Year-end Sale % OFF 
Abstract
Effective surface passivation of lead sulfide (PbS) nanocrystals (NCs) in an aqueous colloidalsolution has been achieved following treatment with CdS precursors. The resultantphotoluminescent emission displays two distinct components, one originating from theabsorption band edge and the other from above the absorption band edge. We show thatboth of these components are strongly polarized but display distinctly different behaviours.The polarization arising from the band edge shows little dependence on the excitationenergy while the polarization of the above-band-edge component is strongly dependent onthe excitation energy. In addition, time-resolved polarization spectroscopy reveals that theabove-band-edge polarization is restricted to the first couple of nanoseconds, whilethe band edge polarization is nearly constant over hundreds of nanoseconds. Werecognize an incompatibility between the two different polarization behaviours,which enables us to identify two distinct types of surface-passivated PbS NC.
Submitted Version (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
