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  • 1
    Book
    Book
    Spannungen in abtauchenden Lithosphärenplatten nach Modellexperimenten (1979)
    Stuttgart
    Details
    UID:
    b3kat_BV002160098
    Format: 140 S. , Ill.
    Note: Stuttgart, Univ., Diss., 1979
    Language: German
    Keywords: Lithosphäre ; Plattentektonik ; Spannung ; Abtauen ; Spannung ; Hochschulschrift
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  • 2
    Microfilm
    Microfilm
    Untersuchung nichtlinear optischer Effekte an ultradünnen Schichten organischer Materialien (1990)
    Details
    UID:
    b3kat_BV002636382
    Format: 186 S. , graph. Darst.
    Note: Mikrofiche-Ausg.: 2 Mikrofiches : 24x , Mainz, Univ., Diss., 1990
    Language: Undetermined
    Keywords: Dünne Schicht ; Nichtlineare Optik ; Nichtlineare Optik ; Organische Verbindungen ; Hochschulschrift
    Author information: Neher, Dieter 1960-
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  • 3
    Online Resource
    Online Resource
    Polyfluorenes (2008)
    Berlin, Heidelberg : Springer Berlin Heidelberg
    Details
    UID:
    gbv_1647254426
    Format: Online-Ressource (digital)
    ISBN: 9783540687344
    Series Statement: Advances in Polymer Science 212
    Additional Edition: ISBN 9783540687337
    Additional Edition: Buchausg. u.d.T. Polyfluorenes Berlin : Springer, 2008 ISBN 9783540687337
    Language: English
    Subjects: Chemistry/Pharmacy
    RVK:
    VE 8000
    Keywords: Polyfluorene ; Aufsatzsammlung ; Aufsatzsammlung
    DOI: 10.1007/978-3-540-68734-4
    URL: Volltext
    URL: Cover
    URL: Einführung/Vorwort
    URL: Inhaltsverzeichnis
    URL: Volltext
    URL: Volltext
    URL: Volltext
    URL: Volltext
    URL: Volltext
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    Stabi Berlin
    UB Potsdam
  • 4
    Book
    Book
    Tuning interfacial properties in perovskite solar cells through defined molecular assemblies (2021)
    Potsdam
    Details
    UID:
    gbv_1804376728
    Format: vii, 157 Seiten , Illustrationen, Diagramme
    Content: In the frame of a world fighting a dramatic global warming caused by human-related activities, research towards the development of renewable energies plays a crucial role. Solar energy is one of the most important clean energy sources and its role in the satisfaction of the global energy demand is set to increase. In this context, a particular class of materials captured the attention of the scientific community for its attractive properties: halide perovskites. Devices with perovskite as light-absorber saw an impressive development within the last decade, reaching nowadays efficiencies comparable to mature photovoltaic technologies like silicon solar cells. Yet, there are still several roadblocks to overcome before a wide-spread commercialization of this kind of devices is enabled. One of the critical points lies at the interfaces: perovskite solar cells (PSCs) are made of several layers with different chemical and physical features. In order for the device to function properly, these properties have to be well-matched. This dissertation deals with some of the challenges related to interfaces in PSCs, with a focus on the interface between the perovskite material itself and the subsequent charge transport layer. [...]
