scholarly journals High-Performance Solution-Processed Amorphous InGaZnO Thin Film Transistors with a Metal–Organic Decomposition Method

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Yingtao Xie ◽  
Dongping Wang ◽  
Hon Hang Fong
Keyword(s):  
High Performance ◽  
Annealing Temperature ◽  
Solution Process ◽  
Molar Ratio ◽  
Molar Ratios ◽  
Positive Voltage ◽  
Metal Organic ◽  
The Relationship ◽  
Organic Decomposition ◽  
Igzo Tft

A facile solution process was introduced for the preparation of IGZO thin films via a metal–organic decomposition (MOD) method. The IGZO ink was synthesized by mixing the solutions of gallium acetylacetonate [Ga(C5H7O2)3], zinc acetylacetonate hydrate [Zn(C5H7O2)2·xH2O] dissolved in ethanol, and indium acetylacetonate [In(C5H7O2)3] dissolved in tetrahydrofuran (THF). The deposited films by spin-coating were annealed at moderate process temperature (≤500°C). The relationship between device performance and postannealing temperature was studied. The result demonstrated that mobility of IGZO TFT increased as the annealing temperature increased. Based on the analysis of O 1s statement, the annealing temperature can influence the number of oxygen vacancy to further affect the carrier centration. In addition, the IGZO TFT devices with various Ga molar ratios were compared to demonstrate the influence of the Ga addition. The result demonstrated that the saturated mobilities (μe) decreased and VTH shifted to positive voltage as the Ga molar ratio was increased. It is likely that Ga can offer stronger chemical bonds between metal and oxygen that reduced the concentration of free carriers and thus help reducing VTH. As a result, the optimized performance of IGZO TFT with the mobility of 3.4 cm2V−1s−1 showed the MOD process was a promising approach.

Performance modification in solution-processed SnZnO thin film transistor

2010 ◽  
Vol 1247 ◽  
Author(s):  
Dong Lim Kim ◽  
Doo Na Kim ◽  
You Seung Rim ◽  
Si Joon Kim ◽  
Hyun Jae Kim
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
Thin Film Transistors ◽  
High Performance ◽  
Annealing Temperature ◽  
Thin Film Transistor ◽  
Solution Process ◽  
Molar Ratio ◽  
Electrical Characteristics ◽  
Solution Processed

AbstractTin zinc oxide (SnZnO) thin film transistors (TFTs) with different component fraction fabricated by solution process were reported. Sn chloride and Zn acetate were used as precursor and the maximum annealing temperature was 500°C. The electrical characteristics of TFTs were acutely affected by the molar ratio between Sn and Zn in the lattice, and showed the highest mobility and on-to-off ratio of about 17 cm2/Vs and 2×106, respectively. The origins of the high performance were traced through both structural and electrical aspects. Sn was generally considered to offer carrier path by superposition of s orbital, but it was found that the increase of Sn fraction only below specific value in lattice contributed to increase mobility, which could be explained by the structural distortion and the defect generation. Zn atoms introduced in the lattice were necessary to control both mobility and carrier concentration. From these results, the solution-processed SnZnO TFT with high performance was suggested.

Evaluating the potential of different carbon sources to promote denitrification

2020 ◽  
Vol 158 (3) ◽  
pp. 194-205
Author(s):  
J. C. Dlamini ◽  
D. Chadwick ◽  
J. M. B. Hawkins ◽  
J. Martinez ◽  
D. Scholefield ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Carbon Sources ◽  
Organic Soil ◽  
Mitigation Strategies ◽  
Molar Ratio ◽  
Pig Slurry ◽  
Molar Ratios ◽  
Organic Soil Amendments ◽  
The Relationship ◽  
Denitrification Process

AbstractOrganic carbon (C) plays an essential role in the denitrification process as it supplies energy for N2O, N2 and CO2 producing reactions. The objectives of this study were to: (i) rank the reactivity of different C compounds found in manures based on their availability for denitrification and (ii) explore C-quality in different C sources based on their capacity to promote denitrification. Evaluation of different C-sources in promoting denitrification was conducted based on the molar ratio of CO2 production to NO3− reduction after incubation. Results of the first experiment (a 12-day investigation) showed that glucose and glucosamine were highly reactive C compounds with all applied NO3− being exhausted by day 3, and glucosamine had significantly high amount of NH4+-N present at end of the experiment. The glucose and glucosamine treatments resulted in significantly greater cumulative CO2 production, compared to the other treatments. In the second experiment (a 9-day investigation), all NO3− had been depleted by day 6 and 9 from acetic acid and glucose, respectively, and the greatest cumulative CO2 production was from acetic acid. The CO2 appearance to NO3− molar ratios revealed that glucose and glucosamine were compounds with highly available C in the first experiment. In the second experiment, the pig slurry and acetic acid were found to be C-sources that promoted potential denitrification. The application of slurry to soil results in the promotion of denitrification and this depends on the availability of the C compounds it contains. Understanding the relationship between C availability and denitrification potential is useful for developing denitrification mitigation strategies for organic soil amendments.

