Sökning: "spectra ab"

Visar resultat 1 - 5 av 18 uppsatser innehållade orden spectra ab.

  1. 1. Surface orientation of the formamidinium cation in black formamidinium lead iodide perovskite

    Master-uppsats, Stockholms universitet/Fysikum

    Författare :Torsten Geirsson; [2023]
    Nyckelord :Perovskite; Formamidinium; Surface;

    Sammanfattning : Formamidinium lead iodide perovskite (FAPI) holds promise to be used in high–efficiency solar cells. A comprehensive understanding of the immediate surface properties of this material can provide insights into its interaction with other materials and guide future engineering of its interface with other constituents of the solar cell. LÄS MER

  3. 2. Prussian White In Sodium- Ion Batteries : An evaluation of organic and inorganic coatings on active material particles

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Philip Jansson; [2021]
    Nyckelord :Sodium-ion batteries; Prussian White; Coating; Surface engineering; Zinc oxide; Polyaniline; Natriumjonbatterier; Berlinervitt; Beläggning; Ytmodifiering; Zinkoxid; Polyanilin;

    Sammanfattning : Emerging markets in electrochemical energy storage, such as stationary grid storage, coupled with future concerns over the availability of lithium, places sodium-ion battery (SIB) technologies at a unique position to enter the market as a commercially viable alternative. Current shortcomings in the performance of cathode materials in SIBs would necessarily need to be addressed if this technology is to compete with existing commercial lithium-ion battery counterparts. LÄS MER

  4. 3. Analysis of stellar spectra with machine learning

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Alvaro Segovia Otero; [2020]
    Nyckelord :Galactic Archaeology; machine learning; chemical abundances; FGK stars; Physics and Astronomy;

    Sammanfattning : Researchers in the field of Galactic Archaeology have entered the era of industrial revolution. Upcoming surveys are planning on observing tens of millions of stars and high precision and accuracy must be ensured when deriving their stellar parameters and elemental abundances. LÄS MER

  5. 4. Formation of Eu II spectral features in magnetic chemically peculiar stars

    Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Luca Schmidt; [2020]
    Nyckelord :;

    Sammanfattning : The advancing resolution of modern spectrometers uncovers increasingly detailed spectral features in astrophysical observations which can be attributed to properties of the energy structure of the corresponding atomic systems such as fine, hyperfine and Zeeman splitting. At the same time, increasing computational power enables us to include these quantum mechanical interactions on different levels of sophistication in our theoretical atomic structure calculations. LÄS MER

  7. 5. Teststation för industriella UV-celler

    Kandidat-uppsats, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Masud Omar Ahmed; [2019]
    Nyckelord :UV flow cell; UV-cell; HPLC; HPLC UV; Chromatography; test station; lab cells; industrial cells; absorbance; absorbance spectra; pressure; flow; absorption; UV-celler; Vätskekromatografi; industriceller; uv flödescell; HPLC; HPLC UV; UV kyvetter; teststation; absorbans; absorption; tryck; flöde; absorption;

    Sammanfattning : GE Healthcare Bio-Sciences AB in Umeå produce a variety of chromatography systems. One of the main components in chromatography is the UV module, which measure the light absorption of different wavelengths in the liquid being pumped through a cell. Currently at the Umeå site two types of UV-cells are produced; lab cells and industrial cells. LÄS MER