Synthesis of Cu 2Zn xSn ySe 1+x+2y nanocrystals with wurtzite-derived structure

Xianzhong Lin, Jaison Kavalakkatt, Kai Kornhuber, Daniel Abou-Ras, Susan Schorr, Martha Ch Lux-Steiner, Ahmed Ennaoui

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The most reported stable crystal structure of Cu 2ZnSnS 4 and Cu 2ZnSnSe 4 (CZTSe) is kesterite, which is derived from the ternary chalcopyrite structure. However, by controlling the reaction conditions, we found that the structure and composition of the CZTSe nanocrystals (NCs) can be tuned. This can be achieved by using a simple hot injection approach. The structural properties of the CZTSe NCs were characterized by powder X-ray diffraction (PXRD), Raman spectroscopy and transmission electron microscopy. The energy dispersive X-ray spectroscopy confirms the stoichiometry of CZTSe NCs. The optical band gap of the NCs is found to be around 1.38 eV, as estimated from UV-Vis absorption spectroscopy. PXRD studies show that the obtained CZTSe NCs occurring in three structurally different phases (tetragonal kesterite type, hexagonal wurtzite type and orthorhombic wurtz-stannite type) are converted to the kesterite structure by annealing at 540 °C for 30 min under an Se-vapour atmosphere.

Original languageEnglish
Pages (from-to)9894-9898
Number of pages5
JournalRSC Advances
Volume2
Issue number26
DOIs
Publication statusPublished - 28 Oct 2012

    Fingerprint

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Lin, X., Kavalakkatt, J., Kornhuber, K., Abou-Ras, D., Schorr, S., Lux-Steiner, M. C., & Ennaoui, A. (2012). Synthesis of Cu 2Zn xSn ySe 1+x+2y nanocrystals with wurtzite-derived structure. RSC Advances, 2(26), 9894-9898. https://doi.org/10.1039/c2ra21293e