Elements Of X Ray Diffraction

Aluminium-doped zinc oxide (AZO)/fluorine-doped tin dioxide (FTO) double-layered transparent conducting films were manufactured on quartz glass substrates by spray pyrolysis. Like top films, AZO ha...

Anti-reductive properties of AZO/FTO bilayered transparent conducting films

Oxyapatite-containing glass ceramics coactivated with Ce3+and Yb3+ were prepared with reducing Al-powder. The precipitation of Ba4La6(SiO4)6O polycrystals exhibiting lattice contraction due to their preferential enrichment of rare earth ions was confirmed by crystallization and microstructural analysis. Upon 366 nm excitation, intense near infrared emission around 1 μm due to Yb3+: 2F5/2 → 2F7/2 transition was achieved in glasses and glass ceramics, indicating the occurrence of energy transfer from Ce3+ to Yb3+. The underlying mechanisms could be described as a single-step indirect process via intermediate Ce4+─Yb2+ charge transfer state, most likely involving Ce3+ ions on La3+ neighbor sites. An optimal enhancement as much as three folds in near infrared emission was obtained after crystallization, which probably resulted from the partition of Ce3+ and Yb3+ into crystals. The results show that glass ceramic may be a promising candidate applicable for the development of high-efficiency c-Si solar cells.

Enhanced broadband excitable near-infrared luminescence in Ce3+/Yb3+ codoped oxyapatite based glass ceramics

ZnO:Eu film has been deposited and grown on glass substrates by spin coating technique followed by water bath treatment. The precursors were synthesised by a sol–gel method and all of the f...

Optical properties of nanostructured ZnO:Eu film by sol–gel method

Influence of substrate temperature on the energy storage properties of bismuth magnesian niobium thin films prepared by magnetron sputtering

Transparent conducting oxide films of boron and gallium co-doped ZnO (BGZO) were prepared on glass substrates by radio frequency magnetron sputtering at room temperature and 200°C, respectively. The dependence of structural, electrical and optical properties on the thickness and substrate temperature were investigated. All films demonstrated c-axis preferred orientation and showed highly transparent in the visible wavelength region. With the increase thickness and substrate temperature, the grain size of BGZO films increased and the full width at half maximum decreased, the carrier mobility increased and resistivity decreased, which indicated that the crystallinity and conductivity of films were improved. The research also found that the optical band gap (Eg) of BGZO thin films decreased with increased substrate temperature and thickness.

Substrate temperature and thickness dependence of properties of boron and gallium co-doped ZnO films

All-solid-state lithium batteries consisting of LiPON thin films were prepared by radio-frequency (RF) magnetron sputtering, and the influences of substrates and RF sputtering times have been investigated. For the preparation with different substrates, the Cu, Mo, Al and FTO (SnO2: F) were chosen to grow LiPON films, respectively. The results indicate that the small particles of FTO-sub film can aggregate together and form the particles clusters, which contribute to a fairly rough surface and high discharge capacity of the lithium cell during the cycle test. For the preparation with different sputtering times, the 0.5, 1.0, 1.5 and 2.0 hours are taken to evaluate the characteristics and electrochemical properties of the films, respectively. The results show that long sputtering time (1.5 and 2.0 h) could prevent the formation of polycrystalline phases, which may increase the capacity of all-solid-state Li battery. [doi:10.2320/matertrans.M2017419]

Characterization of All Solid State Batteries with LiPON Thin Films Obtained with Different Substrates and RF Sputtering Times

We synthesize Ce3+-doped oxyfluoride glass ceramics (GCs) with different melting times employing the conventional melt-quenching method. We investigate the crystal structure and photoluminescence properties of Ce3+-doped GCs in detail in order to evaluate the effect of melting times on the downshifting properties. The photoluminescence properties revealed that the Ce3+ doped GCs have an intense emission band in the broad region from 480 to 600 nm under 427 nm excitation. We improve the energy-conversion efficiency of a-Si solar cells by 0.41%, from 5.02% to 5.43%, by incorporating the Ce3+-doped GCs with a melting time of 1.5 h. The above results indicate that Ce3+-doped GCs can be a promising candidate as downshifting materials for applications in a-Si solar cells.

Effect of Melting Times on the Down-Shifting Properties in Ce3+-Doped Oxyfluoride Glass Ceramics for a-Si Solar Cells

Effect of annealing temperatures on luminescence properties in Ce3+-Yb3+ codoped oxyﬂuoride glass-ceramics for solar cells

Although the sputtering processes had a definite advantage, few researches had been focused on the influence of heating temperature and sputtering time processes on the grain growth and adhesive properties of tantalum-molybdenum (Ta-Mo) high-temperature coatings. In this article the growth of Ta-Mo coatings at various heating processes (25, 150, 350, 450 and 550°C) and sputtering times (5, 10, 20, 30, 40 and 60 min) had been investigated. The result of structures indicated that heating temperature process could increase the critical grain size and change the grain shape while the sputtering time process could increase the grain grown velocity and density. In addition, the growth equation that related grain diameters with various processes was simulated. Finally, an inverse relationship between growth mechanism and adhesive property of the Ta-Mo coatings using the various processes was observed.

Linjun Wang

Papers

Substrate temperature and thickness dependence of properties of boron and gallium co-doped ZnO films

Characterization of All Solid State Batteries with LiPON Thin Films Obtained with Different Substrates and RF Sputtering Times

Effect of Melting Times on the Down-Shifting Properties in Ce3+-Doped Oxyfluoride Glass Ceramics for a-Si Solar Cells

Effect of annealing temperatures on luminescence properties in Ce3+-Yb3+ codoped oxyﬂuoride glass-ceramics for solar cells

Heating and Time Processes on Growth and Adhesive Property of Ta-Mo Coatings