Trends of Research in Active Addressing of LCDS

1995 ◽  
Vol 377 ◽  
Author(s):  
Ernst Lueder
Keyword(s):  
Low Temperature ◽  
Deposition Rate ◽  
Laser Annealing ◽  
Trap Density ◽  
Plastic Substrates ◽  
Term Stability ◽  
Long Term Stability ◽  
Effective Mobility ◽  
Materials Research

ABSTRACTActive addressing is focused on TFTs and MIMs as pixel-switches. The manufacture of a-Si-TFTs tends to settle down at a three-mask process as long as risky steps can be avoided. Fabrication throughput is being enhanced by increasing the deposition rate for a-Si- and poly-Si-layers processed by PECV.D. For wider process windows and for building row drivers with a-Si-TFTs effective mobility will have to be increased beyond 1 cm2/Vs especially by new TFT-electrodes, a protective sandwich around the a-Si-layer and modified process techniques. Poly-Si-TFTs should be fabricated at temperatures below 450 °C and preferably without laser annealing before they become an economic solution. MIMs still require more materials research to find a dielectric with a larger trap density enhancing speed of operation, lower addressing voltages and electrodes for improved long-term stability. Low-temperature processes are required for LCDs with plastic substrates.

Chemical Robotics Enabled Exploration of Stability and Photoluminescent Behavior in Multicomponent Hybrid Perovskites via Machine Learning

2020 ◽  
Author(s):  
Kate Higgins ◽  
Sai Mani Valleti ◽  
Maxim Ziatdinov ◽  
Sergei Kalinin ◽  
Mahshid Ahmadi
Keyword(s):  
Machine Learning ◽  
Optimization Methods ◽  
Combinatorial Synthesis ◽  
Ambient Conditions ◽  
Term Stability ◽  
Long Term Stability ◽  
Composition Space ◽  
Materials Research ◽  
The Stability

<p>Hybrid organic-inorganic perovskites have attracted immense interest as a promising material for the next-generation solar cells; however, issues regarding long-term stability still require further study. Here, we develop automated experimental workflow based on combinatorial synthesis and rapid throughput characterization to explore long-term stability of these materials in ambient conditions, and apply it to four model perovskite systems: MA<sub>x</sub>FA<sub>y</sub>Cs<sub>1-x-y</sub>PbBr<sub>3</sub>, MA<sub>x</sub>FA<sub>y</sub>Cs<sub>1-x-y</sub>PbI<sub>3</sub>, (Cs<sub>x</sub>FA<sub>y</sub>MA<sub>1-x-y</sub>Pb(Br<sub>x+y</sub>I<sub>1-x-y</sub>)<sub>3</sub>) and (Cs<sub>x</sub>MA<sub>y</sub>FA<sub>1-x-y</sub>Pb(I<sub>x+y</sub>Br<sub>1-x-y</sub>)<sub>3</sub>). We also develop a machine learning-based workflow to quantify the evolution of each system as a function of composition based on overall changes in photoluminescence spectra, as well as specific peak positions and intensities. We find the stability dependence on composition to be extremely non-uniform within the composition space, suggesting the presence of potential preferential compositional regions. This proposed workflow is universal and can be applied to other perovskite systems and solution-processable materials. Furthermore, incorporation of experimental optimization methods, e.g., those based on Gaussian Processes, will enable the transition from combinatorial synthesis to guide materials research and optimization.</p>

Correlation between diffusion barriers and alloying energy in binary alloys

2016 ◽  
Vol 18 (4) ◽  
pp. 3302-3307 ◽  
Author(s):  
Ulrik Grønbjerg Vej-Hansen ◽  
Jan Rossmeisl ◽  
Ifan E. L. Stephens ◽  
Jakob Schiøtz
Keyword(s):  
Fuel Cells ◽  
Low Temperature ◽  
Binary Alloys ◽  
Diffusion Barriers ◽  
Cathode Catalysts ◽  
Term Stability ◽  
Long Term Stability ◽  
Low Temperature Fuel Cells ◽  
Pt Alloys

In this paper, we explore the notion that a negative alloying energy may act as a descriptor for long term stability of Pt-alloys as cathode catalysts in low temperature fuel cells.

Enhanced long-term stability of perovskite solar cells by passivating grain boundary with polydimethylsiloxane (PDMS)

2019 ◽  
Vol 7 (36) ◽  
pp. 20832-20839 ◽  
Author(s):  
Woochul Kim ◽  
Jong Bae Park ◽  
Hyeonghun Kim ◽  
Kihyeun Kim ◽  
Jiyoon Park ◽  
...  
Keyword(s):  
Solar Cells ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Perovskite Solar Cells ◽  
Trap Density ◽  
Term Stability ◽  
Long Term Stability

Highly stable perovskite solar cells are achieved by passivating the grain boundaries with PDMS to inhibit the water–perovskite reaction and reduce the trap density, ensuring complete photovoltaic operation even after 5000 h under RH 70%.

