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Microwave-hydrothermal synthesis and photoluminescence characteristics of zinc oxide powders

机译:微波水热法合成氧化锌粉及其光致发光特性

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摘要

A microwave-hydrothermal process for the synthesis of crystalline zinc oxide powders has been developed in this study. Well-crystallized zinc oxide powders exhibiting different morphology, crystallinity, and particle size have been successfully prepared by controlling the process temperature and molarity of NH_4OH in the starting solution. With increasing process temperature and NH_4OH molarity during synthesis, the morphology of ZnO powders changes from flowerlike agglomeration to a well-developed rodlike shape. The band gap of ZnO powders increases with a decrease in the molarity of NH_4OH during synthesis. Vacuum ultraviolet radiation (VUV) excited luminescence studies for ZnO powders reveal an excitation band at 161 nm possibly due to the absorption of O~(2-) 2p electrons in the valence band. The VUV excitation band of ZnO powders observed at 161 nm will be useful for excitation of gas-discharged plasma display devices.
机译:这项研究开发了微波水热法合成结晶氧化锌粉末。通过控制起始溶液中NH_4OH的工艺温度和摩尔浓度,已成功制备了具有良好形态的结晶氧化锌粉末,这些粉末具有不同的形态,结晶度和粒径。随着合成过程中工艺温度的升高和NH_4OH摩尔浓度的增加,ZnO粉末的形态从花状团聚变为良好发展的棒状。合成过程中,ZnO粉末的带隙随着NH_4OH摩尔浓度的降低而增加。 ZnO粉末的真空紫外辐射(VUV)激发发光研究表明在161 nm处有一个激发带,这可能是由于价带中O〜(2-)2p电子的吸收所致。在161 nm处观察到的ZnO粉末的VUV激发带对于激发气体放电等离子体显示设备很有用。

著录项

  • 来源
    《Journal of Materials Research》 |2005年第2期|p.464-471|共8页
  • 作者单位

    Electronic and Electro-optical Ceramics Lab, Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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