Visible emission from Ce-doped ZnO nanorods grown by hydrothermal method without a post thermal annealing process

Abstract

Visible light-emitting Ce-doped ZnO nanorods [NRs] without a post thermal annealing process were grown by hydrothermal method on a Si (100) substrate at a low temperature of 90°C. The structural investigations of Ce-doped ZnO NRs showed that the Ce3+ ions were successfully incorporated into the ZnO lattice sites without forming unwanted Ce-related compounds or precipitates. The optical investigation by photoluminescence spectra shows that the doped Ce3+ ions in the ZnO NRs act as an efficient luminescence center at 540 nm which corresponds to the optical transition of 5d → 4f orbitals in the Ce3+ ions. The photoluminescence intensity of the Ce-doped ZnO NRs increased with the increasing content of the Ce-doping agent because the energy transfer of the excited electrons in ZnO to the Ce3+ ions would be enhanced by increased Ce3+ ions.

Structural, Morphological, Optical, and Room Temperature Magnetic Characterization on Pure and Sm-Doped ZnO Nanoparticles

“…Among the II-VI semiconductors, zinc oxide (ZnO) is very promising due to its essential uses in many research domains. ZnO semiconductor exhibits electronic properties as large exciton binding energy of 60 meV with direct band gap of 3.37 eV [5,6]. It is nontoxic, cheap, biosafe, and biocompatible [7].…”

Synthesis of Fibrous-Like Stripes ZnO: Ce Nano Structures for NO2 and NH3 Sensing

“…This can be explained because as ionic radii of Ce⁺³are 0.092 nm which are larger than that of Zn⁺² ion of 0.074 nm, therefore, it is difficult for Ce⁺³ to enter the crystalline lattice of ZnO to substitute Zn⁺². The Ce⁺³ions seem more likely to form complex with the surface oxygen of ZnO, which decreases the growth of ZnO crystallite [14,15]. The results in Figure 2(a) show that the nanoparticals and a smooth grains to be formed.…”

Photocatalytic degradation of endocrine disruptor Bisphenol-A in the presence of prepared CexZn1−xO nanocomposites under irradiation of sunlight

“…Sunlight is an abundantly available natural energy source, which can be utilized for irradiation (Nagaraja et al, 2012). Although cerium-doped TiO 2 or CeO 2 /TiO 2 composites have been reported in literature (Lamrani et al, 2007;Jung et al, 2012), Ce-doped ZnO nanocomposites' synthesis by co-precipitation method employed in this study, is a potential new approach for the development of an efficient photocatalyst for BPA degradation under sunlight irradiation.…”

“…CeO 2 has a band gap of about 3 eV and may be an ideal material for visible light-emitting phosphors in display, high-power laser, and light-emitting diode (Lang et al, 2010;Jung et al, 2012). Sunlight is an abundantly available natural energy source, which can be utilized for irradiation (Nagaraja et al, 2012).…”