Abstract
The semiconductor quantum dots (QDs) at the single-particle level exhibit mysterious episodes of photoluminescence (PL) intermittency, often called PL blinking, represented by ON-, GRAY-, and OFF-states which occur due to the trapping of charge carriers and Auger recombination. The first part of the presentation will discuss single-particle charge carrier dynamics in various QDs by employing various time-resolved PL measurements and strategies for controlling the undesirable OFF-states.1,2 Approaches for estimating single exciton and biexciton quantum yield in QDs and nanoplatelets, along with synthetic strategies for controlling exciton purity will be presented in the second part of the presentation.3 The presentation will also cover newer strategies for enhancing PL of QDs through plasmon resonance coupling.4 The last part of the presentation will focus on the potential applications of QDs in energy5 and electron transfer processes.6-8 By following various time-resolved transient absorption spectroscopic methods, we have demonstrated that the presence of deep hole trap states in InP QDs retards the charge recombination to a sub-millisecond timescale, which is seven orders of magnitude lower than that in CdSe QDs having shallow trap states.7 The role of the size of InP QDs on indium to phosphorous stoichiometry and the trap state distribution will also be discussed.8 K. Vishnu, A. A. K. Nair, K. George Thomas, J. Phys. Chem. C, 125, 25706 (2021).M. Thomas, N. Pradhan, K. George Thomas, ACS Energy Lett., 7, 2856 (2022).K. Vishnu, A. A. K. Nair, K. George Thomas (under publication 2023).M. Thomas, C. L. Cortes, L. Paul, S. K. Gray, K. George Thomas, Phys. Chem. Chem. Phys., 24, 17250 (2022). Manoj, S. M. Somasundaran, D. Rajan, S. Thirunavukkuarasu, K. George Thomas, J. Phys. Chem. B 126, 2635 (2022).Sandeep, B. Manoj,K. George Thomas,J. Chem. Phys.,152, 044710 (2020).Thomas, K. Sandeep, S. M. Somasundaran, K. George Thomas, ACS Energy Lett. 3, 2368 (2018).Manoj, D. Rajan, K. George Thomas, J. Chem. Phys., 158, 174706 (2023).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
