A simple solution-phase approach to synthesize high quality ternary AgInSe2 and band gap tunable quaternary AgIn(S1-xSe x)2 nanocrystals
KAUST DepartmentImaging and Characterization Core Lab
Physical Sciences and Engineering (PSE) Division
Chemical Science Program
Advanced Nanofabrication, Imaging and Characterization Core Lab
Advanced Membranes and Porous Materials Research Center
Nanostructured Functional Materials (NFM) laboratory
Permanent link to this recordhttp://hdl.handle.net/10754/563204
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AbstractA facile solution-phase route for the preparation of AgInSe2 nanocrystals was developed by using silver nitrate, indium stearate, and oleylamine-selenium (OAm-Se) as precursors. The evolution process of the AgInSe2 nanocrystals is discussed in detail and different reaction conditions all have a great impact on the growth and morphology of the nanocrystals. Alloyed AgIn(S1-xSex)2 nanocrystals with controlled composition across the entire range (0 ≤ x ≤ 1) was also successfully prepared by modulating the S/Se reactant mole ratio. X-ray diffraction (XRD), energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) were used to confirm that the alloyed AgIn(S1-xSex)2 nanocrystals are homogeneous. The UV-vis absorption spectra revealed that the band gap energies of the alloyed AgIn(S1-xSex)2 nanocrystals could be continuously tuned by increasing the Se content. © The Royal Society of Chemistry 2014.
SponsorsThis work was supported by the Foundation of the Natural Science Foundation of China (no. 21371069 and 21301068), the Specialized Research Fund for the Doctoral Program of Higher Education (no. 20110061110015) and National High Technology Research and Development Program (863 program) of China (no. 2013AA031702) and the Special Program of China Post-doctoral Science Foundation (no. 2012T50288).
PublisherRoyal Society of Chemistry (RSC)