This study examined the effect of Al incorporation on the growth behavior of TiO2 thin films deposited by atomic layer deposition (ALD) using Al(CH3)3, and Ti(O-i-C3H7)4 as the precursors and O3 as the reactant. Al-doped TiO2 thin films were deposited at a growth temperature of 250 °C, which was within the ALD window for both precursors. Despite the discrete feeding of the Al precursor, Al ions easily diffused along the direction normal to the film surface forming a uniform Al-doped thin film, even during film growth. The Al concentration in the films increased with increasing Al precursor feeding ratio. However, the adsorption of the Ti precursor on the growing surface became less active after the incorporation of Al. Therefore, the growth rate of the Al-doped TiO2 films decreased with increasing Al precursor feeding ratio because of the retarded chemisorption of the Ti precursor onto the Al−O and Al containing Ti−O surface. In contrast to the retarded adsorption of the Ti precursor on the Al−O surface, the adsorption of the Al precursor on the Ti−O surface was enhanced by ∼60% compared with that on the Al−O surface.
Here, this study successfully fabricates few-layer MoS nanosheets from (NH ) MoS and applies them as the hole transport layer as well as the template for highly polarized organic light-emitting diodes (OLEDs). The obtained material consists of polycrystalline MoS nanosheets with thicknesses of 2 nm. The MoS nanosheets are patterned by rubbing/ion-beam treatment. The Raman spectra shows that {poly(9,9-dioctylfluorene-alt-benzothiadiazole), poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)]} (F8BT) on patterned MoS exhibits distinctive polarization behavior. It is discovered that patterned MoS not only improves the device efficiency but also changes the polarization behavior of the devices owing to the alignment of F8BT. This work demonstrates a highly efficient polarized OLED with a polarization ratio of 62.5:1 in the emission spectrum (166.7:1 at the peak intensity of 540 nm), which meets the manufacturing requirement. In addition, the use of patterned MoS nanosheets not only tunes the polarization of the OLEDs but also dramatically improves the device performance as compared with that of devices using untreated MoS .
This research demonstrates the design and development of a novel SnS2 nano-lotus structure (NLS) using a one-step eco-friendly solvothermal method to detect volatile organic compounds (VOCs) featured by a 3-S...
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