Determination of the carrier temperature in weakly confined semiconductor nanocrystals using time-resolved optical spectroscopy.

ABSTRACT: Many applications of nanocrystals rely on their use in light detection and emission. In recent years, nanocrystals with more relaxed carrier confinement, including so-called 'bulk' and 2D implementations, have made their stake. In such systems, the charge carriers generated after (photo-)excitation are spread over a semi-continuous density of states, behaviour controlled by the carrier temperature T. Current established methods to measure this dynamically changing temperature include transient absorption and luminescence spectroscopy, yet they very often fail to agree on the exact temperature leading to contradicting reports. Here, we show through a combined side-by-side experimental and theoretical study on state-of-art II-VI and perovskite nanocrystals under weak confinement that

SUBMITTER: Tanghe I 

PROVIDER: S-EPMC12687414 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature