Essays about: "fullerene"

Showing result 1 - 5 of 22 essays containing the word fullerene.

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. re.BO.rn - Non-visual biometric response to polarized and non-polarized lights and their effect on sleep pattern

   University essay from KTH/Ljusdesign

   Author : Jelena Popov Abouhanian; [2022]
   Keywords : CircadianRhythm SleepQuality Non-VisualEttectsOfLight PolarisedFilters SelfReportedResearch;

   Abstract : Obliged to respect the newly established regulations during COVID-19,  people worldwide had been forced for an extended period to a 24/7 stay at home. Due to the lack of movement, daylight, and fresh air, anxiety, depression, bad mood, sleep disorders, etc., could have been noticed in humans. READ MORE

4. 3. Computational Prediction Of Efficiency Parameters In Organic Solar Cells : From Polymer Donors And Non Fullerene Acceptors

   University essay from Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper (from 2013)

   Author : Martin Karlsson; [2022]
   Keywords : Organic solar cells; computational chemistry; DFT.;

   Abstract : The field of organic solar cells is getting more and more attention as the need forrenewable energy sources rises. When developing new materials for organic solar cellssynthesizing the new materials, is a time consuming and costly process. READ MORE

5. 4. 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

6. 5. Modifying Silica with Corannulene Derivatives : Preparing stationary phase using click reaction to separate fullerene mixtures

   University essay from Umeå universitet/Kemiska institutionen

   Author : Thuy-Tran Ho-Thi; [2020]
   Keywords : ;

   Abstract : .... READ MORE