中国物理B ›› 2009, Vol. 18 ›› Issue (11): 5024-5028.doi: 10.1088/1674-1056/18/11/068

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Annealing effect on structure and green emission of ZnO nanopowder by decomposing precursors

孙艳1, 陆卫1, 刘茜2, 钟红梅3   

  1. (1)National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China; (2)State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences，Shanghai 200050, China; (3)State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences，Shanghai 200050, China;National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese
  • 收稿日期:2009-03-30 修回日期:2009-04-17 出版日期:2009-11-20 发布日期:2009-11-20
  • 基金资助:
    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).

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)   

  1. 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
  • Received:2009-03-30 Revised:2009-04-17 Online:2009-11-20 Published:2009-11-20
  • Supported by:
    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).

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摘要： 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~\du, while spiral structures are observed in the samples annealed at 900 and 1000~\du. 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 \rm O_\i.

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.

Key words: ZnO, nanopowder, annealing effect, green emission

中图分类号:  (Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)

  • 81.40.Ef
78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures) 68.37.Hk (Scanning electron microscopy (SEM) (including EBIC)) 78.55.Et (II-VI semiconductors) 61.46.-w (Structure of nanoscale materials) 61.72.J- (Point defects and defect clusters)