Physics Chat
Understanding carrier dynamics in CuInZnS3 quantum dots toward high-performance photovoltaics
Speaker: Nasser Alhazmi (Prof Wolfgang Langbein' group)
Date: Thursday 14 December 2023
Time: 14:00
Venue: Queen's building N/2.05
The optical features of CuInZnS3 Quantum Dots (QD) would play a significant role in future of solar technology. The broad absorption and the large Stokes shift could enhance the solar cell absorption because the large stokes shift prevent any emission reabsorption which in return increase the efficiency. However, missing knowledge regarding the carrier dynamics in such QD is challenge for optimising their performance and making commercial progress in this technology. The main mechanism for the broad photoluminescence (PL) and the absorption is still not fully understood for these QDs. Studies have been conducted that the interaction between the hole and the phonons in these QDs could be responsible for the broad PL and the recombination mechanism. This presentation would provide a possible explanation for the optical feature in CuInZnS3 QD. Moreover, Galileo microscope measurement of single QD illustrates dipole emission which is strong evidence of the interaction between the hole and the phonons in CuInZnS3 QDs.