(II) and europium (III)
... First and foremost, I would like to thank the Department of Chemistry and Physics at Western Carolina University, Cullowhee, NC for giving me the opportunity to further my education in the Masters of Chemistry program. I would like to give special thanks to my director, Dr. Channa De Silva for his e ...
... First and foremost, I would like to thank the Department of Chemistry and Physics at Western Carolina University, Cullowhee, NC for giving me the opportunity to further my education in the Masters of Chemistry program. I would like to give special thanks to my director, Dr. Channa De Silva for his e ...
Triplet states in organic semiconductors Materials Science and
... For the sake of readability, we do not spell out all the chemical abbreviations for the compounds referred to in the text. A table listing the abbreviations and the chemical names is appended at the end of the article. 2. Basic properties of triplet states in organic semiconductors 2.1. Organic semi ...
... For the sake of readability, we do not spell out all the chemical abbreviations for the compounds referred to in the text. A table listing the abbreviations and the chemical names is appended at the end of the article. 2. Basic properties of triplet states in organic semiconductors 2.1. Organic semi ...
187457_187457 - [email protected]
... energy carriers, as it achieves nearly zero emission of pollutants from power generators, such as fuel cells. However, efforts to make use of hydrogen as an on-board power source have been hampered by the safety concerns and volumetric constraints. 1-4 In order for the wide-spread, practical use of ...
... energy carriers, as it achieves nearly zero emission of pollutants from power generators, such as fuel cells. However, efforts to make use of hydrogen as an on-board power source have been hampered by the safety concerns and volumetric constraints. 1-4 In order for the wide-spread, practical use of ...
File
... 1) Why are most metals very lustrous and good conductors of heat and electricity? • Valence e- in a metal are shared by all the metal atoms and can move freely, thus good conductors • e- absorb light and are excited easily. They relax and emit nearly all the light they absorb, thus most metals are s ...
... 1) Why are most metals very lustrous and good conductors of heat and electricity? • Valence e- in a metal are shared by all the metal atoms and can move freely, thus good conductors • e- absorb light and are excited easily. They relax and emit nearly all the light they absorb, thus most metals are s ...
Discoveries of New Topological STates of Matter Beyond Topological Insulators
... low temperatures, the filled 3p6 orbital forms the lowest valence band, whereas the empty 4s orbital forms the lowest conduction band, respectively. These two bands are found to be separated by a large band-gap (∼ 12 eV), and therefore solid argon is a nearly ideal conventional band insulator. Simil ...
... low temperatures, the filled 3p6 orbital forms the lowest valence band, whereas the empty 4s orbital forms the lowest conduction band, respectively. These two bands are found to be separated by a large band-gap (∼ 12 eV), and therefore solid argon is a nearly ideal conventional band insulator. Simil ...
Discoveries of New Topological States of Matter Beyond Topological
... low temperatures, the filled 3p6 orbital forms the lowest valence band, whereas the empty 4s orbital forms the lowest conduction band, respectively. These two bands are found to be separated by a large band-gap (∼ 12 eV), and therefore solid argon is a nearly ideal conventional band insulator. Simil ...
... low temperatures, the filled 3p6 orbital forms the lowest valence band, whereas the empty 4s orbital forms the lowest conduction band, respectively. These two bands are found to be separated by a large band-gap (∼ 12 eV), and therefore solid argon is a nearly ideal conventional band insulator. Simil ...
Fabrication and photoelectrical properties of SnO2/p
... The band gap of SnO2 film was determined from the measured transmittance spectra. Figure 2(e) shows the (αhν)2 vs hν plot of SnO2 film on glass substrate, which was calculated by a UV-VIS spectrometer. The inset of Fig.2(e) shows the transmittance curve of SnO2 film. The average transmittance of the ...
... The band gap of SnO2 film was determined from the measured transmittance spectra. Figure 2(e) shows the (αhν)2 vs hν plot of SnO2 film on glass substrate, which was calculated by a UV-VIS spectrometer. The inset of Fig.2(e) shows the transmittance curve of SnO2 film. The average transmittance of the ...
