Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1796509 | Journal of Crystal Growth | 2007 | 5 Pages |
Abstract
ZnO crystal growth by chemical vapor transport (CVT) is carried out using CO2CO2 and Zn as a new transport agent. ZnO crystals are grown by the reaction: ZnO(s)+CO(g)=Zn(g)+CO2(g)ZnO(s)+CO(g)=Zn(g)+CO2(g). The increase in CO2/ZnCO2/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.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Makoto Mikami, Sang-Hwui Hong, Takashi Sato, Seishi Abe, JiFeng Wang, Katashi Masumoto, Yoshihiko Masa, Minoru Isshiki,