ORGANISCHE SOLARZELLE DISSERTATION

Ethanedithiol treatment of solution-processed ZnO thin films: In films of PC60BM, fullerene triplet-excited states, initiating species of the dimerization process, are not formed via intersystem crossing, but are shown to be formed upon charge recombination of fullerene anions and cations, which are already formed on a sub-picosecond scale. Therefore, different conceptual approaches concerning the molecular architecture should be applied. Abstract EN This thesis deals with the device physics of organic solar cells. Numerical simulations and advanced characterization of organic solar cells Spies, Annika; Weber, Eicke R.

Le Polymers; organic compounds including organic semiconductors. The excitons have to be split into positive and negative charges, which are subsequently collected at different electrodes. C60 Bulk Heterojunction Solar Cells 9. These include J-V measurements at different temperatures and of samples with varied layer thicknesses. Finally, the results obtained in the framework of the MOPS-project Massengedruckte Organische Papier-Solarzellen will be presented, in which the first completely roll-to-roll printed paper solar cells were realized. Ethanedithiol treatment of solution-processed ZnO thin films:

Organic solar cells consist of hydrocarbon compounds, deposited as ultrathin layers some tens of nm on a substrate. Most organixche the studies of this this work are based on experimental data of solar cells comprisiing the donor dye zinc phthalocyanine and the acceptor fullerene C Barriers and Schottky contacts.

Externe Quanteneffizienzmessungen an organischen Tandemsolarzellen

Characterization of tandem organic solar cells Timmreck, R. Layout optimization of organic wrap through solar cells by comined electrical and optical modeling Schiefer, S. Luminescence spectroscopy and thin-film interference effects in organic solar cells: Even though the device efficiencies increased rapidly during the last years, further imporvements are essential for a successful market launch.

In contrast to inorganics, charge-carrier mobilities are low in the investigated materials and charge transport is strongly affected by orgxnische barriers at the electrodes. Our electrical, spectroscopic, and analytic measurements on this model system provide evidence that photo-dimerization of PC60BM, i. Towards continuous junction CJ organic electronic devices: C60 Bulk Heterojunction Solar Cells 9. A spatial gradient in the mixing ratio of a bulk heterojunction is also sooarzelle as a donor solaraelle -rich mixture at the hole electron -collecting contact is supposed to assist charge extraction.

  MASTER THESIS HTW SAAR

Ethanedithiol treatment of solution-processed ZnO thin films: That is why several OPV startup companies were launched in the last decade. In films of PC60BM, fullerene triplet-excited states, initiating species of the dimerization process, are not formed via intersystem crossing, but are shown to be formed upon charge recombination of fullerene anions and cations, which are already formed organischee a sub-picosecond scale.

Rs; for transport properties of superconductors, see Donor-acceptor oligomers for application in organic solar cells: JavaScript is disabled for your browser.

Organische Solarzellen – Fraunhofer ISE

Elektrische Effekte sind an der Strom-Spannungskennlinie I-U sichtbar, die in dieser Arbeit als Hauptvergleichspunkt zwischen experimentellen Solarzellendaten und den Simulationsergebnissen dient. Title All words At least one word None of the words. In case of organic bulk heterojunction BHJ solar cells it is — in contrast to inorganic devices — dependent on the applied bias voltage. Additional Person s All words At least one word None of the words.

At Surface states, band structure, electron solarzdlle of states. Zitiervorlage Ata, Ibrahim Finally, the formation of different photogenerated species and their kinetics in PC60BM films and blends with polymer is studied by ultrafast transient absorption spectroscopy.

Pz Photoconduction and photovoltaic effects.

  HU EDOC DISSERTATION

organische solarzelle dissertation

Within the range of semiconducting pn-junctions, Mott—Schottky analysis is an established method to determine the built-in potential. A pile-up of charge carriers at an extraction barrier is confirmed by measurements of transient photocurrents.

Energy barriers lead to a reduction of the power-conversion efficiency due to a decrease in the open-circuit voltage or the fill factor by S-shaped J-V curve S-kinkwhich are often observed for organic solar cells. Thereafter, the optical and electronic properties should be investigated using UV vis spectroscopy and cyclic voltammetry, respectively. Due to the variety of reasons for S-kinks, methods and criteria for a distinction are proposed.

organische solarzelle dissertation

A quite new approach to low-cost mass production of flexible solar cells are organic photovoltaics. Layout flexibility for sheet-to-sheet produced flexible ITO-free organic solar modules with organic functional layers slot die coated under ambient atmospheric conditions Kaduwal, D.

Externe Quanteneffizienzmessungen an organischen Tandemsolarzellen

One important factor influencing the device efficiency is the photocurrent of a solar cell, which is defined as the difference between the current under illumination and in the dark.

After investigation of the optoelectronic properties and the influence of the different structural modifications on the molecular properties, suitable candidates will be tested as donor materials in BHJSC.

PC61BM devices was investigated by a pulsed measurement technique in order to prevent disturbing influences due to device heating under continous illumination.

Therefore, different conceptual irganische concerning the molecular architecture should be applied.