Annealing effect on structure and green emission of ZnO nanopowder by decomposing precursors
Zhong Hong-Mei(钟红梅)a)b)†, Liu Qian(刘茜)a), Sun Yan(孙艳)b), and Lu Wei(陆卫)b)
a State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences，Shanghai 200050, China; b National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
Abstract ZnO nanopowder is successfully synthesized by annealing the precursors in oxygen gas using the chemical precipitation method. Structural and optical properties of thus synthesized ZnO nanopowder are characterized by scanning electron microscopy (SEM) and photoluminescence (PL). The morphology of ZnO nanopowders evolves from nanorod to cobble as annealing temperature increases from 500 to 1000 ℃, while spiral structures are observed in the samples annealed at 900 and 1000 ℃. The PL spectra of ZnO nanopowder consist of largely green and yellow emission bands. The green emission from ZnO nanopowder depends strongly on the annealing temperature with a peak intensity at a temperature lower than 800 ℃ while the yellow emission is associated with interstitial oxygen Oi.
Received: 30 March 2009
Revised: 17 April 2009
Accepted manuscript online:
PACS:
81.40.Ef
(Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 70234040, 60476040
and 60576068) and the Shanghai Science and Technology Foundation,
China (Grant No 05DJ14003).
Cite this article:
Zhong Hong-Mei(钟红梅), Liu Qian(刘茜), Sun Yan(孙艳), and Lu Wei(陆卫) Annealing effect on structure and green emission of ZnO nanopowder by decomposing precursors 2009 Chin. Phys. B 18 5024
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