Investigation of steady-state and time-dependent luminescence properties of colloidal InGaP quantum dots

Subhasish Chatterjee, Vinod M. Menon, Nikesh V. Valappil

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Quantum dots play a promising role in the development of novel optical and biosensing devices. In this study, we investigated steady state and time-dependent luminescence properties of InGaP/ZnS core/shell colloidal quantum dots in a solution phase at room temperature. The steady state experiments exhibited an emission maximum at 650 nm with full width at half maximum of - 85 nm, and strong first-excitonic absorption peak at 600 nm. The time-resolved luminescence measurements depicted a bi-exponential decay profile with lifetimes of x\∼47 ns and x2∼ 142 ns at the emission maximum. Additionally, luminescence quenching and lifetime reduction due to resonance energy transfer between the quantum dot and an absorber are demonstrated. Our results support the plausibility of using these InGaP quantum dots as an effective alternative to highly toxic conventional Cd or Pb based colloidal quantum dots for biological applications.

Original languageEnglish
Title of host publicationMaterials for Optical Sensors in Biomedical Applications
Pages53-58
Number of pages6
StatePublished - 2008
Event2008 MRS Fall Meeting - Boston, MA, United States
Duration: 1 Dec 20085 Dec 2008

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1133
ISSN (Print)0272-9172

Conference

Conference2008 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA
Period1/12/085/12/08

Fingerprint

Dive into the research topics of 'Investigation of steady-state and time-dependent luminescence properties of colloidal InGaP quantum dots'. Together they form a unique fingerprint.

Cite this