    Note: Dissertation Universität Potsdam 2022
    Additional Edition: Erscheint auch als Online-Ausgabe Canil, Laura Tuning interfacial properties in perovskite solar cells through defined molecular assemblies Potsdam, 2021
    Language: English
    Keywords: Hochschulschrift
    URL: Inhaltsverzeichnis
    Author information: Neher, Dieter 1960-
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  • 5
    Book
    Book
    Non-langevin recombination in fullerene and non-fullerene acceptor solar cells (2022)
    Potsdam
    Details
    UID:
    gbv_1807923649
    Format: XII, 103 Seiten , Illustrationen, Diagramme
    Content: Organic solar cells (OSCs), in recent years, have shown high efficiencies through the development of novel non-fullerene acceptors (NFAs). Fullerene derivatives have been the centerpiece of the accepting materials used throughout organic photovoltaic (OPV) research. However, since 2015 novel NFAs have been a game-changer and have overtaken fullerenes. However, the current understanding of the properties of NFAs for OPV is still relatively limited and critical mechanisms defining the performance of OPVs are still topics of debate. In this thesis, attention is paid to understanding reduced-Langevin recombination with respect to the device physics properties of fullerene and non-fullerene systems. The work is comprised of four closely linked studies. The first is a detailed exploration of the fill factor (FF) expressed in terms of transport and recombination properties in a comparison of fullerene and non-fullerene acceptors. We investigated the key reason behind the reduced FF in the NFA (ITIC-based) devices which is faster non-geminate recombination relative to the fullerene (PCBM[70]-based) devices. [...]
    Note: Dissertation Universität Potsdam 2022
    Additional Edition: Erscheint auch als Online-Ausgabe Hosseini, Seyed Mehrdad Non-langevin recombination in fullerene and non-fullerene acceptor solar cells Potsdam, 2022
    Language: English
    Keywords: Hochschulschrift
    URL: Inhaltsverzeichnis
    Author information: Neher, Dieter 1960-
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  • 6
    Book
    Book
    Correlation between dynamic parameters and device performance of organic solar cells (2015)
    Potsdam
    Details
    UID:
    gbv_859344118
    Format: 129 Blätter , Illustrationen, Diagramme
    Content: Organic bulk heterojunction (BHJ) solar cells based on polymer:fullerene blends are a promising alternative for a low-cost solar energy conversion. Despite significant improvements of the power conversion efficiency in recent years, the fundamental working principles of these devices are yet not fully understood. In general, the current output of organic solar cells is determined by the generation of free charge carriers upon light absorption and their transport to the electrodes in competition to the loss of charge carriers due to recombination. The object of this thesis is to provide a comprehensive understanding of the dynamic processes and physical parameters determining the performance. A new approach for analyzing the characteristic current-voltage output was developed comprising the experimental determination of the efficiencies of charge carrier generation, recombination and transport, combined with numerical device simulations. Central issues at the beginning of this work were the influence of an electric field on the free …
    Note: Dissertation Universität Potsdam, Mathematisch-Naturwissenschaftliche Fakultät 2016
    Additional Edition: Erscheint auch als Online-Ausgabe Kniepert, Juliane Correlation between dynamic parameters and device performance of organic solar cells Potsdam, 2016
    Language: English
    Keywords: Organische Solarzelle ; Hochschulschrift
    URL: Inhaltsverzeichnis
    Author information: Neher, Dieter 1960-
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  • 7
    Book
    Book
    Spannungen in abtauchenden Lithosphärenplatten nach Modellexperimenten (1979)
    Details
    UID:
    gbv_424402114
    Format: 140 S. mit 94 Abb. 8"
    Note: Stuttgart, Univ., Fak. Geo- u. Biowiss., Diss
    Language: Undetermined
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  • 8
    Book
    Book
    Advancing charge selective contacts for efficient monolithic perovskite-silicon tandem solar cells (2019)
    Potsdam
    Details
    UID:
    gbv_1662947461
    Format: v, 155 Seiten , Illustrationen, Diagramme
    Content: Hybrid organic-inorganic perovskites are one of the most promising material classes for photovoltaic energy conversion. In solar cells, the perovskite absorber is sandwiched between n- and p-type contact layers which selectively transport electrons and holes to the cell’s cathode and anode, respectively. This thesis aims to advance contact layers in perovskite solar cells and unravel the impact of interface and contact properties on the device performance. Further, the contact materials are applied in monolithic perovskite-silicon heterojunction (SHJ) tandem solar cells, which can overcome the single junction efficiency limits and attract increasing attention. Therefore, all contact layers must be highly transparent to foster light harvesting in the tandem solar cell design. Besides, the SHJ device restricts processing temperatures for the selective contacts to below 200°C. A comparative study of various electron selective contact materials, all processed below 180°C, in n-i-p type perovskite solar cells highlights that selective contacts and their interfaces to the absorber govern the overall device performance. ...
