Details

Autor(en) / Beteiligte

• Yang, Jinghai
• Wang, Rui
• Yang, Lili
• Lang, Jihui
• Wei, Maobin
• Gao, Ming
• Liu, Xiaoyan
• Cao, Jian
• Li, Xue
• Yang, Nannan

Titel

Tunable deep-level emission in ZnO nanoparticles via yttrium doping

Ist Teil von

• Journal of alloys and compounds, 2011-02, Vol.509 (8), p.3606-3612

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2011

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• ▶ Photoluminescent properties of Zn1−xYxO nanoparticles depend on the Y-doping concentration. ▶ With increasing Y-doping concentration, the UV emission intensity can be strongly enhanced. ▶ With increasing Y-doping concentration, the peak position with maximum intensity in deep-level emission band can be gradually tuned from 539nm to 598nm since the Y doping has redistributed the defects in the Zn1−xYxO nanoparticles. Yttrium-doped ZnO nanoparticles (Zn1−xYxO, x=0, 0.03, 0.05) were synthesized by sol–gel technique. The effects of yttrium doping concentration on the structures, morphologies and optical properties of as-synthesized Zn1−xYxO nanoparticles were investigated in detail. The results from structural characterizations clearly demonstrated that yttrium ions were successfully doped into the crystal lattice of ZnO matrix. Besides a UV emission centered at ∼383nm, the PL spectra of all the samples exhibited a broad deep-level emission, which can be deconvoluted into two Gauss peaks centered at 539nm (P1) and 598nm (P2), respectively. As the concentration of Y doping increased from 0% to 5%, the peak position with maximum intensity in deep-level emission band was gradually tuned from 539nm to 598nm and the relative intensity ratio of IP1/IP2 also decreased step by step, which revealed a unique optical property of yttrium-doped ZnO nanoparticles.