Mostrando 5,541 - 5,560 Resultados de 5,854 Para Buscar 'perovskita~', tiempo de consulta: 2.69s Limitar resultados
  1. 5541
    “…Here, we report an antisite defect mechanism for room temperature ferroelectricity in epitaxial thin films of yttrium orthoferrite, YFeO(3), a perovskite-structured canted antiferromagnet. A combination of piezoresponse force microscopy, atomically resolved elemental mapping with aberration corrected scanning transmission electron microscopy and density functional theory calculations reveals that the presence of Y(Fe) antisite defects facilitates a non-centrosymmetric distortion promoting ferroelectricity. …”
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  2. 5542
    “…[Image: see text] The double perovskite YBaMn(2)O(6) exhibited complex structural, magnetic, and charge/orbital ordering phase transitions. …”
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  3. 5543
    “…Here we report the bulk photovoltaic effect in two-dimensional ferroelectric CuInP(2)S(6) with enhanced photocurrent density by two orders of magnitude higher than conventional bulk ferroelectric perovskite oxides. The bulk photovoltaic effect is inherently associated to the room-temperature polar ordering in two-dimensional CuInP(2)S(6). …”
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  4. 5544
    “…Perovskite quantum dots (QDs) are of interest for solution‐processed lasers; however, their short Auger lifetime has limited lasing operation principally to the femtosecond temporal regime the photoexcitation levels to achieve optical gain threshold are up to two orders of magnitude higher in the nanosecond regime than in the femtosecond. …”
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  5. 5545
    “…As a proof of concept, a versatile WASHP‐based light‐emitting touch‐responsive device (WASHP‐LETD) and perovskite quantum dot (PeQD)‐based white LED backlight are designed. …”
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  6. 5546
    “…Energy band alignment theory has been widely used to understand interface charge transfer in semiconductor/semiconductor heterojunctions for solar conversion or storage, such as quantum-dot sensitized solar cells, perovskite solar cells and photo(electro)catalysis. …”
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  7. 5547
    “…The high voltage losses ([Formula: see text] ), originating from inevitable electron-phonon coupling in organic materials, limit the power conversion efficiency of organic solar cells to lower values than that of inorganic or perovskite solar cells. In this work, we demonstrate that this [Formula: see text] can in fact be suppressed by controlling the spacing between the donor (D) and the acceptor (A) materials (DA spacing). …”
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  8. 5548
    “…Severe oxygen deficiency also makes BaTiO(3) lattices energetically unfavorable and lastly induces a destruction of local perovskite structure of the barrier. Ferroelectric properties are thus degraded, which reduces barrier contrast between ON and OFF states and smears electroresistance characteristics of Pt/BaTiO(3)/Nb:SrTiO(3) FTJs. …”
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  9. 5549
  10. 5550
  11. 5551
    “…Since both WO(3) and ReO(3) oxides have perovskite-type structures, the formation of their solid solutions (ReO(3)–WO(3) or Re(x)W(1–x)O(3)) can be expected, which may be of significant academic and industrial interest. …”
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  12. 5552
    “…X-ray diffraction patterns of tested composites reveal the presence of pure perovskite phases in samples sintered at 950 °C and the presence of Sr(4)Fe(4)O(11), YMnO(3), and La(0.775)Sr(0.225)MnO(3.047) phases in samples sintered at 1100 °C. …”
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  13. 5553
  14. 5554
    “…The new compound crystallizes in a Sr [Formula: see text] GaO [Formula: see text] CuS-type structure with two distinct Cr sites, Cr(1) in the perovskite-like block layers of “Sr [Formula: see text] Cr [Formula: see text] O [Formula: see text] ” and Cr(2) in the ThCr [Formula: see text] Si [Formula: see text] -type layers of “SrCr [Formula: see text] As [Formula: see text] ”. …”
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  15. 5555
  16. 5556
  17. 5557
    “…It was demonstrated that using different basicities for upper and lower layer of sintering bed would promote formation of silica-ferrite of calcium and aluminum (SFCA) with simultaneous reduction of perovskite, improving the sinter quality.…”
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  18. 5558
    “…The optical properties of dynamically stable WSSe AAA and WSSe AA′A structures are also calculated, and the absorption coefficients at the visible light region are found to be ∼3.5 × 10(5) cm(–1), which is comparable to the perovskite material absorption coefficient. Moreover, we have compared the optical characteristics of dynamically stable WSSe AAA and WSSe AA′A structures with their monolayer structures to realize the significance of stacking trilayer structures. …”
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  19. 5559
    “…The prospect of 2‐dimensional electron gases (2DEGs) possessing high mobility at room temperature in wide‐bandgap perovskite stannates is enticing for oxide electronics, particularly to realize transparent and high‐electron mobility transistors. …”
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  20. 5560
    “…Compared with pure Pb-based perovskite ferroelectric materials, BiMeO(3)–PbTiO(3) (Me = Sc(3+), In(3+), and Yb(3+)) systems have remarkable advantages in their Curie temperatures. …”
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