About the origin of center responsible for Cu-related blue emission band in ZnS:Cu

作者：Markevich I; Zhuk A; Stara T; Bacherikov Yu; Korsunska N^*

来源：Journal of Luminescence, 2014, 145: 71-73.

DOI：10.1016/j.jlumin.2013.07.024

• ZnS:Cu
• Luminescence
• Electrodiffusion

To choose among proposed in the literature models of the center responsible for Cu- related blue emission in ZnS:Cu (B-center), the technique of defect drift in external electric field was used. Doped with Cu zinc sulfide single crystals were investigated. After the action of direct electric field of (4-5) 10(2) V/cm at 300 degrees C blue emission was found to enhance near the cathode and to weaken near the anode. This effect was accounted for by the appearance of Cu-i(+) ions due to dissociation of B-centers, following drift of these ions to the cathode and formation of additional B-centers in near cathode region. It was concluded that B-centers are close donor-acceptor pairs consisting of Cu-zn acceptors and Cu-i donors.

• 出版日期2014-1