Broadband near-infrared to visible upconversion in quantum dot-quantum well heterostructures

Ayelet Teitelboim, Dan Oron

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Upconversion is a nonlinear process in which two, or more, long wavelength photons are converted to a shorter wavelength photon. It holds great promise for bioimaging, enabling spatially resolved imaging in a scattering specimen and for photovoltaic devices as a means to surpass the Shockley-Queisser efficiency limit. Here, we present dual near-infrared and visible emitting PbSe/CdSe/CdS nanocrystals able to upconvert a broad range of NIR wavelengths to visible emission at room temperature. The synthesis is a three-step process, which enables versatility and tunability of both the visible emission color and the NIR absorption edge. Using this method, one can achieve a range of desired upconverted emission peak positions with a suitable NIR band gap.

Original languageEnglish
Pages (from-to)446-452
Number of pages7
JournalACS Nano
Volume10
Issue number1
DOIs
Publication statusPublished - Jan 26 2016

Fingerprint

Semiconductor quantum wells
Semiconductor quantum dots
Heterojunctions
quantum dots
quantum wells
broadband
Infrared radiation
Wavelength
Photons
wavelengths
photons
versatility
Nanocrystals
nanocrystals
Energy gap
Scattering
Color
color
Imaging techniques
room temperature

Keywords

  • Interband absorption
  • Intraband absorption
  • Near-infrared
  • Quantum dot-quantum well
  • Semiconductor nanocrystals
  • Upconversion

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Broadband near-infrared to visible upconversion in quantum dot-quantum well heterostructures. / Teitelboim, Ayelet; Oron, Dan.

In: ACS Nano, Vol. 10, No. 1, 26.01.2016, p. 446-452.

Research output: Contribution to journalArticle

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