Sökning: "Bulk heterojunction"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden Bulk heterojunction.

  1. 1. Stability of Bulk-heterojunction blends for Solar Cell Applications

    Författare :Camilla Lindqvist; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanostructure; PCBM crystallisation; bulk-heterojunction; Polymer solar cells; stability;

    Sammanfattning : Polymer solar cells are a promising alternative to more traditional silicon solar cells. This is mainly due to the good solubility of organic semiconductors, which makes it possible to produce large-scale and mechanically flexible devices with roll-to-roll processes. LÄS MER

  2. 2. Studies of Charge Transport and Energy Level in Solar Cells Based on Polymer/Fullerene Bulk Heterojunction

    Detta är en avhandling från Institutionen för fysik, kemi och biologi

    Författare :Abay Gadisa; Linköpings universitet.; Linköpings universitet.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bulk heterojunction; Charge transport; Space charge limited; Bipolar transport; Origin of open circuit voltage; Polymer-fullerene blend; Soft contact lamination; Polarized infrared emission; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Sammanfattning : π-Conjugated polymers have attracted considerable attention since they are potential candidates for various opto-electronic devices such as solar cells, light emitting iodes, photodiodes, and transistors. Electronic de vices based on conjugated polymers can be easily processed at low temperature using inexpensive technologies. LÄS MER

  3. 3. Materials aspects in spin-coated films for polymer photovoltaics

    Detta är en avhandling från Karlstad : Karlstads universitet

    Författare :Ana Sofia Anselmo; Karlstads universitet.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; materials science; photovoltaics; conjugated polymer; polymer solar cell; bulk heterojunction; coating; morphology; fullerene; photostability; degradation; X-ray absorption spectroscopy; synchroton-based techniques; Materialvetenskap; Materialvetenskap;

    Sammanfattning : Polymer-based photovoltaics have the potential to contribute to boosting photovoltaic energy conversion overall. Besides allowing large-area inexpensive processing, polymeric materials have the added benefit of opening new market applications for photovoltaics due to their low-weight and interesting mechanical properties. LÄS MER

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

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Zaifei Ma; Linköpings universitet.; Linköpings universitet.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : 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. LÄS MER

  5. 5. Device design and process integration for SiGeC and Si/SOI bipolar transistors

    Detta är en avhandling från Kista : Mikroelektronik och informationsteknik

    Författare :Erik Haralson; KTH.; [2004]
    Nyckelord :Silicon-Germanium SiGe ; SiGeC; heterojunction bipolar transistor HBT ; nickel silicide; selectively implanted collector SIC ; device simulation; SiGeC layer staiblity; high resolution x-ray diffraction HRXRD ; silicon-on.insulator SOI ; self-heating;

    Sammanfattning : SiGe is a significant enabling technology for therealization of integrated circuits used in high performanceoptical networks and radio frequency applications. In order tocontinue to fulfill the demands for these applications, newmaterials and device structures are needed. LÄS MER