ABSTRACT
Zinc oxide (ZnO), a II-VI compound semiconductor, has been in the focus of current research due to its size-and morphology-dependent electrical, optical, and chemical properties at the nanoscale. The thermodynamically stable phase of ZnO is the wurtzite hexagonal one with the lattice parameters a = 0.3249 and c = 0.5207 nm. This structure belongs to the point group 6mm and space group P63mc. Besides wurtzite ZnO, it can also exist in other crystalline phases, such as zinc blende (ZB)
2.1 Introduction ............................................................................................................................ 39 2.2 Growth of ZnO Nanostructures .............................................................................................. 41 2.3 Optical Properties of ZnO Tripods and Tetrapods ................................................................. 41
2.3.1 Undoped ZnO Tripods ................................................................................................ 42 2.3.2 Undoped ZnO Tetrapods ............................................................................................44 2.3.3 Sn-and P-Doped ZnO Tetrapods ................................................................................ 45 2.3.4 Mg-and Mn-Doped ZnO Tetrapods ........................................................................... 49
2.4 Electrical Properties of ZnO Tetrapods .................................................................................. 49 2.4.1 Undoped ZnO Tetrapods ............................................................................................ 49 2.4.2 Sn-Doped ZnO Tetrapods ...........................................................................................50
