Search for dissertations about: "heterojunction"

Showing result 16 - 20 of 76 swedish dissertations containing the word heterojunction.

2. 16. Graphene Hot-electron Transistors

   Author : Sam Vaziri; Mikael Östling; Max Lemme; Suman Datta; KTH; []
   Keywords : Graphene; hot-electron transistors; graphene base transistors; GBT; cross-plane carrier transport; tunneling; ballistic transport; heterojunction transistors; graphene integration; graphene transfer; Informations- och kommunikationsteknik; Information and Communication Technology;

   Abstract : Graphene base transistors (GBTs) have been, recently, proposed to overcome the intrinsic limitations of the graphene field effect transistors (GFETs) and exploit the graphene unique properties in high frequency (HF) applications. These devices utilize single layer graphene as the base material in the vertical hot-electron transistors. READ MORE

4. 17. Numerical modelling of hot electron transport in Schottky-diodes and heterojunction structures

   Author : Hans Hjelmgren; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; n-GaAs; ; energy balance equations; dc-properties;

   Abstract : A one-dimensional drift-diffusion model, including energy balance equations, is used to model Schottky-diodes and heterojunction structures. The set of equations are solved simultaneously with a finite-difference iterative scheme. READ MORE

5. 18. Studies of Morphology and Charge-Transfer in Bulk-Heterojunction Polymer Solar Cells

   Author : Zaifei Ma; Fengling Zhang; Olle Inganäs; Ludvig Edman; Linköpings universitet; []
   Keywords : ;

   Abstract : The work presented in this thesis focuses on the two critical issues of bulk-heterojunction polymer solar cells: morphology of active layers and energy loss during charge transfer process at electron donor/acceptor interfaces. Both issues determine the performance of polymer solar cells through governing exciton dissociation, charge carrier recombination and free charge carrier transport. READ MORE

6. 19. Design, fabrication and evaluation of high-speedIII/V-based heterojunction bipolar transistors

   Author : Bo Willén; KTH; []
   Keywords : ;

   Abstract : .... READ MORE

7. 20. Lighting and Sensing Applications of Nanostructured ZnO, CuO and Their Composites

   Author : Ahmed ELtahir Elsharif Zainelabdin; Magnus Willander; Omer Nour; Leonard J. Brillson; Linköpings universitet; []
   Keywords : ZnO; CuO; Nanostructures; Composites; ZnO polymer LEDs; humidity sensor; p-n heterojunction;

   Abstract : Low dimensional nanostructures of zinc oxide (ZnO), cupric oxide (CuO), and their composite nanostructures possess remarkable physical and chemical properties. Fundamental understanding and manipulation of these unique properties are crucial for all potential applications. READ MORE