Titania-Silica Composites - Scientific Research Publishing
... Composites made out of silica and titania can have the photocatalytic properties from titania, the high stability from silica and extra properties coming from chemical bonds between the two materials [1]. Titania is photocatalytic because it is able to absorb energy from light, and then use that ene ...
... Composites made out of silica and titania can have the photocatalytic properties from titania, the high stability from silica and extra properties coming from chemical bonds between the two materials [1]. Titania is photocatalytic because it is able to absorb energy from light, and then use that ene ...
10 - E-Prints Complutense
... 3.11. Magnetic properties................................................................................................ 68 3.12. Thermal conductivity ............................................................................................. 69 3.13. Seebeck coefficient & Electronic Conductivity ...
... 3.11. Magnetic properties................................................................................................ 68 3.12. Thermal conductivity ............................................................................................. 69 3.13. Seebeck coefficient & Electronic Conductivity ...
Aluminum Borohydride Complex with
... Given the noncoordinated weakly H···H bonded EDA with surrounding BH4 groups in the structure, it is expected that this EDA can easily detach from the structure upon heating. 4.3. Chemical Bond Analysis. To understand the bonding character and decomposition mechanism of Al(EDA)3·3BH4· EDA compound, ...
... Given the noncoordinated weakly H···H bonded EDA with surrounding BH4 groups in the structure, it is expected that this EDA can easily detach from the structure upon heating. 4.3. Chemical Bond Analysis. To understand the bonding character and decomposition mechanism of Al(EDA)3·3BH4· EDA compound, ...
Controlled Synthesis of Organic/Inorganic van der Waals Solid for
... The mapping is collected at 760 nm under the same conditions. Considerable difference in the PL intensity of the perovskites is found on graphene (purple in (a), ≈104), MoS2 (blue in (b), ≈106), and h-BN (light blue in (c), ≈107), respectively. The profile of the MoS2 layer is also found in dark blu ...
... The mapping is collected at 760 nm under the same conditions. Considerable difference in the PL intensity of the perovskites is found on graphene (purple in (a), ≈104), MoS2 (blue in (b), ≈106), and h-BN (light blue in (c), ≈107), respectively. The profile of the MoS2 layer is also found in dark blu ...
TRIARYLBORON COMPOUNDS AND THEIR PLATINUM(II) COMPLEXES: PHOTOPHYSICAL PROPERTIES AND APPLICATIONS IN OPTOELECTRONICS
... I have been very fortunate to have had opportunities to study abroad during my doctoral work, both of which were incredible cultural and research experiences. I would like to thank Prof. Yue Wang and his group at Jilin University in the city of Changchun, China for hosting me as an exchange student, ...
... I have been very fortunate to have had opportunities to study abroad during my doctoral work, both of which were incredible cultural and research experiences. I would like to thank Prof. Yue Wang and his group at Jilin University in the city of Changchun, China for hosting me as an exchange student, ...
ipc-t-50 terms and definitions
... An in-circuit testing technique that drives digital circuitry outputs to a given logic level, by supplying pulses of sufficient electrical current magnitude in parallel with the outputs, in order to overdrive the logic state conditions of the next digital device inputs. ...
... An in-circuit testing technique that drives digital circuitry outputs to a given logic level, by supplying pulses of sufficient electrical current magnitude in parallel with the outputs, in order to overdrive the logic state conditions of the next digital device inputs. ...
Star-Shaped Conjugated Systems
... Frenkel exciton models. Its accuracy of interpolations is high; however, the prediction of and E by extrapolation can be problematic [17,32]. The optical band gap E(n) and its limiting value E is a very important feature for many applications of conjugated oligomers in materials science. ...
... Frenkel exciton models. Its accuracy of interpolations is high; however, the prediction of and E by extrapolation can be problematic [17,32]. The optical band gap E(n) and its limiting value E is a very important feature for many applications of conjugated oligomers in materials science. ...
growth of k2co3-doped kdp crystal from an aqueous solution and an
... coefficient. The crystal structure is tetragonal with the lattice parameters a = b = 0.7448 nm and c = 0.6977 nm. A KDP single crystal is piezoelectric at room temperature, and below 123 K (Curie point) it transforms to the ferroelectric phase and has an orthorhombic structure. This crystal is an ex ...
