Correlation between size distribution and luminescence properties of spool-shaped InAs quantum dots

H. Xie, R. Prioli, G. Torelly, H. Liu, A. M. Fischer, R. Jakomin, R. Mourão, R. Kawabata, M. P. Pires, P. L. Souza, Fernando Ponce

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

InAs QDs embedded in an AlGaAs matrix have been produced by MOVPE with a partial capping and annealing technique to achieve controllable QD energy levels that could be useful for solar cell applications. The resulted spool-shaped QDs are around 5 nm in height and have a log-normal diameter distribution, which is observed by TEM to range from 5 to 15 nm. Two photoluminescence peaks associated with QD emission are attributed to the ground and the first excited states transitions. The luminescence peak width is correlated with the distribution of QD diameters through the diameter dependent QD energy levels.

Original languageEnglish (US)
Article number055013
JournalSemiconductor Science and Technology
Volume32
Issue number5
DOIs
StatePublished - Apr 12 2017

Keywords

  • InAs quantum dots
  • intermediate-band solar cells
  • optical properties of quantum dots
  • size distribution of quantum dots

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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    Xie, H., Prioli, R., Torelly, G., Liu, H., Fischer, A. M., Jakomin, R., Mourão, R., Kawabata, R., Pires, M. P., Souza, P. L., & Ponce, F. (2017). Correlation between size distribution and luminescence properties of spool-shaped InAs quantum dots. Semiconductor Science and Technology, 32(5), [055013]. https://doi.org/10.1088/1361-6641/aa6471