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2018 Vol.28, Issue 10 Preview Page
Morphological Change and Luminescence Properties of ZnO Crystals Synthesized by Thermal Evaporation of a Mixture of Zn and Cu Powder

Zn과 Cu 혼합 분말의 열 증발에 의하여 생성된 ZnO 결정의 형상 변화 및 발광 특성

Geun-Hyoung Lee†
이 근형†
Electrical & Electronic Materials Engineering Major, Division of Advanced Materials Engineering, Dong-eui University, 176 Eomgwangno, Busanjin-gu, Busan 47340, Republic of Korea
동의대학교 신소재공학부 전기전자소재공학전공
†Corresponding author E-Mail : ghl@deu.ac.kr (G.-H. Lee, Dong-eui Univ.)
October 2018. pp. 578-582
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Abstract

ZnO crystals with different morphologies are synthesized through thermal evaporation of the mixture of Zn and Cu powder in air at atmospheric pressure. ZnO crystals with wire shape are synthesized when the process is performed at 1,000 °C, while tetrapod-shaped ZnO crystals begin to form at 1,100 °C The wire-shaped ZnO crystals form even at 1,000 °C, indicating that Cu acts as a reducing agent. As the temperature increases to 1,200 °C, a large quantity of tetrapod-shaped ZnO crystals form and their size also increases. In addition to the tetrapods, rod-shaped ZnO crystals are observed. The atomic ratio of Zn and O in the ZnO crystals is approximately 1:1 with an increasing process temperature from 1,000 °C to 1,200 °C For the ZnO crystals synthesized at 1,000 °C, no luminescence spectrum is observed. A weak visible luminescence is detected for the ZnO crystals prepared at 1,100 °C Ultraviolet and visible luminescence peaks with strong intensities are observed in the luminescence spectrum of the ZnO crystals formed at 1,200 °C

Keywords
zinc oxide crystals
mixture of Zn and Cu
thermal evaporation
morphology change
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 28
  • No :10
  • Pages :578-582
  • Received Date : 2018-07-11
  • Revised Date : 2018-09-12
  • Accepted Date : 2018-09-13
  • DOI :https://doi.org/10.3740/MRSK.2018.28.10.578
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