Tuning the emission of CdSe quantum dots by controlled trap enhancement

227Citations
Citations of this article
275Readers
Mendeley users who have this article in their library.
Get full text

Abstract

Ligand exchange with 3-mercaptopropionic acid (MPA) has been successfully used to tune the emission intensity of trioctylphosphineoxide/dodecylamine- capped CdSe quantum dots. Addition of 3-mercaptopropionic acid (MPA) to CdSe quantum dot suspension enhances the deep trap emission with concurrent quenching of the band edge emission. The smaller sized quantum dots, because of larger surface/volume ratio, create a brighter trap emission and are more easily tuned. An important observation is that the deep trap emission which is minimal after synthesis is brightened to have a quantum yield of 1-5% and can be tuned based on the concentration of MPA in solution with the quantum dots. Photoluminescence decay and transient absorption measurements reveal the role of surface bound MPA in altering the photophysical properties of CdSe quantum dots. © 2010 American Chemical Society.

Cite

CITATION STYLE

APA

Baker, D. R., & Kamat, P. V. (2010). Tuning the emission of CdSe quantum dots by controlled trap enhancement. Langmuir, 26(13), 11272–11276. https://doi.org/10.1021/la100580g

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free