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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Synthesis of Cu 2Zn xSn ySe 1+x+2y nanocrystals with wurtzite-derived structure
RSC Advances, Volume 2, No. 26, Year 2012
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Description
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. © 2012 The Royal Society of Chemistry.
Authors & Co-Authors
Lin, Xianzhong
Germany, Berlin
Helmholtz-zentrum Berlin Für Materialien Und Energie Hzb
Kavalakkatt, Jaison
Germany, Berlin
Helmholtz-zentrum Berlin Für Materialien Und Energie Hzb
Abou-Ras, Daniel
Germany, Berlin
Helmholtz-zentrum Berlin Für Materialien Und Energie Hzb
Schorr, Susan
Germany, Berlin
Helmholtz-zentrum Berlin Für Materialien Und Energie Hzb
Lux Steiner, Martha Ch H.
Germany, Berlin
Helmholtz-zentrum Berlin Für Materialien Und Energie Hzb
Ennaoui, Ahmed
Germany, Berlin
Helmholtz-zentrum Berlin Für Materialien Und Energie Hzb
Statistics
Citations: 36
Authors: 6
Affiliations: 1
Identifiers
Doi:
10.1039/c2ra21293e
ISSN:
20462069