Growth of ZnO by chemical vapor transport using CO₂ and Zn as a transport agent

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• 作者：Makoto Mikami ; Sang-Hwui Hong ; Takashi Sato ; Seishi Abe ; JiFeng Wang ; Katashi Masumoto ; Yoshihiko Masa ; Minoru Isshiki
• 关键词：A1. Mass transfer ; A2. Growth from vapor ; B1. Oxides ; B2. Semiconducting II– ; VI materials
• 刊名：Journal of Crystal Growth
• 出版年：2007
• 期刊代码：49_00220248
• 类别：ch
• 出版时间：1 June 2007
• 卷：304
• 期：1
• 页码：37-41
• 文件大小：480 K

摘要

ZnO crystal growth by chemical vapor transport (CVT) is carried out using CO₂ and Zn as a new transport agent. ZnO crystals are grown by the reaction: ZnO(s)+CO(g)=Zn(g)+CO₂(g). The increase in CO₂/Zn changes the color of as-grown crystals from red to transparent. The color change of the crystals is due to the oxygen partial pressure during the CVT. The red color of crystals is attributed to defects caused by the shift of stoichiometry to zinc-rich (oxygen vacancies, zinc interstitials, or their complexes are created). All of the grown crystals are polycrystals by using the ordinary CVT ampoules. Single crystals are grown reproducibly by using a seed and a CVT ampoule with modified configuration.