Surface and defect modifications in mixture of ZnO and carbon nanocrystals at mechanical processing

Study on the Defect Structure of Carbon‐Doped ZnO Materials

“…The fitting peak at the wavelength of 371 nm is the relatively weak UV emission band of ZnO after doping, which is caused by the exciton recombination caused by the radiation between the CB and the VB of ZnO. [27] This is consistent with the mechanism of pure ZnO. The fitting peak at 396 nm in the blue-violet emission band is caused by zinc vacancy defects and VB hole defects in interstitial zinc (Zn i ).…”

“…The sub-peak of the blue-green emission band at 421 nm is mainly related to the existence of a large number of oxygen vacancy (V O ) defects, which is the same as pure ZnO. [27,29] The sub-peak at 459 nm and the fitted peak at 496 nm are related to the deep double ionized oxygen vacancies (V O ) in the ZnO lattice, especially the extended oxygen vacancies. The relevant explanation here is consistent with pure ZnO.…”

“…[ 26 ] The position of the sub‐peak at 507 nm (yellow‐green emission band) and at 556 nm (yellow emission band) are related to the oxygen vacancy (V O ) of the deep level in ZnO. [ 27 ] During the formation of oxygen vacancies, free electrons are generated. The oxygen vacancies in these two places involve the related reaction between oxygen vacancies and free electrons.…”