Point Defects in Relaxed Si1-xGex Alloy Layers

AbstractThe use of compositionally graded buffer layers in the growth of fully relaxed epitaxial Si1−xGex alloy layers has led to a major improvement in crystalline quality. A considerable reduction in the density of the threading dislocations has become possible, facilitating point defect studies in these materials. The issues addressed in this review are inherent to the coupling between band gap engineering and defect-related levels. Among them, the pinning behaviour, charge state effects and their consequence upon the thermal stability of point defects are discussed together with the impact of the fluctuation in Ge distribution

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Evaluation of the Impact of Fatty Acid Methyl Ester (FAME) Contamination on the Thermal Stability of Jet A

10.21236/ada594760 ◽

2013 ◽

Author(s):

Jr Morris ◽

Shardo Robert W. ◽

Higgins James ◽

Cook Kim ◽

Tanner Rhonda ◽

...

Keyword(s):

Thermal Stability ◽

Fatty Acid ◽

Methyl Ester ◽

Fatty Acid Methyl Ester ◽

Acid Methyl Ester ◽

Acid Methyl ◽

The Impact ◽

Thermal Stability Of

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Improving the stabilities of organic solar cells via employing a mixed cathode buffer layer

The European Physical Journal Applied Physics ◽

10.1051/epjap/2021210151 ◽

2021 ◽

Vol 95 (3) ◽

pp. 30201

Author(s):

Xi Guan ◽

Yufei Wang ◽

Shang Feng ◽

Jidong Zhang ◽

Qingqing Yang ◽

...

Keyword(s):

Thin Film ◽

Thermal Stability ◽

Solar Cells ◽

Mixed Layer ◽

Organic Solar Cells ◽

Buffer Layers ◽

Commercial Development ◽

Conversion Efficiencies ◽

Thermal Stability Of ◽

Cathode Buffer Layers

Organic solar cells (OSCs) have been fabricated using cathode buffer layers based on bathocuproine (BCP) and 4,4'-N,N'-dicarbazole-biphenyl (CBP). It is found that despite nearly same power conversion efficiencies, the bilayer of BCP/CBP shows increased thermal stability of device than the monolayer of BCP, mostly because upper CBP thin film stabilizes under BCP thin film. The mixed layer of BCP:CBP gives slightly decreased efficiency than BCP and BCP/CBP, mostly because the electron mobility of the OSC using BCP:CBP is decreased than those using BCP and BCP/CBP. However, the BCP:CBP increases thermal stability of device than BCP and BCP/CBP, ascribed to that the BCP and CBP effectively inhibit reciprocal tendencies of crystallizations in the mixed layer. Moreover, the BCP:CBP improves the light stability of device than the BCP and BCP/CBP, because the energy transfer from BCP to CBP in in the mixed layer effectively decelerates the photodegradation of BCP. We provide a facial method to improve the stabilities of cathode buffer layers against heat and light, beneficial to the commercial development of OSCs.

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Properties of HDPE/Clay/Wood Nanocomposites

First International Conference on Integration and Commercialization of Micro and Nanosystems, Parts A and B ◽

10.1115/mnc2007-21603 ◽

2007 ◽

Cited By ~ 1

Author(s):

Q. Wu ◽

Y. Lei ◽

F. Yao ◽

Y. Xu ◽

K. Lian

Keyword(s):

Thermal Stability ◽

Tensile Elongation ◽

Tensile Modulus ◽

Crystallization Rate ◽

Clay Content ◽

Melt Compounding ◽

Storage And Loss Moduli ◽

Organic Clay ◽

The Impact ◽

Thermal Stability Of

Composites based on high density polyethylene (HDPE), pine flour, and organic clay were made by melt compounding and injection molding. The influence of clay on crystallization behavior, mechanical properties, water absorption, and thermal stability of HDPE/pine composites were investigated. The HDPE/pine composites containing exfoliated clay were made by a two-step melt compounding procedure with a maleated polyethylene (MAPE) as a compatibilizer. Adding 2% clay to a HDPE/pine composite without MAPE decreased the crystallization temperature (Tc) and rate, and the crystallinity level. When 2% MAPE was added, the Tc and crystallization rate increased, but the crystallinity level was lowered. The flexural strength and the tensile strength of HDPE/pine composites increased 19.6% and 24.2% respectively with addition of 1% clay but then decreased slightly as the clay content was increased to 3%. The tensile modulus and tensile elongation were increased 11.8% and 13% respectively with addition of 1% clay but the storage and loss moduli barely change as the clay content was increased to 3%. The impact strength was lowered 7.5% by adding 1% clay, but did not decrease further as more clay was added. The moisture content and thickness swelling of the HDPE/pine composites was reduced by the clay, but did not improve the thermal stability.

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Deep Defects in 3C-SiC Generated by H+- and He+-Implantation or by Irradiation with High-Energy Electrons

Materials Science Forum ◽

10.4028/www.scientific.net/msf.645-648.439 ◽

2010 ◽

Vol 645-648 ◽

pp. 439-442 ◽

Cited By ~ 2

Author(s):

Michael Weidner ◽

Lia Trapaidze ◽

Gerhard Pensl ◽

Sergey A. Reshanov ◽

Adolf Schöner ◽

...