... coefficient. The crystal structure is tetragonal with the lattice parameters a = b = 0.7448 nm and c = 0.6977 nm. A KDP single crystal is piezoelectric at room temperature, and below 123 K (Curie point) it transforms to the ferroelectric phase and has an orthorhombic structure. This crystal is an ex ...
PDF
... Trivalent metal ions are generally adsorbed on the surface layer, but in a specific study it is seen that trivalent Fe3+ ions occupy the FeO2− site in the form of FeO42− by compensating the charge deficiency via nearby potassium or hydrogen vacancy [9]. Some other groups, like dyes, are also introdu ...
... Trivalent metal ions are generally adsorbed on the surface layer, but in a specific study it is seen that trivalent Fe3+ ions occupy the FeO2− site in the form of FeO42− by compensating the charge deficiency via nearby potassium or hydrogen vacancy [9]. Some other groups, like dyes, are also introdu ...
Luminescence properties of violet-orange
... Nanomaterials with different morphologies have attracted great attention for their promising applications such as optical materials, effective catalyst, drug-delivery carriers [1-3], etc. SrCO3 is one of nanomaterial widely used for the starting material in preparation of strontium compounds [4-6]. ...
... Nanomaterials with different morphologies have attracted great attention for their promising applications such as optical materials, effective catalyst, drug-delivery carriers [1-3], etc. SrCO3 is one of nanomaterial widely used for the starting material in preparation of strontium compounds [4-6]. ...
Excited State Dynamics of Metalloporphyrins Utilized in Organic
... short diffusion length (10 nm) relative to the absorbing layer thickness (100-200 nm). Porphyrins, of which chlorophylls are derivatives, remain at the forefront of OPV investigation due to their success in natural photosynthesis and potential in photovoltaic devices. Furthermore, platinum octaethyl ...
... short diffusion length (10 nm) relative to the absorbing layer thickness (100-200 nm). Porphyrins, of which chlorophylls are derivatives, remain at the forefront of OPV investigation due to their success in natural photosynthesis and potential in photovoltaic devices. Furthermore, platinum octaethyl ...
Silica (quartz) Silica, SiO2, is a white or colorless crystalline
... Silica, SiO2, is a white or colorless crystalline compound found mainly as quartz, sand, flint, and many other minerals. Silica is an important ingredient to manufacture a wide variety of materials. Quartz; Quartz is the most abundant silica mineral. Pure Quartz is colorless and transparent. It occu ...
... Silica, SiO2, is a white or colorless crystalline compound found mainly as quartz, sand, flint, and many other minerals. Silica is an important ingredient to manufacture a wide variety of materials. Quartz; Quartz is the most abundant silica mineral. Pure Quartz is colorless and transparent. It occu ...
The physics of manganites: Structure and transport
... ternal field is to increase the ratio of the former events, reducing the latter, by aligning the polarization of the magnetic layer along the direction of the external field. This effect is a few tens of percent, and has the very important advantage of not being limited to low temperatures. Spin-val ...
... ternal field is to increase the ratio of the former events, reducing the latter, by aligning the polarization of the magnetic layer along the direction of the external field. This effect is a few tens of percent, and has the very important advantage of not being limited to low temperatures. Spin-val ...
47.Piezoelectric Ceramics Characterization.pdf
... used to tailor the properties of interest. PZT ceramics are rarely utilized without the addition of dopants to modify some of their properties. A-site additives tend to lower the dissipation factor, which affects heat generation, but also lower the piezoelectric coefficients; for this reason they ar ...
... used to tailor the properties of interest. PZT ceramics are rarely utilized without the addition of dopants to modify some of their properties. A-site additives tend to lower the dissipation factor, which affects heat generation, but also lower the piezoelectric coefficients; for this reason they ar ...
Light Scattering of Semiconducting Nanoparticles
... of discrete lines, which change their positions with particle size, and a blueshift of the band gap with respect to the corresponding bulk material is observed. This blueshift gives a measure of the confinement, which can be observed, for example, in absorption [11] or photoluminescence (PL) [12] exp ...
... of discrete lines, which change their positions with particle size, and a blueshift of the band gap with respect to the corresponding bulk material is observed. This blueshift gives a measure of the confinement, which can be observed, for example, in absorption [11] or photoluminescence (PL) [12] exp ...