Low-Temperature CO Oxidation and Long-Term Stability of Au/In2O3−TiO2Catalysts

2009 ◽  
Vol 113 (20) ◽  
pp. 8911-8917 ◽  
Author(s):  
Vicente Rodríguez-González ◽  
Rodolfo Zanella ◽  
Lina A. Calzada ◽  
Ricardo Gómez
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Term Stability ◽  
Long Term Stability ◽  
Low Temperature Co Oxidation

Soluble pentacene thin-film transistor using a high solvent and heat resistive polymeric dielectric with low-temperature processability and its long-term stability

2009 ◽  
Vol 10 (3) ◽  
pp. 506-510 ◽  
Author(s):  
Kyoseung Sim ◽  
Youngill Choi ◽  
Hyojoong Kim ◽  
Sungwoo Cho ◽  
Sung Cheol Yoon ◽  
...  
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Thin Film Transistor ◽  
Term Stability ◽  
Long Term Stability

scholarly journals Effects of Binary (Lithium/Natrium)2 Carbonates on the Phase and Microstructural Stability of Lscf-Sdc for Low Temperature Solid Oxide Fuel Cells

2020 ◽  
Vol 49 (12) ◽  
pp. 3101-3113
Author(s):  
Hamimah Abd. Rahman ◽  
Linda Agun ◽  
Kei Hoa Ng ◽  
Sufizar Ahmad ◽  
Nur Azmah Nordin
Keyword(s):  
Low Temperature ◽  
High Energy ◽  
Solid Oxide ◽  
Stability Test ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Microstructural Stability ◽  
Term Stability ◽  
Long Term Stability

Most studies focus on introducing of doped ceria carbonate into cathode materials to enhance the cathode ionic conductivity for low temperature solid oxide fuel cell. In this work, we aim to identify the influence of Lithium/Natrium binaries (Li/Na)2 carbonates addition on Lanthanum Strontium Carbonate Ferrite-Samarium-Doped Ceria (LSCF-SDC) composite cathode on the phase and microstructural stability under long-term durability of 1000 h. Three different binaries (Li/Na)2 carbonate of 67:33, 62:38, and 53:47 mol.% were incorporated into LSCF-SDC via high energy ball milling method. The phase and microstructural stability as a function of operating temperature (400 and 600 °C) were studied using X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). Archimedes principle was applied to evaluate the porosity of the cathode pellets. Electrochemical impedance spectroscopy measurements were performed by using impedance setup at 600 °C under open-circuit condition. The XRD findings demonstrated that cathodes able to retain their chemical phases after stability test. Qualitative results show that the cathode morphology exhibits a slight increment on the particle size after the ageing process at 1000 h. All cathodes prepared at various binary carbonate ratio still maintain their porosity values between 26 and 32% after long-term stability test. This finding has yielded a smaller area specific resistance of 0.66 Ω.cm2 at 600 °C. Therefore, incorporating binary (Li/Na)2 carbonate in LSCF-SDC shows a good combination when insignificant changes observed after long-term stability test of 1000 h.

Revealing the compositional effect on the intrinsic long-term stability of perovskite solar cells

2020 ◽  
Vol 8 (16) ◽  
pp. 7653-7658 ◽  
Author(s):  
Liqiang Xie ◽  
Peiquan Song ◽  
Lina Shen ◽  
Jianxun Lu ◽  
Kaikai Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Operational Stability ◽  
Trap Density ◽  
Compositional Effect ◽  
Term Stability ◽  
Long Term Stability

The trap-density of perovskites can be suppressed by component doping, which is beneficial for improving the operational stability of perovskite solar cells.

Highly-efficient steam reforming of methanol over copper modified molybdenum carbide

RSC Advances ◽  
2014 ◽  
Vol 4 (83) ◽  
pp. 44175-44184 ◽  
Author(s):  
Yufei Ma ◽  
Guoqing Guan ◽  
Xiaogang Hao ◽  
Zhijun Zuo ◽  
Wei Huang ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Activity ◽  
Steam Reforming ◽  
Molybdenum Carbide ◽  
Steam Reforming Of Methanol ◽  
Term Stability ◽  
Long Term Stability ◽  
Highly Efficient

Low-temperature SRM reaction was realized over nanostructured Cu–MoxCy catalysts with high activity as well as long-term stability.

Sign in / Sign up

Export Citation Format

Share Document