Spatial composition grading of quaternary ZnCdSSe alloy nanowires with tunable light emission between 350 and 710 nm on a single substrate

Anlian Pan, Ruibin Liu, Minghua Sun, Cun-Zheng Ning

Research output: Contribution to journalArticlepeer-review

118 Scopus citations

Abstract

We demonstrated a general methodology of growing spatially composition-controlled alloys by combining spatial source reagent gradient with a temperature gradient. Using this dual gradient method, we achieved for the first time a continuous spatial composition grading of single-crystal quaternary ZnxCd1-xSySe1-y alloy nanowires over the complete band gap range along the length of a substrate. The band gap grading spans between 3.55 eV (ZnS) and 1.75 eV (CdSe) on a single substrate, with the corresponding light emission over the entire visible spectrum. We also showed that the dual gradient method can be extended to achieve alloy composition control in two spatial dimensions. The unique material platform achieved will open a wide range of applications from color engineered display and lighting, full spectrum solar cells, multispectral detectors, or spectrometer on-a-chip to superbroadly tunable nanolasers. The growth methodology can be extended more generally to other alloy systems.

Original languageEnglish (US)
Pages (from-to)671-680
Number of pages10
JournalACS nano
Volume4
Issue number2
DOIs
StatePublished - Feb 23 2010

Keywords

  • Composition grading
  • Dual gradient method
  • Nanowires
  • Quaternary alloys
  • Semiconductor
  • Single substrate
  • Tunable
  • Visible spectrum

ASJC Scopus subject areas

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

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