron–Hole Overlap
- 3 January 2012
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 12 (2), 749-757
- https://doi.org/10.1021/nl203695m
Abstract
We report the synthesis of ultranarrow (Zn,Cd)Te/CdSe colloidal heteronanowires, using ZnTe magic size clusters as seeds. The wire formation starts with a partial Zn for Cd cation exchange, followed by self-organization into segmented heteronanowires. Further growth occurs by inclusion of CdSe. The heteronanowires emit in the 530 to 760 nm range with high quantum yields. The electron–hole overlap decreases with increasing CdSe volume fraction, allowing the optical properties to be controlled by adjusting the heteronanowire composition.Keywords
This publication has 51 references indexed in Scilit:
- Nano-engineered electron–hole exchange interaction controls exciton dynamics in core–shell semiconductor nanocrystalsNature Communications, 2011
- Emergent Properties Resulting from Type‐II Band Alignment in Semiconductor NanoheterostructuresAdvanced Materials, 2010
- Synthesis and properties of colloidal heteronanocrystalsChemical Society Reviews, 2010
- Formation of nanoscale spatially indirect excitons: Evolution of the type-II optical character of CdTe/CdSe heteronanocrystalsPhysical Review B, 2010
- Core/Shell Semiconductor NanocrystalsSmall, 2009
- Slow Electron Cooling in Colloidal Quantum DotsScience, 2008
- Type-II Core/Shell CdS/ZnSe Nanocrystals: Synthesis, Electronic Structures, and Spectroscopic PropertiesJournal of the American Chemical Society, 2007
- Multiexcitons in type-II colloidal semiconductor quantum dotsPhysical Review B, 2007
- Synthesis of CdSe/CdTe NanobarbellsJournal of the American Chemical Society, 2006
- Type-II Quantum Dots: CdTe/CdSe(Core/Shell) and CdSe/ZnTe(Core/Shell) HeterostructuresJournal of the American Chemical Society, 2003