ISBN: 9786202320245 - improved materials and electronic properties of organic solar cells (5 resultados)

Taschenbuch. Condición: Neu. Improved materials and electronic properties of organic solar cells | Stefan Kraner | Taschenbuch | 152 S. | Englisch | 2019 | Südwestdeutscher Verlag für Hochschulschriften | EAN 9786202320245 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu. …

Taschenbuch. Condición: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In current organic photovoltaic devices, the loss in energy caused by the inevitable charge transfer step leads to a low open circuit voltage, which is one of the main reasons for rather low power conversion efficiencies. A possible approach to increase the voltage is to lower the exciton binding energy, which can be accomplished by materials with a higher dielectric constant. It is shown how to calculate the dielectric constant with ionic and electronic contributions and how to obtain the exciton binding energy by using the density functional theory framework. We obtain a lower limit of the exciton binding energy for different commonly used one dimensional molecules, and an improved dielectric constant for a ladder polymer with polar side-chains. Different arrangements of a donor and an acceptor molecules are discussed in terms of the exciton binding energy of the respective charge transfer state. It is shown that a spatial separation between the donor and acceptor molecule can lower the exciton binding energy by a factor of two. 152 pp. Englisch.…

Condición: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Kraner StefanDr. Stefan Kraner studied Electronic Engineering and Micro- and Nanotechnology in Switzerland and Austria, respectively. He conducted his Masterthesis under supervision of Prof. Sariciftci and his PhD in the group of Pro.…

Taschenbuch. Condición: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - In current organic photovoltaic devices, the loss in energy caused by the inevitable charge transfer step leads to a low open circuit voltage, which is one of the main reasons for rather low power conversion efficiencies. A possible approach to increase the voltage is to lower the exciton binding energy, which can be accomplished by materials with a higher dielectric constant. It is shown how to calculate the dielectric constant with ionic and electronic contributions and how to obtain the exciton binding energy by using the density functional theory framework. We obtain a lower limit of the exciton binding energy for different commonly used one dimensional molecules, and an improved dielectric constant for a ladder polymer with polar side-chains. Different arrangements of a donor and an acceptor molecules are discussed in terms of the exciton binding energy of the respective charge transfer state. It is shown that a spatial separation between the donor and acceptor molecule can lower the exciton binding energy by a factor of two.…

Taschenbuch. Condición: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In current organic photovoltaic devices, the loss in energy caused by the inevitable charge transfer step leads to a low open circuit voltage, which is one of the main reasons for rather low power conversion efficiencies. A possible approach to increase the voltage is to lower the exciton binding energy, which can be accomplished by materials with a higher dielectric constant. It is shown how to calculate the dielectric constant with ionic and electronic contributions and how to obtain the exciton binding energy by using the density functional theory framework. We obtain a lower limit of the exciton binding energy for different commonly used one dimensional molecules, and an improved dielectric constant for a ladder polymer with polar side-chains. Different arrangements of a donor and an acceptor molecules are discussed in terms of the exciton binding energy of the respective charge transfer state. It is shown that a spatial separation between the donor and acceptor molecule can lower the exciton binding energy by a factor of two.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 152 pp. Englisch.…