Band-Gap States of AgIn5S8 and ZnS-AgIn5S8 Nanoparticles

Seonghyun Jeong, Hee Chang Yoon, Noh Soo Han, Ji Hye Oh, Seung Min Park, Byoung Koun Min, Young Rag Do, Jae Kyu Song

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

The size-dependent band-gap energies of AgIn5S8 nanoparticles were directly measured for the first time using absorption and photoluminescence spectroscopies, which enabled an explanation of the evolution of the band-gap energy with the quantum-confinement effect in AgIn5S8 nanoparticles. The band-gap transition in steady-state and time-resolved photoluminescence spectra indicated that the stable structure of the AgIn5S8 nanoparticles was the cubic phase. The electronic band structures of the Ag-In-S nanoparticles were mainly related to the crystal structures, although the stoichiometry affected the band energies to some extent. Zn doping led to the formation of a ZnS-AgIn5S8 solid solution, as supported by the significant changes in the electronic band structures of the AgIn5S8 nanoparticles. Controlling the size and stoichiometry allowed the emission of the Ag-In-S nanoparticles to be tuned in the entire visible regime.

Original languageEnglish
Pages (from-to)3149-3155
Number of pages7
JournalJournal of Physical Chemistry C
Volume121
Issue number5
DOIs
Publication statusPublished - 2017 Feb 9

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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