Many two-dimensional (2D) semiconductors show promise for photovoltaic applications due to their desirable bandgap and predicted long carrier lifetimes. One 2D solar energy material candidate is BiI3. A time-resolved photoluminescence system, using time-correlated single photon counting (TCSPS), was established and used in conjunction with an existing spectrally-resolved photoluminescence spectroscopy apparatus for characterization of BiI3. A main peak was found at 1.82 eV and a wider peak at 1.67eV with carrier lifetimes of ~270 ps at the main peak. The optical properties of BiI3 were found to be uniform across the crystal surface. Future work will correlate these results with time-resolved terahertz spectroscopy in order to get a complete picture of photoexcited carrier dynamics.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• Buzzell, Alexis Taylor
• Mendizabal, Andrew

Publisher

• Worcester Polytechnic Institute

Identifier

• E-project-042419-092820

Advisor

• Titova, Lyubov

Year

• 2019

Date created

• 2019-04-24

Resource type

• Major Qualifying Project

Major

• Physics

Rights statement

• In Copyright