A simple solution-phase approach to synthesize high quality ternary AgInSe2 and band gap tunable quaternary AgIn(S1-xSe x)2 nanocrystals

Tianyu Bai, Chunguang Li, Feifei Li, Lan Zhao, Zhaorui Wang, He Huang, Cailing Chen, Yu Han, Zhan Shi, Shouhua Feng

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

A 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.
Original languageEnglish (US)
Pages (from-to)6782
JournalNanoscale
Volume6
Issue number12
DOIs
StatePublished - 2014

ASJC Scopus subject areas

  • Materials Science(all)

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