Carrier cooling in colloidal quantum wells

Matthew Pelton, Sandrine Ithurria, Richard D Schaller, Dmitriy S. Dolzhnikov, Dmitri V. Talapin

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

It has recently become possible to chemically synthesize atomically flat semiconductor nanoplatelets with monolayer-precision control over the platelet thickness. It has been suggested that these platelets are quantum wells; that is, carriers in these platelets are confined in one dimension but are free to move in the other two dimensions. Here, we report time-resolved photoluminescence and transient-absorption measurements of carrier relaxation that confirm the quantum-well nature of these nanomaterials. Excitation of the nanoplatelets by an intense laser pulse results in the formation of a high-temperature carrier population that cools back down to ambient temperature on the time scale of several picoseconds. The rapid carrier cooling indicates that the platelets are well-suited for optoelectronic applications such as lasers and modulators.

Original languageEnglish
Pages (from-to)6158-6163
Number of pages6
JournalNano Letters
Volume12
Issue number12
DOIs
Publication statusPublished - Dec 12 2012

Fingerprint

Platelets
platelets
Semiconductor quantum wells
quantum wells
Cooling
cooling
Nanostructured materials
Optoelectronic devices
Modulators
ambient temperature
lasers
modulators
Laser pulses
Monolayers
Photoluminescence
Semiconductor materials
photoluminescence
Temperature
Lasers
pulses

Keywords

  • carrier relaxation
  • Quantum wells
  • semiconductor nanocrystals

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Pelton, M., Ithurria, S., Schaller, R. D., Dolzhnikov, D. S., & Talapin, D. V. (2012). Carrier cooling in colloidal quantum wells. Nano Letters, 12(12), 6158-6163. https://doi.org/10.1021/nl302986y

Carrier cooling in colloidal quantum wells. / Pelton, Matthew; Ithurria, Sandrine; Schaller, Richard D; Dolzhnikov, Dmitriy S.; Talapin, Dmitri V.

In: Nano Letters, Vol. 12, No. 12, 12.12.2012, p. 6158-6163.

Research output: Contribution to journalArticle

Pelton, M, Ithurria, S, Schaller, RD, Dolzhnikov, DS & Talapin, DV 2012, 'Carrier cooling in colloidal quantum wells', Nano Letters, vol. 12, no. 12, pp. 6158-6163. https://doi.org/10.1021/nl302986y
Pelton M, Ithurria S, Schaller RD, Dolzhnikov DS, Talapin DV. Carrier cooling in colloidal quantum wells. Nano Letters. 2012 Dec 12;12(12):6158-6163. https://doi.org/10.1021/nl302986y
Pelton, Matthew ; Ithurria, Sandrine ; Schaller, Richard D ; Dolzhnikov, Dmitriy S. ; Talapin, Dmitri V. / Carrier cooling in colloidal quantum wells. In: Nano Letters. 2012 ; Vol. 12, No. 12. pp. 6158-6163.
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