Synthesis and wavelength-tunable luminescence property of wurtzite Zn xCd1-xS nstructures

Changqing Jin*, Wei Zhong, Xin Zhang, Yu Deng, Chak Tong AU, Youwei Du

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

High-quality nanostructured ZnxCd1-xS has been synthesized through a method of two-step thermal evaporation. The typical morphologies of the nanomaterials were investigated by SEM and TEM. The first step of synthesis is the preparation of ZnS nanoribbons. With ZnS nanoribbons being used as templates, a series of wurtzite ZnxCd1-xS (x = 0.47, 0.70, 0.77, 0.85, and 0.94) nanobelts can be produced. Furthermore, by adopting ZnS nanoribbons of a particular width, ZnxCd1-xS nanobelts of a desired width can be fabricated. In XRD analysis, we find that with an increase in Zn content (x), the peaks corresponding to the wurtzite structures shift to larger 26. As a deduction based on Vegard's law, the Zn xCd1-xS are solid solutions of similar crystal structure. The results of HRTEM and SAED investigations reveal that the ZnS nanoribbons and ZnxCd1-xS nanobelts grow along the (1010) direction. With an increase in Zn content, we observe a gradual blue shift of photoluminescence emission (from 443 to 352 nm), further indicating the homogeneity of the ZnxCd1-xS solid solutions. After proper thermal annealing, there is better crystallinity of ZnxCd1-xS and higher specificity of near-band emission.

Original languageEnglish
Pages (from-to)4602-4606
Number of pages5
JournalCrystal Growth and Design
Volume9
Issue number11
DOIs
Publication statusPublished - 4 Nov 2009

Scopus Subject Areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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