Structural and optical characterization of BaTiO3 thin films prepared by metal-organic deposition from barium 2-ethylhexanoate and titanium dimethoxy dineodecanoate

1994 ◽  
Vol 9 (4) ◽  
pp. 970-979 ◽  
Author(s):  
W. Ousi-Benomar ◽  
S.S. Xue ◽  
R.A. Lessard ◽  
A. Singh ◽  
Z. L. Wu ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Solid State ◽  
Annealing Temperature ◽  
Barium Carbonate ◽  
Optical Characterization ◽  
Characterization Methods ◽  
Metal Organic ◽  
Metal Organic Deposition ◽  
The Relationship

Single phase BaTi03 thin films were prepared by metal-organic deposition (MOD) using barium 2-ethylhexanoate and titanium dimethoxy dineodecanoate as the metal-organic precursors. A series of experiments was conducted on the metal-organic spin-coated films and their correspondingly annealed samples by employing experimental techniques ranging from thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), and scanning electron microscopy (SEM), to various optical property characterization methods. A better understanding has been achieved regarding the metal-organic decomposition mechanism, the solid-state BaTi03 film formation and crystallization process, as well as the relationship between the structure and the optical properties of the prepared films. The conclusions of our experiments are as follows: Upon annealing the barium 2-ethylhexanoate spin-coated films, barium carbonate (BaC03) is formed at a relatively low temperature of 300 °C, and at an annealing temperature around 700 °C forms the barium peroxymonocarbonate (BaCO4). Upon annealing the titanium dimethoxy dineodecanoate spin-coated films, anatase is first formed at a low annealing temperature about 400 °C and transforms to rutile phase around an annealing temperature of 800 °C. Upon annealing the spin-coated films from the equimolar mixture of barium 2-ethylhexanoate and titanium dimethoxy dineodecanoate formulations, BaTi03 is formed around an annealing temperature of 600 °C via solid-state reaction between BaCO3 and TiO2 (anatase). The structure of MOD prepared BaTiO3 films has several specific features: instead of the columnar structure in physical vapor deposited (PVD) films, the crystal grains in granular shape are characteristic of MOD films, and the crystallites are much larger near the surface of the film than near the substrates. Optical properties of the prepared BaTi03 films have been reported. Optical characterization shows that the scattering losses contribute dominantly to the total optical losses. The relationship between the structure and the optical properties of the prepared films has also been discussed.

scholarly journals Deoxyribonucleic acid and polyamine synthesis in rat ventral prostate. Effects of age of the intact rat and androgen stimulation of the castrated rat with testosterone, 5α-dihydrotestosterone and 5α-androstane-3β, 17β-diol

1977 ◽  
Vol 162 (1) ◽  
pp. 87-97 ◽  
Author(s):  
E E K Takyi ◽  
D J M Fuller ◽  
L J Donaldson ◽  
G H Thomas
Keyword(s):  
Ornithine Decarboxylase ◽  
Ventral Prostate ◽  
Molar Ratio ◽  
Synthetic Activity ◽  
Decarboxylase Activity ◽  
Polyamine Synthesis ◽  
Molar Ratios ◽  
Ornithine Decarboxylase Activity ◽  
The Relationship

