Ultrafast spectroscopy studies of carrier dynamics in semiconductor nanocrystals.

Autor:	Keene JD; Department of Chemistry, Mercer University, Macon, GA 31207, USA., Freymeyer NJ; Department of Chemistry, Vanderbilt University, Nashville, TN 37240, USA.; Vanderbilt Institute of Nanoscale Science and Engineering, Vanderbilt University, Nashville, TN 37240, USA., McBride JR; Department of Chemistry, Vanderbilt University, Nashville, TN 37240, USA.; Vanderbilt Institute of Nanoscale Science and Engineering, Vanderbilt University, Nashville, TN 37240, USA., Rosenthal SJ; Department of Chemistry, Vanderbilt University, Nashville, TN 37240, USA.; Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37240, USA.; Department of Pharmacology, Vanderbilt University, Nashville, TN 37240, USA.; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37240, USA.; Department of Materials Science, Vanderbilt University, Nashville, TN 37240, USA.; Vanderbilt Institute of Nanoscale Science and Engineering, Vanderbilt University, Nashville, TN 37240, USA.; Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, TN 37240, USA.
Jazyk:	angličtina
Zdroj:	IScience [iScience] 2022 Feb 01; Vol. 25 (2), pp. 103831. Date of Electronic Publication: 2022 Feb 01 (Print Publication: 2022).
DOI:	10.1016/j.isci.2022.103831
Abstrakt:	Semiconductor nanocrystals have become ubiquitous both in scientific research and in applied technologies related to light. When a nanocrystal absorbs a photon an electron-hole pair is created whose fate dictates whether the nanocrystal will be suitable for a particular application. Ultrafast spectroscopy provides a real-time window to monitor the evolution of the electron-hole pair. In this review, we focus on CdSe nanocrystals, the most-studied nanocrystal system to date, and also highlight ultrasmall nanocrystals, "standard nanocrystals" of different binary composition, alloyed nanocrystals, and core/shell nanocrystals and nanorods. We focus on four time-resolved spectroscopies used to interrogate nanocrystals: pump-probe, fluorescence upconversion, time-correlated single photon counting, and non-linear spectroscopies. The basics of the nanocrystals and the spectroscopies are presented, followed by a detailed synopsis of ultrafast spectroscopy studies performed on the various semiconductor nanocrystal systems. Competing Interests: The authors declare no competing interests. (© 2022 The Author(s).)
Databáze:	MEDLINE
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