Keyword(s):

Thermal Stability ◽

Charge State ◽

Cross Section ◽

Capture Cross Section ◽

Pulse Length ◽

High Energy ◽

Capture Cross ◽

Intrinsic Defects ◽

High Energy Electrons ◽

Thermal Stability Of

Intrinsic defects in 3C-SiC are generated by implantation of H+- and He+-ions or irra¬diation with high energy electrons. The defect parameters and the thermal stability of the observed defects are determined. The capture-cross-section of the W6-center is directly measured by variation of the filling pulse length. The charge state of the W6-center is obtained from double-correlated DLTS investigations according to the Poole-Frenkel effect.

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The Effects of Oil Palm Fruit Bunch (OPFB) Fiber and Coupling Agent Loadings on the Performance of Hybrid Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.154 ◽

2012 ◽

Vol 535-537 ◽

pp. 154-160 ◽

Cited By ~ 2

Author(s):

Anizah Kalam ◽

M.N. Berhan ◽

Hanafi Ismail

Keyword(s):

Thermal Stability ◽

Tensile Strength ◽

Oil Palm ◽

Hybrid Composites ◽

Tensile Modulus ◽

Palm Fruit ◽

Degradation Tests ◽

Mechanical Performances ◽

The Impact ◽

Thermal Stability Of

Hybrid composites were prepared by incorporating oil palm fruit bunch (OPFB) fibre in the mixture of clay and polypropylene as secondary filler. OPFB and MAPP loadings were varied to investigate it effects on the performance. Tensile and impact tests were performed on the hybrid composites to evaluate their mechanical performances. Water absorption and thermal degradation tests were also conducted on the hybrid composites. Results indicated that the incorporation of OPFB in PP/PPnanoclay has decreased the thermal stability of hybrid composites. Tensile modulus of hybrid composites increased as the OPFB loading increases and further increased with the increasing of MAPP loading. Generally the tensile strength has decreased with the addition of OPFB, however slight increased was observed when the MAPP loading was increased. The impact strength has also increased with the increasing of OPFB for higher MAPP loading.

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Nature and Thermal Stability of Interfaces of c-Lu2O3 and a-Lu2O3 Films on Si Comparatively Probed by Paramagnetic Point Defects.

ECS Meeting Abstracts ◽

10.1149/ma2009-01/19/832 ◽

2009 ◽

Keyword(s):

Thermal Stability ◽

Point Defects ◽

Thermal Stability Of

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Identification and thermal stability of point defects in neutron-irradiated hexagonal boron nitride (h-BN)

Journal of Physics D Applied Physics ◽

10.1088/1361-6463/abc37c ◽

2020 ◽

Vol 54 (6) ◽

pp. 065303

Author(s):

J R Toledo ◽

K Krambrock

Keyword(s):

Thermal Stability ◽

Boron Nitride ◽

Point Defects ◽

Hexagonal Boron Nitride ◽

Thermal Stability Of

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Vinyl-terminated butadiene acrylonitrile improves the toughness, processing window, and thermal stability of bismaleimide resin

High Performance Polymers ◽

10.1177/0954008316673418 ◽

2016 ◽

Vol 29 (10) ◽

pp. 1199-1208 ◽

Cited By ~ 3

Author(s):

Dezhi Wang ◽

Xin Wang ◽

Lizhu Liu ◽

Chunyan Qu ◽

Changwei Liu ◽

...

Keyword(s):

Thermal Stability ◽

Mechanical Performance ◽

Resin System ◽

Excellent Performance ◽

Bismaleimide Resin ◽

Processing Window ◽

Low Viscosity ◽

Isothermal Test ◽

The Impact ◽

Thermal Stability Of

Structural materials with excellent toughness, a wide processing window, outstanding mechanical performance, and high thermal stability are highly desired in engineering. This work reports a novel bismaleimide (BMI) resin system fabricated using bis[4-(4-maleimidephen-oxy)phenyl)]propane (BMPP), 1-(2-methyl-5-(2,5-dioxo-2H-pyrrol-1(5 H)-yl) phenyl)-1H-pyrrole-2,5-dione (BTM), and diallyl bisphenol A (DABPA) by a melt method. The behaviors of the BTM/BMPP/DABPA resin were modified by adding vinyl-terminated butadiene acrylonitrile (VTBN) in various amounts. The cured BTM/BMPP/DABPA/VTBN resin system exhibited all of the abovementioned desirable properties. Excellent performance was achieved by the post-cured BMI resin containing 6 phr of VTBN (VTBN-6). The glass transition temperature ( Tg) and the 5% weight loss temperature of VTBN-6 were 278°C and 408°C, respectively. Relative to VTBN-0 (BMI resin without VTBN), the impact strength of cured VTBN-6 (12.32 KJ/m2) improved by 45.6%, and the fracture toughness values, KIC and GIC, increased by 48.7% and 26%, respectively. Moreover, the prepolymer of VTBN-6 exhibited low viscosity over a wide temperature range (70–200°C) under dynamic conditions and for an extended time (70 min; 75% improvement over VTBN-0) in an isothermal test. These results confirm the wide processing window of VTBN-6. The high toughness of the VTBN-containing BMI resin was compatible with other excellent performances of the modified resin.

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