Please use this identifier to cite or link to this item:
|Title:||Interplay of Cu and oxygen vacancy in optical transitions and screening of excitons in ZnO:Cu films|
Seng Herng, T.
|Citation:||Darma, Y., Seng Herng, T., Marlina, R., Fauziah, R., Ding, J., Rusydi, A. (2014). Interplay of Cu and oxygen vacancy in optical transitions and screening of excitons in ZnO:Cu films. Applied Physics Letters 104 (8) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4866029|
|Abstract:||We study room temperature optics and electronic structures of ZnO:Cu films as a function of Cu concentration using a combination of spectroscopic ellipsometry, photoluminescence, and ultraviolet-visible absorption spectroscopy. Mid-gap optical states, interband transitions, and excitons are observed and distinguishable. We argue that the mid-gap states are originated from interactions of Cu and oxygen vacancy (Vo). They are located below conduction band (Zn4s) and above valence band (O2p) promoting strong green emission and narrowing optical band gap. Excitonic states are screened and its intensities decrease upon Cu doping. Our results show the importance of Cu and Vo driving the electronic structures and optical transitions in ZnO:Cu films. © 2014 AIP Publishing LLC.|
|Source Title:||Applied Physics Letters|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 18, 2018
WEB OF SCIENCETM
checked on Jul 11, 2018
checked on Aug 3, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.