Controlling structural and electronic properties of ZnO NPs: Density-functional tight-binding method

Authors : Mustafa KURBAN, Hasan KURBAN, Mehmet DALKILIÇ

Pages : 35-39

Doi:10.30516/bilgesci.647923

View : 27 | Download : 6

Publication Date : 2019-12-31

Article Type : Research Paper

Abstract :We carried out a thorough examination of the structural and electronic features of undoped and Nitrogen insert ignore into journalissuearticles values(N);-doped ZnO nanoparticles insert ignore into journalissuearticles values(NPs); by the density-functional tight-binding insert ignore into journalissuearticles values(DFTB); method. By increasing the percent of N atoms in undoped ZnO NPs, the number of bonds insert ignore into journalissuearticles values( n );, order parameter insert ignore into journalissuearticles values( R ); and radial distribution function insert ignore into journalissuearticles values(RDF); of two-body interactions such as Zn-Zn, N-N, O-O, N-O, etc. were investigated using novel algorithms. Our results show that the total n of Zn-Zn interactions is greater than that of Zn-Zn, N-N, N-O, and O-O; thus, it means that Zn atoms have a greater preference for N or O atoms. The RDFs of Zn and O atoms increase based on the increase in the content of N atoms. The R of Zn, O and N atoms demonstrate that O and N atoms tend to locate at the center, whereas Zn atoms tend to reside on the surface. T he density of state insert ignore into journalissuearticles values(DOS); indicates that the undoped and N-doped ZnO NPs demonstrate a semiconductor-like behavior that is coherent with measured data. The HOMO-LUMO energy gap decreases from -4.717 to -0.853 eV. n increase in the content of N atoms contributes to the destabilization of ZnO NPs due to a decrease in the energy gap.
Keywords : Nanoparticle, N doped ZnO, Electronic Structure, Data Science