High-quality manganese-doped zinc sulfide quantum rods with tunable dual-color and multiphoton emissions

Zhengtao Deng, Ling Tong, Marco Flores, Su Lin, Ji Xin Cheng, Hao Yan, Yan Liu

Research output: Contribution to journalArticle

111 Scopus citations

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

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'High-quality manganese-doped zinc sulfide quantum rods with tunable dual-color and multiphoton emissions'. Together they form a unique fingerprint.

  • Cite this