Green luminescent zinc oxide films prepared by polymer-assisted deposition with rapid thermal process

Structural and optical characterization of ZnO and AZO thin films: the influence of post-annealing

“…Moreover, the emission intensities of UV, violet, and blue of AZO annealed films increased and green emission was observed neither in ZnO nor AZO films. Temperature can stimulate the migration of grain boundaries and cause the coalescence of more grains during annealing processes [36] the grain size measured from AFM is the surface morphology of coalesced grains which gives the particle size. This also agrees with the results shown in XRD which confirms that crystalline size is increased.…”

Rapid thermal annealing effects on the structural and optical properties of ZnO films deposited on Si substrates

“…3, it is also observed that the grain boundaries were fewer and the grains grew much bigger with further increase of annealing time. Lin et al [22] described that high temperature can stimulate the migration of grain boundaries and cause the coalescence of more grains during the annealing processes. Fang et al [8] further indicated at high temperature, more energy should be available for the atoms to acquire so that they may diffuse and occupy the correct site in the crystal lattice and grains with lower surface energy will grow larger at high temperature.…”

Enhancement of ferromagnetism of ZnO:Co nanocrystals by post-annealing treatment: The role of oxygen interstitials and zinc vacancies

“…However, the origin of ferromagnetism and influence of zinc vacancies [6][7][8][9], oxygen vacancies [10][11][12][13], dopants and the interactions between them on magnetic properties of ZnO [14][15][16], especially Co-doped ZnO, are still not well understood. In order to investigate the defect dependent properties of Co-doped ZnO, in this work, Co-doped ZnO thin films were first grown on (0001) sapphire (Al 2 O 3 ) substrates by polymer assisted deposition (PAD) [17][18][19], and then some of them were annealed in H 2 (forming gas of 5% H 2 þ 95% Ar) or O 2 atmosphere. We then systemically investigated the structure and the magnetic properties of the Codoped ZnO thin films in three categories: as-grown, annealed in H 2 and annealed in O 2 .…”