Sökning: "thin-film"

Visar resultat 16 - 20 av 447 avhandlingar innehållade ordet thin-film.

1. 16. Fundamental processes in thin film growth : The origin of compressive stress and the dynamics of the early growth stages

   Författare :Daniel Magnfält; Ulf Helmsersson; Eric Chason; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The fundamental mechanisms behind the generation of compressive stresses in polycrystalline thin films, the effects of pulsed deposition fluxes on the dynamics of the early growth stages as well as the generation of energetic Ar+ ions in high power impulse magnetron sputtering (HiPIMS) discharges has been studied in this thesis.It was found that compressive film stresses in Mo films deposited using energetic vapor fluxes are correlated with high film densities while only a slight lattice expansion compared to relaxed Mo was found. LÄS MER

3. 17. Impedance of Soft Magnetic Multilayers : Application to GHz Thin Film Inductors

   Författare :Andrey Gromov; KTH; []
   Nyckelord :inductor; impedance; magnetic; eddy currents; FMR;

   Sammanfattning : A theoretical approach to calculating impedance of metallicmagnetic/conductor layered structures is developed. Thefrequency range considered extends to the ferromagneticresonance region of soft magnetic films (of the order of 1GHz). LÄS MER

4. 18. Alternative back contacts for CZTS thin film solar cells

   Författare :Sven Englund; Charlotte Platzer Björkman; Jonathan J. Scragg; Levent Gütay; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CZTS; thin film solar cells; back contacts; passivation; interface; titanium nitride; ATO; antimony-doped tin oxide; transparent back contact; CZTS; tunnfilmssolceller; bakkontakter; passivering; gränsskikt; mellanskikt; titannitrid; antimondopad tennoxid; ATO; transparent bakkontakt; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

   Sammanfattning : In this thesis, alternative back contacts for Cu2ZnSnS4 (CZTS) thin film solar cells were investigated. Back contacts for two different configurations were studied, namely traditional single-junction cells with opaque back contacts and transparent back contacts for possible use in either tandem or bifacial solar cell configuration. LÄS MER

5. 19. Ink-jet printing of thin film transistors based on carbon nanotubes

   Författare :Jiantong Li; Shi-Li Zhang; Håkan Olin; Muhammad Ashraful Alam; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Single-walled carbon nanotube; thin film transistor; ink-jet printing; Monte Carlo simulation; stick percolation; composite network; flexible electronics; Electronics; Elektronik;

   Sammanfattning : The outstanding electrical and mechanical properties of single-walled carbon nanotubes (SWCNTs) may offer solutions to realizing high-mobility and high-bendability thin-film transistors (TFTs) for the emerging flexible electronics. This thesis aims to develop low-cost ink-jet printing techniques for high-performance TFTs based on pristine SWCNTs. LÄS MER

7. 20. Defect Engineering in Kesterite Materials for Thin Film Solar Cells

   Författare :Katharina Rudisch; Jonathan J. Scragg; Alain Lafond; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CZTS; thin film solar cells; defect engineering; composition-spread films; order disorder transition; intrinsic defects; secondary phases; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

   Sammanfattning : Cu2ZnSnS4 has great potential to be applied as an earth abundant and non-toxic absorber material in thin film solar cells, based on its suitable optical properties. However, several challenges have prevented the achievable efficiencies from exceeding 12.6 %, which is well below marketable efficiencies compared to competing solar cell technologies. LÄS MER