Sökning: "photo-degradation"

Hittade 4 avhandlingar innehållade ordet photo-degradation.

  1. 1. Materials and Device Engineering for Efficient and Stable Polymer Solar Cells

    Författare :Rickard Hansson; Ellen Moons; Andreas Opitz; Rene Janssen; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymer solar cell; photovoltaics; morphology; photo-degradation; conjugated polymer; fullerene; synchroton-based techniques; hole transport layers; Physics; Fysik;

    Sammanfattning : Polymer solar cells form a promising technology for converting sunlight into electricity, and have reached record efficiencies over 10% and lifetimes of several years. The performance of polymer solar cells depends strongly on the distribution of electron donor and acceptor materials in the active layer. LÄS MER

  3. 2. Morphology and material stability in polymer solar cells

    Författare :Rickard Hansson; Ellen Moons; Andreas Opitz; Mats Fahlman; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymer solar cell; photovoltaics; morphology; photo-degradation; conjugated polymer; fullerene; synchroton-based techniques; Physics; Fysik;

    Sammanfattning : Polymer solar cells are promising in that they are inexpensive to produce, and due to their mechanical flexibility have the potential for use in applications not possible for more traditional types of solar cells. The performance of polymer solar cells depends strongly on the distribution of electron donor and acceptor material in the active layer. LÄS MER

  4. 3. Reactive dissolved organic carbon dynamics in a changing environment : Experimental evidence from soil and water

    Författare :Balathandayuthabani Panneer Selvam; Institutionen för naturgeografi och ekosystemvetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dissolved organic carbon; DOC; Photodegradation; Biodegradation; DOC reactivity;

    Sammanfattning : Dissolved organic carbon (DOC) is the major form of organic carbon in aquatic ecosystems. Biological and photochemical degradation of DOC are major causes of greenhouse gas emissions from aquatic ecosystems. LÄS MER

  5. 4. Durability of timber members : Moisture conditions and service life assessment of bridge detailing

    Författare :Jonas Niklewski; Avdelningen för Konstruktionsteknik; []
    Nyckelord :wood; spruce; moisture; durability; decay; service life; detailing; model;

    Sammanfattning : The longevity of timber structures in exposed outdoor environments is often perceived to be unreliable as compared with that of concrete and steel structures. This situation is exacerbated to some extent by the fact that the European commission for standardization (CEN) currently provides no quantitative method for service life assessment of timber structures. LÄS MER