Sökning: "perovskites"

Visar resultat 21 - 25 av 43 avhandlingar innehållade ordet perovskites.

  1. 21. Synthesis, Structure, and Magnetic Properties of Double Perovskites of the type A2MnBO6 and A2FeBO6; (A=Ca, Sr, Ba, La; B=W, Mo, Cr

    Författare :Abul Kalam Azad; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  2. 22. Synthetis, Structure, and Magnetic Properties of Double Perovskites of the type A2MnBO6 and A2FeBO6 (A=Ca, Sr, Ba, La; B=W, Mo, Cr)

    Författare :Abul Kalam Azad; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  3. 23. Color Tuning for Perovskite Light-Emitting Diodes

    Författare :Hongling Yu; Feng Gao; Xiaoke Liu; Olle Inganäs; Fengling Zhang; Maksym V. Kovalenko; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Perovskite light-emitting diodes; Color tuning; Pure and mixed halide; Spectral stability; White emission;

    Sammanfattning : Metal halide perovskites (MHPs) are recognized as promising semiconductor materials for a variety of optical and electrical device applications due to their cost-effective and outstanding optoelectronic properties. As one of the most significant applications, perovskite light-emitting diodes (PeLEDs) hold promise for future lighting and display technologies, attributed to their high photoluminescence quantum yield (PLQY), high color purity, and tunable emission color. LÄS MER

  4. 24. Effects of Environment on Charge Recombination in Organo-Metal-Halide Perovskite Observed by Photoluminescence Microscopy and Spectroscopy

    Författare :Jun Li; NanoLund; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Environment; photoluminescence microscopy and spectroscopy; organo-metal-halide perovskite; charge recombination;

    Sammanfattning : Organo-metal-halide (OMH) perovskites form a new class of materials withperovskite crystal structure ABX3 where A is an organic molecule, B is lead (Pb)and X is a halide atom (I or Br). OMH perovskite semiconductors have been widely used in photovoltaics due to their very strong absorption of sun light, very suitable electrical properties, and the ease of preparation. LÄS MER

  5. 25. Vibrational and Structural Characterisation in Two Perovskite Challenges: A Density Functional Theory Study

    Författare :Erik Jedvik Granhed; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; phonon; chemical expansion; materials modelling; oxyhydride; polaron; vibrational analysis; BaTiO3; BaZrO3; anti-ferrodistortive; density functional theory;

    Sammanfattning : The modelling of perovskites using density functional theory (DFT) can sometimes be a challenge with many different states very close in energy. In particular, the tilting of the inscribed octahedron, as well as the formation of electron polarons, leads to states with energy differences in the meV range. LÄS MER