Method of making an epitaxial gallium arsenide semiconductor
... obtaining an ingot of a relatively large diameter, higher cost of production, and lower mechanical strength. In 40 face of a top layer of the at least one intermediate layer. The present semiconductor wafer with the epitaxial the light of these disadvatages of the monocrystalline GaAs layer is suita ...
... obtaining an ingot of a relatively large diameter, higher cost of production, and lower mechanical strength. In 40 face of a top layer of the at least one intermediate layer. The present semiconductor wafer with the epitaxial the light of these disadvatages of the monocrystalline GaAs layer is suita ...
Mechanochemical Doping of a Non
... in al ZnO sample, and no other peaks corresponding to the N-related LVM are observed in these two spectra. This means that the calcin ation of the mixture of ZnO and urea does not cause any reaction, and only urea is simply burnt out by 400 oC. Thus, N cannot be doped into ZnO only by calcining the ...
... in al ZnO sample, and no other peaks corresponding to the N-related LVM are observed in these two spectra. This means that the calcin ation of the mixture of ZnO and urea does not cause any reaction, and only urea is simply burnt out by 400 oC. Thus, N cannot be doped into ZnO only by calcining the ...
- TDDFT.org
... should possess a band gap of 1.2 to 1.5 eV and display a strong absorption at the optical edge [2]. The best-known absorber material for thin-film photovoltaics is at present CuInx Ga1−x Se2 , with a record energy conversion efficiency of 21.7% [3]. Its band gap can be tuned continuously between 1.0 ...
... should possess a band gap of 1.2 to 1.5 eV and display a strong absorption at the optical edge [2]. The best-known absorber material for thin-film photovoltaics is at present CuInx Ga1−x Se2 , with a record energy conversion efficiency of 21.7% [3]. Its band gap can be tuned continuously between 1.0 ...
Semiconductor
A semiconductor material has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Semiconductors are the foundation of modern electronics. Semiconducting materials exist in two types - elemental materials and compound materials. The modern understanding of the properties of a semiconductor relies on quantum physics to explain the movement of electrons and holes in a crystal lattice. The unique arrangement of the crystal lattice makes silicon and germanium the most commonly used elements in the preparation of semiconducting materials. An increased knowledge of semiconductor materials and fabrication processes has made possible continuing increases in the complexity and speed of microprocessors and memory devices. Some of the information on this page may be outdated within a year because new discoveries are made in the field frequently.The electrical conductivity of a semiconductor material increases with increasing temperature, which is behaviour opposite to that of a metal. Semiconductor devices can display a range of useful properties such as passing current more easily in one direction than the other, showing variable resistance, and sensitivity to light or heat. Because the electrical properties of a semiconductor material can be modified by controlled addition of impurities, or by the application of electrical fields or light, devices made from semiconductors can be used for amplification, switching, and energy conversion.Current conduction in a semiconductor occurs through the movement of free electrons and ""holes"", collectively known as charge carriers. Adding impurity atoms to a semiconducting material, known as ""doping"", greatly increases the number of charge carriers within it. When a doped semiconductor contains mostly free holes it is called ""p-type"", and when it contains mostly free electrons it is known as ""n-type"". The semiconductor materials used in electronic devices are doped under precise conditions to control the concentration and regions of p- and n-type dopants. A single semiconductor crystal can have many p- and n-type regions; the p–n junctions between these regions are responsible for the useful electronic behaviour.Some of the properties of semiconductor materials were observed throughout the mid 19th and first decades of the 20th century. Development of quantum physics in turn allowed the development of the transistor in 1947. Although some pure elements and many compounds display semiconductor properties, silicon, germanium, and compounds of gallium are the most widely used in electronic devices. Elements near the so-called ""metalloid staircase"", where the metalloids are located on the periodic table, are usually used as semiconductors.The nickname of the southern area of Northern California is Silicon Valley because of all the influential tech companies that have their headquarters there. An integral part of today’s technology is built upon semiconductors, which are made primarily of silicon. Some major companies include Marvell Technology Group, National Semiconductor (now part of Texas Instruments), and Advanced Micro Devices.