BYU

Abstract by James Erikson

Personal Infomation


Presenter's Name

James Erikson

Degree Level

Undergraduate

Co-Authors

Emma McClure
Dr. John Colton
Dr. Troy Munro

Abstract Infomation


Department

Physics and Astronomy

Faculty Advisor

John Colton

Title

Photoluminescence Lifetime Measurements of CdTe Quantum Dots

Abstract

Quantum dots are molecules made to a specific size in order to preserve quantum properties, which allows them to be useful in a variety of applications. We are investigating CdTe quantum dots with an energy gap tuned to 1.9 eV for potential use as a non-invasive medical temperature sensor. In particular, we have used time correlated single photon counting to measure the temperature dependence of the photoluminescence lifetime of the dots. Samples are excited with a 520 nm laser at temperatures ranging from 15K to 300K, and the lifetime is determined through a deconvolution of the measured data and the instrument response function of our equipment. Preliminary results have shown no particular temperature dependence, however more measurements need to be taken before conclusions can be drawn.