Multigram Scale, Solventless, and Diffusion-Controlled Route to Highly Monodisperse PbS Nanocrystals
- 22 December 2005
- journal article
- letter
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry B
- Vol. 110 (2), 671-673
- https://doi.org/10.1021/jp0563585
Abstract
High-quality PbS nanocrystals were produced in multigram-scale quantities through a solventless, heterogeneous, and relatively green route. The heterogeneous nature of this reaction allows one to limit the diffusion in the system, allowing for unprecedented monodispersity and quality of the product demonstrated by a full-width at half-maximum of the photoluminescence peak (PL fwhm) as low as 52 meV, a Stokes shift as low as 10 meV, and a quantum yield (QY) of 40%. The growth of the nanocrystals is interpreted in the framework of a diffusion-controlled Ostwald growth in conditions of strong supersaturation.Keywords
This publication has 19 references indexed in Scilit:
- Nanocrystals as Precursors for Flexible Functional FilmsSmall, 2005
- Large-Area Ordered Quantum-Dot Monolayers via Phase Separation During Spin-CastingAdvanced Functional Materials, 2005
- Designing PbSe Nanowires and Nanorings through Oriented Attachment of NanoparticlesJournal of the American Chemical Society, 2005
- Highly Efficient Multiple Exciton Generation in Colloidal PbSe and PbS Quantum DotsNano Letters, 2005
- Pushing the Band Gap Envelope: Mid-Infrared Emitting Colloidal PbSe Quantum DotsJournal of the American Chemical Society, 2004
- Shape Evolution and Self Assembly of Monodisperse PbTe NanocrystalsJournal of the American Chemical Society, 2004
- PbS Quantum Dots with Stable Efficient Luminescence in the Near‐IR Spectral RangeAdvanced Materials, 2004
- High Efficiency Carrier Multiplication in PbSe Nanocrystals: Implications for Solar Energy ConversionPhysical Review Letters, 2004
- Optical Properties of Colloidal PbSe NanocrystalsNano Letters, 2002
- Evolution of an Ensemble of Nanoparticles in a Colloidal Solution: Theoretical StudyThe Journal of Physical Chemistry B, 2001