Stabilization of the Surface of ZnO Films and Elimination of the Aging Effect

Abstract

Zinc oxide is a promising multifunctional material. The practical use of nano- and polycrystalline ZnO devices faces a serious problem of instability of electrical and luminescent characteristics, due to the adsorption of oxygen by the surface during aging. In this paper, the aging effect in ZnO films and nanorod arrays was studied. It was found that ZnO samples demonstrate different behavior of the degradation process, which corresponds to at least two different types of adsorbing surface sites for O2, where O2 adsorption is of a different nature. The first type of surface sites is rapidly depassivated after hydrogen passivation and the aging effect takes place due to these centers. The second type of surface sites has a stable structure after hydrogen passivation and corresponds to HO–ZnO sites. The XPS components of these sites include the Zn2p3/2 peak at 1022.2 ± 0.2 eV and Zn2p1/2 peak at 1045.2 ± 0.2 eV, with a part of the XPS O1s peak at 531.5 ± 0.3 eV. The annealing transforms the first type of site into the second one, and the subsequent short-term plasma treatment in hydrogen results in steady passivation, where the degradation of characteristics is practically reduced to zero.

Flame-Retardant and Form-Stable Phase-Change Composites Based on Phytic Acid/ZnO-Decorated Surface-Carbonized Delignified Wood with Superior Solar-Thermal Conversion Efficiency and Improved Thermal Conductivity

“…Figure f illustrates the narrow scan of XPS spectra at Zn 2p 3/2 and Zn 2p 1/2 peaks for PZPCM-4 and PZPCM-9. Obviously, the Zn 2p 3/2 and Zn 2p 1/2 signals are identified at 1023 and 1046 eV, which are ascribed to the binding energy of Zn–O . The above results further confirmed that PA and ZnO successfully decorated the DW.…”

“…Considering the results of FTIR and XRD, n-docosane was successfully introduced into PZCDW without chemical reactions, which was favorable for the application of the alkanes as PCMs. 49 The above results further confirmed that PA and ZnO successfully decorated the DW.…”

Zn nutrients-loaded chitosan nanocomposites and their efficacy as nanopriming agents for maize (Zea mays) seeds

“…The high-resolution spectrum of O 1s was deconvoluted into three peaks at 528.3, 531.2, and 532.8 eV assigned to Zn–O, C–O, and C=O bonds, respectively ( Daniyal et al, 2021 ). The peaks at 133.6 and 1,022.0 eV are contributions by P 2p of phosphate ( Qiao et al, 2015 ) and Zn 2p 3/2 of Zn 2+ in the ZnO lattice, respectively ( Abdullin et al, 2021 ).…”

Construction of a ZnO Heterogeneous Structure Using Co3O4 as a Co-Catalyst to Enhance Photoelectrochemical Performance

“…The concentration of precursors in a solution is a key factor in the growth process, as it directly influences the size of the resulting crystals. In the case of ZnO nanorods, the size-dependent properties of these structures have garnered significant attention due to their relevance in various applications [ 34 , 35 , 36 ]. For example, Lestari et al showed that the structural and optical properties of ZnO nanorods varied with precursor concentration (0.002, 0.06, and 0.1 M) [ 37 ].…”