Abstract

We report a simple, fast and green phosphine-free colloidal chemistry to synthesize high-quality wurtzite-type Mn-doped ZnS quantum rods (QRs) with tunable diameters (1.6-5.6 nm), high aspect ratios (up to 50), variable Mn doping levels (0.18-1.60%), and high quantum yields (up to 45%). The electron paramagnetic resonance spectra with modeling reveal the successful doping of paramagnetic Mn 2+ ions in the host ZnS QRs. The Mn-doped ZnS QRs demonstrate tunable dual-color (orange and blue) emissions by tuning the doping levels and UV excitation wavelengths. The orange emission with long decay lifetime (3.3 ms) originates from the doped Mn 2+ states, while the blue emission with fast decay lifetime (0.31 ns) is attributed to the QR surface states. The bright two- and three-photon excitation upconversion luminescence from the Mn-doped ZnS QRs have been observed using tunable near-infrared femtosecond laser. Our strategy provides a versatile route to programmably control the optical properties of anisotropic semiconductor nanomaterials, which may create new opportunities for photonic devices and bioimaging applications.(Figure Presented)

Original languageEnglish (US)
Pages (from-to)5389-5396
Number of pages8
JournalJournal of the American Chemical Society
Volume133
Issue number14
DOIs
StatePublished - Apr 13 2011

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Zinc sulfide
phosphine
Manganese
Photons
Color
Doping (additives)
Optics and Photonics
Semiconductors
Nanostructures
Electron Spin Resonance Spectroscopy
Luminescence
Photonic devices
Lasers
Surface states
Quantum yield
Ions
Ultrashort pulses
Nanostructured materials
Equipment and Supplies
Paramagnetic resonance

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

High-quality manganese-doped zinc sulfide quantum rods with tunable dual-color and multiphoton emissions. / Deng, Zhengtao; Tong, Ling; Flores, Marco; Lin, Su; Cheng, Ji Xin; Yan, Hao; Liu, Yan.

In: Journal of the American Chemical Society, Vol. 133, No. 14, 13.04.2011, p. 5389-5396.

Research output: Contribution to journalArticle

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AU - Yan, Hao

AU - Liu, Yan

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