Search for dissertations about: "charge compensation"

Showing result 16 - 20 of 27 swedish dissertations containing the words charge compensation.

2. 16. Probing nonlinear electrical properties at the nanoscale : Studies in multifrequency AFM

   Author : Riccardo Borgani; David B. Haviland; Peter Grütter; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Atomic Force Microscopy; Nonlinear dynamics; Multifrequency; Contact potential difference; Conductance; Fast dynamics; Fysik; Physics;

   Abstract : Nanostructured materials promise great advances in diverse and active research fields such as energy harvesting and storage, corrosion prevention and high-density memories. Electrical characterization at the nanometer scale is key to understanding and optimizing the performance of these materials, and therefore central to the progress of nanotechnology. READ MORE

4. 17. Design and characterization of 64K pixels chips working in single photon processing mode

   Author : Xavier Llopart Cudié; Christer Fröjdh; Michael Campbell; Mittuniversitetet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Elektronik;

   Abstract : Progress in CMOS technology and in fine pitch bump bonding has made possible the development of high granularity single photon counting detectors for X-ray imaging. This thesis studies the design and characterization of three pulse processing chips with 65536 square pixels of 55 μm x 55 μm designed in a commercial 0. READ MORE

5. 18. Investigating ageing mechanisms in electric vehicle batteries : A multiscale approach to material analysis

   Author : Anastasiia Mikheenkova; Maria Hahlin; Matthew Lacey; Cesar Pay Gómez; Sandrine Lyonnard; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Li-ion batteries; Ni-rich cathode; Ageing mechanisms; Batteries for electric vehicles; X-ray diffraction; NCA; NMC811; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

   Abstract : Electrifying passenger transport is a key strategy in combating global warming, with Li-ion batteries (LIBs) being the current go-to technology. Despite LIB’s satisfactory performance and carbon-neutral operation, lifetime and safety are still public concerns. READ MORE

6. 19. Electronic Properties of Diamond

   Author : Markus Gabrysch; Jan Isberg; Mats Leijon; Johan Hammersberg; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; CVD diamond; wide-bandgap semiconductor; time-of-flight; pair-creation energy; electronic devices; detector; Elektronik; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik; Electricity; Esp The Study Of Transients and Discharges; elektricitetslära; ssk studiet av transienter och urladdning;

   Abstract : Diamond is a semiconductor with many superior material properties such as high breakdown field, high saturation velocity, high carrier mobilities and the highest thermal conductivity of all materials. These extreme properties compared to other (wide bandgap) semiconductors make it desirable to develop single-crystalline epitaxial diamond films for many electronic device and detector applications. READ MORE

7. 20. Electron Paramagnetic Resonance studies of negative-U centers in AlGaN and SiC

   Author : Xuan Thang Trinh; Nguyen Tien Son; Erik Janzén; Jan Stehr; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Silicon (Si) is the most commonly used n-type dopant in AlGaN, but the conductivity of Si-doped AlxGa1-xN was often reported to drop abruptly at high Al content (x>0.7) and the reason was often speculated to be due to either compensation by deep levels or self-compensation of the so-called DX (or negative-U) center. READ MORE