Essays about: "nfa"

Found 5 essays containing the word nfa.

  1. 1. Photophysics of the polymer acceptor PF5-Y5 in organic photovoltaics : A first principles theory based study

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Anton Almén; [2022]
    Keywords : PF5-Y5; Non-fullerene-acceptor; NFA; polymer; fundamental; optical; gap; oxidation; reduction; exciton; binding; energy; oligomer; length; PF5-Y5; Non-fullerene-acceptor; NFA; polymer; fundamentalt; optiskt; gap; oxidation; reduktion; exciton; binding; energi; oligomerlängd;

    Abstract : Non-fullerene Acceptors (NFAs) have gathered a great deal of interest for use inorganic photovoltaics (OPVs) due to recent breakthroughs in their power conversion efficiency and other advantages they offer over their Fullerene-based counterparts. In this work, a new promising non-fullerene polymer acceptor, PF5-Y5, have been studied using density functional theory and time-dependent density functional theory; and the effects that oligomer length, geometry relaxation and exchange-correlation interaction has on the exciton binding energies (the difference between optical and fundamental energy gaps) have been investigated. READ MORE

  3. 2. Charge transfer states at polymer solar cell interfaces : Insights from atomic-scale modeling

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Rickard Svensson; [2022]
    Keywords : organic solar cells; OSC; polymer; interface; charge transfer; non-fullerene acceptor; PYT; PBDB-T; DFT; TD-DFT; conformation; alkyl groups; methylation; HOMO; LUMO; FMO; NTO; UV-Vis; DOS; exciton; exciton binding energy; dipole moment; open-circuit voltage; organiska solceller; OSC; polymer; gränssnitt; laddningsöverföring; icke-fullerenacceptor; PYT; PBDB-T; DFT; TD-DFT; konformation; alkylgrupper; metylering; HOMO; LUMO; FMO; NTO; UV-Vis; DOS; exciton; excitonbindningsenergi; dipolmoment; tomgångsspänning;

    Abstract : Organic solar cells (OSCs) based on non-fullerene acceptors (NFAs) have attracted a great deal of attention in recent years due to their rapidly increasing efficiency and enormous potential. In this work, the optical and electronic properties of systems containing the very promising non-fullerene acceptor PYT have been thoroughly studied with the use of the density functional theory (DFT) and the time-dependent density functional theory (TDDFT). READ MORE

  4. 3. Is there a win for conservation, livelihoods and governance? : the implications of Broussonetia papyrifera as an ecological resource substitute: a field study in Uganda

    University essay from SLU/Dept. of Urban and Rural Development

    Author : Yasmin Stoderegger; [2018]
    Keywords : biodiversity; Broussonetia papyrifera; Mabira Central Forest Reserve; forest regeneration; community involvement; resource substitution;

    Abstract : Wood extraction and invasive species are commonly perceived as harmful for ecosystem services and detrimental for conservation efforts. However, they can also be beneficial for forests as well as for local communities. Interactions among economic, institutional and ecological factors may in some cases turn these impacts on their head. READ MORE

  5. 4. Automotive Fleet Sales Management

    University essay from Lunds universitet/Produktionsekonomi

    Author : Jakob Olsson; Gustav Westling; [2016]
    Keywords : Fleet sales; fleet cars; company cars; management; internal best practices; organizational learnings; business sales strategy; NFA; LeaseCo; automotive industry; trend analysis; future best practices; digitalization connectivity; omni-channel; WLTP; customer and vehicle data; online sales; direct sales; B2B; B2C; dealerships; CRM; business model disruption; Technology and Engineering;

    Abstract : Background The Master’s Thesis Case Study Company is a premium brand automotive OEM. In the Swedish fleet car (or company car) market, the company is lagging behind its main competitors in terms of market share a fact that is not true for several other European markets. READ MORE

  6. 5. Att servera en näringsriktig måltid i skolan - med focus på mjölkprodukter

    University essay from SLU/Dept. of Food Science

    Author : Lisa Skogsberg; [2014]
    Keywords : grundskola; skolmat; offentlig måltid; näringsriktig; mjölk;

    Abstract : Enligt den svenska skollagen (SFS 2010:800) har elever i skolan rätt till näringsriktiga skolmåltider. I lagtexten saknas förklaring om vad den näringsriktiga måltiden innebär, men regeringen hänvisar till de svenska näringsrekommendationerna som utgångspunkt. READ MORE