Nature Communications (Jul 2020)

Sub-single exciton optical gain threshold in colloidal semiconductor quantum wells with gradient alloy shelling

  • Nima Taghipour,
  • Savas Delikanli,
  • Sushant Shendre,
  • Mustafa Sak,
  • Mingjie Li,
  • Furkan Isik,
  • Ibrahim Tanriover,
  • Burak Guzelturk,
  • Tze Chien Sum,
  • Hilmi Volkan Demir

DOI
https://doi.org/10.1038/s41467-020-17032-8
Journal volume & issue
Vol. 11, no. 1
pp. 1 – 8

Abstract

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Colloidal quantum wells are highly promising for applications of solution-processed lasers, but their performance is limited by multi-excitonic nature of the materials. Here, the authors demonstrate optical gain in graded alloy core/shell CdSe/CdS@CdZnS quantum wells at less than one exciton per particle resulting in ultralow thresholds.