    Note: Dissertation Universität Potsdam 2019
    Additional Edition: Erscheint auch als Online-Ausgabe Kegelmann, Lukas Advancing charge selective contacts for efficient monolithic Perovskite-silicon tandem solar cells Potsdam, 2019
    Language: English
    Keywords: Mehrfach-Solarzelle ; Perowskit ; Silicium ; Polyethylendioxythiophen ; Hybrides System ; Doppelschicht ; Organischer Stoff ; Anorganischer Stoff ; Hochschulschrift
    URL: Inhaltsverzeichnis
    Author information: Neher, Dieter 1960-
    Author information: Rech, Bernd 1967-
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  • 9
    Book
    Book
    Charge carrier recombination and open circuit voltage in organic solar cells : from bilayer-model systems to hybrid multi-junctions (2017)
    Potsdam
    Details
    UID:
    gbv_1011059754
    Format: VI, 144 Seiten , Diagramme, Illustrationen
    Content: Tremendous progress in the development of thin film solar cell techniques has been made over the last decade. The field of organic solar cells is constantly developing, new material classes like Perowskite solar cells are emerging and different types of hybrid organic/inorganic material combinations are being investigated for their physical properties and their applicability in thin film electronics. Besides typical single-junction architectures for solar cells, multi-junction concepts are also being investigated as they enable the overcoming of theoretical limitations of a single-junction. In multi-junction devices each sub-cell operates in different wavelength regimes and should exhibit optimized band-gap energies. It is exactly this tunability of the band-gap energy that renders organic solar cell materials interesting candidates for multi-junction applications. Nevertheless, only few attempts have been made to combine inorganic and organic solar cells in series connected multi-junction architectures. Even though a great diversity…
    Note: Dissertation Universität Potsdam 2017
    Additional Edition: Erscheint auch als Online-Ausgabe Roland, Steffen Charge carrier recombination and open circuit voltage in organic solar cells Potsdam, 2017
    Language: English
    Keywords: Organische Solarzelle ; Mehrschichtsystem ; Reihenschaltung ; Donator ; Fluor ; Dotierung ; Rekombination ; Hochschulschrift
    URL: Inhaltsverzeichnis
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  • 10
    Book
    Book
    Defect chemistry in halide perovskites : material characterisation and device integration (2020)
    Potsdam
    Details
    UID:
    gbv_1741170893
    Format: vi, 231 Seiten , Illustrationen, Diagramme
    Content: Metal halide perovskites have merged as an attractive class of materials for photovoltaic applications due to their excellent optoelectronic properties. However, the long term stability is a roadblock for this class of material’s industrial pathway. Increasing evidence shows that intrinsic defects in perovskite promote material degradation. Consequently, understanding defect behaviours in perovskite materials is essential to further improve device stability and performance. This dissertation, hence, focuses on the topic of defect chemistry in halide perovskites. The first part of the dissertation gives a brief overview of the defect properties in halide perovskite. Subsequently, the second part shows that doping methylammonium lead iodide with a small amount of alkaline earth metals (Sr and Mg) creates a higher quality, less defective material resulted in high open circuit voltages in both n-i-p and p-i-n architecture. It has been found that the mechanism of doping has two distinct regimes in which a low doping concentration enables ...
    Note: Dissertation Universität Potsdam 2020
    Additional Edition: Erscheint auch als Online-Ausgabe Phung, Thi Thuy Nga Defect chemistry in halide perovskites Potsdam, 2020
    Language: English
    Keywords: Metallhalogenide ; Perowskit ; Lichtinduzierter Defekt ; Hochschulschrift
    URL: Inhaltsverzeichnis
    Author information: Neher, Dieter 1960-
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