The relationship between polyamine synthesis, growth and secretion in vivo was examined in ventral prostates from: (a) intact rats aged 3-60 weeks; (b) animals castrated for 7 days before injection with 5 alpha-dihydrotestosterone (17 beta-hydroxy-5-alpha-androstan-3-one), testosterone and 5 alpha-androstane-3 beta, 17 beta-diol for up to 10 days; (c) rats injected with the 3 beta, 17 beta-diol immediately after castration. Ornithine decarboxylase activity and the concentrations of putrescine, spermidine and spermine were measured. DNA-synthetic activity was monitored by measuring [125I]iododoxyuridine incorporation. An enhanced spermidine/spermine molar ratio reflected increased activity of the prostate. The ratio was higher (greater than 2) in prostates from sexually immature animals, than in the intact adult (1.5), suggesting that the ratio was indicative of the proliferative activity of the tissue. However, in the androgen-stimulated castrated rat, enhanced spermidine/spermine ratios tended to correlate with hypertrophy and secretion. In both sets of experiments there was a linear relationship between protein and spermidine content. High spermidine/spermine molar ratios were the consequence of a relatively low rate of accumulation of spermine relative to spermidine and protein. The relationship between polyamine synthesis and DNA-synthetic activity was investigated in cultured prostate. A combination of insulin (3 mug/ml) and testosterone (0.1 muM caused a stimulatory response in the incorporation of [125I]iododeoxyuridine and in cell division, despite a depleted polyamine content and low ornithine decarboxylase activity in the cultured tissue.

Dependence of fracture toughness on annealing temperature in Pb(Zr0.52Ti0.48)O3 thin films produced by metal organic decomposition

2003 ◽  
Vol 18 (3) ◽  
pp. 578-584 ◽  
Author(s):  
X. J. Zheng ◽  
Y. C. Zhou ◽  
H. Zhong
Keyword(s):  
Thin Films ◽  
Fracture Toughness ◽  
Lead Zirconate Titanate ◽  
Annealing Temperature ◽  
Indentation Load ◽  
Pzt Thin Films ◽  
Metal Organic ◽  
Annealing Procedure ◽  
Crystalline Microstructure ◽  
Organic Decomposition

Lead zirconate titanate Pb(Zr0.52Ti0.48)O3 (PZT) thin films were grown on Pt/Ti/Si(001) by metal organic decomposition (MOD). The effects of the annealing procedure on the crystalline microstructure, hysteresis loops, and fracture toughness of PZT thin films were investigated by x-ray diffraction, RT66A analyzer, and Vickers indentation method, respectively. It was found that the fracture toughness, crystalline microstructure, and ferroelectric properties depend on the annealing procedure. When the annealing temperature is in the range of 600–750 °C, the higher the annealing temperature, the better the crystalline quality. The fracture pattern diagram, as a function of indentation load and annealing temperature, was introduced to describe the fracture characteristics of PZT thin film induced by indentation load. With the increase of annealing temperature from 600 °C to 750 °C, the fracture toughness of PZT thin films decreased from 0.492 MPa m1/2 to 0.478 MPa m1/2.

Bimetallic metal–organic framework derived Co3O4–CoFe2O4 composites with different Fe/Co molar ratios as anode materials for lithium ion batteries

2017 ◽  
Vol 46 (45) ◽  
pp. 15947-15953 ◽  
Author(s):  
Ming Zhong ◽  
Dong-Hui Yang ◽  
Ling-Jun Kong ◽  
Wei Shuang ◽  
Ying-Hui Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Metal Organic Framework ◽  
Lithium Ion ◽  
Molar Ratio ◽  
Molar Ratios ◽  
Metal Organic ◽  
Organic Framework

The morphology and electrochemical performance of the as-prepared Co3O4–CoFe2O4 composites from bimetallic metal–organic framework precursors depend greatly on the initial Fe3+/Co2+ molar ratio.

Low Temperature Growth of CaTiO3: Pr Phosphor Thin Film on Flexible Substrate by Photo- induced Chemical Solution Process

2012 ◽  
Vol 1454 ◽  
pp. 189-194 ◽  
Author(s):  
Tetsuo Tsuchiya ◽  
Tomohiko Nakajima ◽  
Kentaro Shinoda
Keyword(s):  
Thin Film ◽  
Flexible Substrate ◽  
Solution Process ◽  
Substrate Material ◽  
Nano Particles ◽  
Temperature Growth ◽  
Excimer Lamp ◽  
Metal Organic ◽  
Pet Substrate ◽  
Organic Decomposition

ABSTRACTPreparation of the CaTiO3:Pr (CTO:Pr) phosphor thin film on PET substrate was investigated by using the excimer laser-assisted metal organic decomposition(ELAMOD) and photo reaction of nano-particles (PRNP) process. The effects of the substrate material, starting materials, and UV sources on photoluminescence (PL) were investigated. By using the BaTiO3(BTO) nano-particles buffer layer and the CTO: Pr nano-particles as a starting material, CTO: Pr thin film on the PET substrate was successfully obtained by using the KrF laser and excimer lamp irradiation at 25°C. It was found that excimer lamp irradiation is effective for improving the PL of the films.

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