Structural and optical properties of ZnO nanorods grown by metal organic chemical vapor deposition

Effect of NaOH molar concentration on optical and ferroelectric properties of ZnO nanostructures

“…According to the selection rules of phonon resonance modes, Raman-active modes of the wurtzite crystal structure of ZnO are Ѓ opt = A 1 + 2B 1 +E 1 +2E 2 [54][55]. corresponding to the E 2 H mode, which is the main characteristic peak of Raman mode in the wurtzite crystal structure [56] and confirms that all synthesized samples have a hexagonal wurtzite phase. However, the E 1 (LO) mode in Raman spectra is absent in all the synthesized samples, which arises due to the defects and impurities of the synthesized products.…”

Low-Temperature Vapor-Solid Growth of ZnO Nanowhiskers for Electron Field Emission

“…A raised higher gas flow will transports a higher amount of vaporized precursor, which enhances the probability of nucleation and thus, growth at lower temperatures. Lastly, by changing the precursor combination to the more reactive diethylzinc and oxygen, one can lower the growth temperatures to around 300 • C as shown in a metal organic chemical vapor deposition (MOCVD) process [45].…”

“…Note, the local electric field at the tip of an emitter can be in orders of magnitudes higher than the externally applied electric field, because of the geometrical field enhancement effect, which strongly depends on the emitters' shape. Linearization of the experimental data according to the Fowler-Nordheim (FN) theory for electron field emission permits the extraction of physical properties of the emitter [45]. By taking a work function of 5.3 eV for ZnO into account [46], the field enhancement factors-describing the ratio between the macroscopic applied electric field and the actual electric field at the surface of the emitter-have been derived for the ZnO nanowhiskers grown on different substrate types (Figure 11b).…”

“…Offset and slope-caused by the transimpedance amplifier and the ohmic resistance of the plate-capacitor like measurement assembly, respectively-have already been subtracted from the data. (b) FN theory was used to derive γ from the linearized experimental data [45] and the errors were calculated from the standard deviations of the linear fits.…”

Carbon Nano‐Onion and Zinc Oxide Composites as an Electron Transport Layer in Inverted Organic Solar Cells

“…[52][53][54] The E 2 high mode is characteristic of the wurtzite phase of ZnO. [55] The E 2 mode consists of two modes of low-and high-frequency phonons (E 2 l°w , E 2 high ), which correspond to the vibration of the heavy zinc sublattice and oxygen atoms, respectively. [56] The peak positioned ca.…”