Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 50 Issue 15

Special Issue: Special Issue on Polymer Electronics

1 August 2012

Volume 50, Issue 15

Pages i–iv, 1013–1144

Issue edited by: Dhandapani Venkataraman, Thomas P. Russell

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Editorials
    4. Perspectives
    5. Reviews
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      Cover Image, Volume 50, Issue 15 (pages i–ii)

      Article first published online: 19 JUN 2012 | DOI: 10.1002/polb.23117

      Thumbnail image of graphical abstract

      In this special issue on Polymer Electronics, polymer-based electronics and photovoltaics are reviewed to provide the reader with a sense of how the field has developed, where things stand at present, and what possibilities are looming in the future. Expertise in areas ranging from synthesis to morphology to device design was sought, and the results provide a snapshot of the field at present and give some sense of the key impediments in the field. The cover image shows a representation of a bulk heterojunction wherein excitons, generated in the photoactive polymer (electron donor), are dissociated at an interface with an electron accepting material. Electron microscopy images of actual samples surround this schematic.

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      Inside Cover, Volume 50, Issue 15 (pages iii–iv)

      Article first published online: 19 JUN 2012 | DOI: 10.1002/polb.23118

      Thumbnail image of graphical abstract

      The image shows a representation of electronic circuitry featuring a prominent transistor and interconnections. The chemical structure inside the transistor represents a prototypical high performing n-channel (electron transporting) organic semiconductor, N,N-bis(1H,1H-perfluorooctyl)naphthalene-1,4,5,8-tetracarboxylic diimide, fromwhich n-channel field-effect transistors may be constructed. Such transistors, including material design, processing, and stabilization, are the subject of the review on page 1090 by Srinivas Kola, Jasmine Sinha, and Howard E. Katz.

  2. Editorials

    1. Top of page
    2. Cover Image
    3. Editorials
    4. Perspectives
    5. Reviews
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      Polymer electronics: Power from polymers (page 1013)

      Dhandapani Venkataraman and Thomas P. Russell

      Article first published online: 19 JUN 2012 | DOI: 10.1002/polb.23107

  3. Perspectives

    1. Top of page
    2. Cover Image
    3. Editorials
    4. Perspectives
    5. Reviews
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      Organic photovoltaics: Challenges and opportunities (pages 1014–1017)

      Russell Gaudiana

      Article first published online: 23 APR 2012 | DOI: 10.1002/polb.23083

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      Challenges remain on the road to manufacturing stable, high-performance organic photovoltaic modules in high volume at low cost. The major challenges are centered on stability to high-intensity solar radiation, which represents one of the many accelerated aging tests, and module efficiency. Several of the underlying problems for both of these will be discussed in the text, and some will be addressed in detail in the following papers.

  4. Reviews

    1. Top of page
    2. Cover Image
    3. Editorials
    4. Perspectives
    5. Reviews
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      On the morphology of polymer-based photovoltaics (pages 1018–1044)

      Feng Liu, Yu Gu, Jae Woong Jung, Won Ho Jo and Thomas P. Russell

      Article first published online: 23 MAR 2012 | DOI: 10.1002/polb.23063

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      Polymer-based photovoltaics attract much attention due to their promising applications. In this review, we focus on the morphology study of polymer solar cells. Different categories of conjugated polymers and their blends with fullerene derivatives are discussed. Several key parameters such as crystallinity, miscibility, size of phase separation, and vertical phase segregation that determines the morphology and device performance are analyzed. These understandings of morphology will help material scientists to further increase the performance of plastic solar cells.

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      Strategies for controlling the active layer morphologies in OPVs (pages 1045–1056)

      Gavvalapalli Nagarjuna and Dhandapani Venkataraman

      Article first published online: 19 APR 2012 | DOI: 10.1002/polb.23073

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      The past five years has witnessed an explosive growth in the area of organic photovoltaic cells (OPVs) research. This review looks at approaches to active layer morphologies, using strategies derived from in-depth understanding. A variety of methods to study the evolution of active layer morphologies are covered, along with strategies including the use of small molecule additives, polymer nanowires and polymer nanoparticles to realize improved active layer morphologies.

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      Incremental optimization in donor polymers for bulk heterojunction organic solar cells exhibiting high performance (pages 1057–1070)

      Mayank Mayukh, In Hwan Jung, Feng He and Luping Yu

      Article first published online: 7 JUN 2012 | DOI: 10.1002/polb.23102

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      Significant improvement in the organic solar cell device efficiency has been achieved due to the development of low band-gap polymers with tunable electron affinity, ionization potential, solubility, and miscibility with the fullerene acceptor, and improved understanding of the factors affecting the critical device parameters such as the VOC and the JSC. This review examines the latest strategies, results, and trends that have evolvedin the design of solar cells with better efficiency and durability.

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      Can computational approaches aid in untangling the inherent complexity of practical organic photovoltaic systems? (pages 1071–1089)

      Bobby G. Sumpter and Vincent Meunier

      Article first published online: 19 APR 2012 | DOI: 10.1002/polb.23075

      Thumbnail image of graphical abstract

      Organic-based photovoltaic materials have received considerable attention in recent years in part because of their potentially low manufacturing cost, compatibility with flexible substrates, diverse chemical tunability, scalability, and ease of processing currently available for bulk heterojunction construction. Unfortunately, combinations of physicochemical and device complexities have led to difficulties obtaining power conversion efficiencies beyond 9%. In this review article, we provide an overview of some of the recent progress toward implementing theory, modeling, and simulation approaches in combination with results from precision synthesis, characterization, and device fabrication for understanding the inherent properties and performance of some popular organic photovoltaic materials.

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      Organic transistors in the new decade: Toward n-channel, printed, and stabilized devices (pages 1090–1120)

      Srinivas Kola, Jasmine Sinha and Howard E. Katz

      Article first published online: 23 FEB 2012 | DOI: 10.1002/polb.23054

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      Significant progress has been made in designing organic semiconducting materials (OSCs) in the past few decades for organic field-effect transistors (OFETs). Much attention has been paid to the development of p-channel OSCs, with less but highly significant progress on n-channel OSCs. In this review, the focus is on advances made with OFETs in the last few years to achieve high performance in n-channel modes, air stability, and solution processability, leading to printable active electronics.

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      Optical probes of chain packing structure and exciton dynamics in polythiophene films, composites, and nanostructures (pages 1121–1129)

      Michael D. Barnes and Mina Baghar

      Article first published online: 14 JUN 2012 | DOI: 10.1002/polb.23105

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      This mini-review highlights recent work in the photophysics of polythiophene films and nanostructures (nanoparticles and nanofibers). Photo-induced exciton production and subsequent decay or dissociation dynamics are closely tied to aggregate packing structure, fueling an intense research effort focused on novel materials and optical methods to yield a molecular-level understanding of this connection.

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      Techniques for characterization of charge carrier mobility in organic semiconductors (pages 1130–1144)

      Akshay Kokil, Ke Yang and Jayant Kumar

      Article first published online: 8 JUN 2012 | DOI: 10.1002/polb.23103

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      The charge transport characteristics of organic semiconductors are one of the key attributes that impacts the performance of organic semiconductors in organic photovoltaic cells, light emitting diodes and field effect transistors. In this review, techniques for measuring the charge carrier mobility using space charge limited current, time of flight, carrier extraction by linearly increasing voltage, double injection, field effect transistors and impedance spectroscopy are discussed.

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