Raman scattering and band-gap variations of Al-doped ZnO nanoparticles synthesized by a chemical colloid process

Shih Shou Lo, Dison Huang, Chun Hsiang Tu, Chia Hung Hou, Chii Chang Chen

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59 Scopus citations

Abstract

This study synthesizes Al-doped ZnO (AZO) nanoparticles using a chemical colloid process. Raman scattering analysis shows that Al doping increases the lattice defects and induces Raman vibration modes of 651 cm-1. The Raman shift of the active mode E2 (high) of AZO nanoparticles shows the presence and increase in the stress in nanoparticles when the Al dopant concentration increases. Room-temperature photoluminescence (RT-PL) spectra of synthesized AZO nanoparticles exhibit strong UV emissions near the band edges. The RT-PL peak shifts to a higher photon energy region as the Al concentration increases, indicating a broadening of the band gap.

Original languageEnglish
Article number095420
JournalJournal of Physics D: Applied Physics
Volume42
Issue number9
DOIs
StatePublished - 7 May 2009

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