Advanced Materials

Cover image for Vol. 25 Issue 13

Special Issue: Organic Electronics

April 4, 2013

Volume 25, Issue 13

Pages 1805–1954

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
    1. You have free access to this content
      Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation (Adv. Mater. 13/2013) (page 1805)

      Kang Wei Chou, Buyi Yan, Ruipeng Li, Er Qiang Li, Kui Zhao, Dalaver H. Anjum, Steven Alvarez, Robert Gassaway, Alan Biocca, Sigurdur T. Thoroddsen, Alexander Hexemer and Aram Amassian

      Version of Record online: 2 APR 2013 | DOI: 10.1002/adma.201370082

      Thumbnail image of graphical abstract

      Spin-coating is extensively used in the lab-based manufacture of organic solar cells, including most of the record-setting cells. Aram Amassian and co-workers report on p. 1923 the first direct observation of photoactive layer formation as it occurs during spin-coating. The study provides new insight into mechanisms and kinetics of bulk heterojunction formation, which may be crucial for successful transfer to printing processes and scale-up.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
    1. You have free access to this content
      Microfluidics: Segmented Flow Reactors for Nanocrystal Synthesis (Adv. Mater. 13/2013) (page 1806)

      Adrian M. Nightingale and John C. deMello

      Version of Record online: 2 APR 2013 | DOI: 10.1002/adma.201370083

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      Microreactors are a compelling technology for the highly controlled synthesis of colloidal nanocrystals. Use of segmented flow, where the reaction occurs within a train of discrete slugs or droplets, offers important advantages over alternative synthesis methods, including improved reaction control and robust, reliable operation. The Progress Report by John C. deMello and Adrian M. Nightingale on p. 1813 describes the operation of segmented flow microreactors, their application to the controlled synthesis of nanocrystals, and the principal obstacles to their successful exploitation.

  3. Masthead

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
    1. Masthead: (Adv. Mater. 13/2013)

      Version of Record online: 2 APR 2013 | DOI: 10.1002/adma.201370084

  4. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
  5. Editorial

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
    1. You have free access to this content
      Organic Electronics (pages 1811–1812)

      Iain McCulloch

      Version of Record online: 2 APR 2013 | DOI: 10.1002/adma.201205216

  6. Progress Report

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
    1. Segmented Flow Reactors for Nanocrystal Synthesis (pages 1813–1821)

      Adrian M. Nightingale and John C. deMello

      Version of Record online: 8 NOV 2012 | DOI: 10.1002/adma.201203252

      Thumbnail image of graphical abstract

      Segmented flow microreactors are a compelling technology for the controlled synthesis of colloidal nanocrystals, offering multiple advantages over traditional batch synthesis. This Progress Report reviews the operation of segmented flow microreactors, their application to the controlled synthesis of nanocrystals, and some of the principal challenges that must be addressed before they can become a mainstream technology for the controlled production of nanomaterials.

  7. Reviews

    1. Top of page
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    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
    1. Electrolyte-Gated Transistors for Organic and Printed Electronics (pages 1822–1846)

      Se Hyun Kim, Kihyon Hong, Wei Xie, Keun Hyung Lee, Sipei Zhang, Timothy P. Lodge and C. Daniel Frisbie

      Version of Record online: 2 DEC 2012 | DOI: 10.1002/adma.201202790

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      This Review discusses recent progress in electrolyte-gated transistors (EGTs). EGTs employ a high-capacitance electrolyte as the gate insulator layer, which affords low voltage operation and high drive currents. The Review covers EGT operation mechanisms, the development of new solid electrolyte materials for use in EGTs and emerging applications of these devices in printed digital circuits, flexible displays, biosensors, and fundamental transport measurements.

    2. Factors Limiting Device Efficiency in Organic Photovoltaics (pages 1847–1858)

      René A. J. Janssen and Jenny Nelson

      Version of Record online: 6 DEC 2012 | DOI: 10.1002/adma.201202873

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      The power conversion efficiency of donor-acceptor organic solar cells now reaches over 10% in single-junction and tandem cells. Empirical models suggest that the maximum efficiency may be limited at 10–12%, yet recent, more refined detailed-balance models indicate that, under favorable conditions, efficiencies in the range of 20–24% can be achieved.

    3. Recent Advances in the Development of Semiconducting DPP-Containing Polymers for Transistor Applications (pages 1859–1880)

      Christian B. Nielsen, Mathieu Turbiez and Iain McCulloch

      Version of Record online: 25 SEP 2012 | DOI: 10.1002/adma.201201795

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      In this Progress Report, the most recent literature on diketopyrrolopyrrole-containing polymers developed for field-effect transistor applications is reviewed and the structure–property relations of importance for achieving high performance n- and p-type transistor materials are discussed in detail.

    4. Interpretation of Optoelectronic Transient and Charge Extraction Measurements in Dye-Sensitized Solar Cells (pages 1881–1922)

      Piers R. F. Barnes, Kati Miettunen, Xiaoe Li, Assaf Y. Anderson, Takeru Bessho, Michael Gratzel and Brian C. O'Regan

      Version of Record online: 13 FEB 2013 | DOI: 10.1002/adma.201201372

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      Measuring the transient current or voltage signals after optically perturbing a dye-sensitized solar cell gives information about electron transport and recombination. These observations can be related to the internal charge concentration within a device which can be estimated using the charge extraction technique. Here the theory and practice of a wide range of these measurements is described, and illustrated with numerous examples.

  8. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
    1. Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation (pages 1923–1929)

      Kang Wei Chou, Buyi Yan, Ruipeng Li, Er Qiang Li, Kui Zhao, Dalaver H. Anjum, Steven Alvarez, Robert Gassaway, Alan Biocca, Sigurdur T. Thoroddsen, Alexander Hexemer and Aram Amassian

      Version of Record online: 22 FEB 2013 | DOI: 10.1002/adma.201203440

      Thumbnail image of graphical abstract

      Spin-coating is extensively used in the lab-based manufacture of organic solar cells, including most of the record-setting solution-processed cells. We report the first direct observation of photoactive layer formation as it occurs during spin-coating. The study provides new insight into mechanisms and kinetics of bulk heterojunction formation, which may be crucial for its successful transfer to scalable printing processes.

    2. Photophysics of the Geminate Polaron-Pair State in Copper Phthalocyanine Organic Photovoltaic Blends: Evidence for Enhanced Intersystem Crossing (pages 1930–1938)

      Edward W. Snedden, Andrew P. Monkman and Fernando B. Dias

      Version of Record online: 30 AUG 2012 | DOI: 10.1002/adma.201201350

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      Geminate polaron-pair recombination directly to the triplet state of the small dye molecule copper(II) 1,4,8,11,15,18,22,25-octabutoxy-29H,31H- phthalocyanine (CuPC) and exciton trapping in CuPC domains, combine to reduce the internal quantum efficiency of free polaron formation in the bulk-heterojunction blends of CuPC doped with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as the electron acceptor.

    3. Probing the Relation Between Charge Transport and Supramolecular Organization Down to Ångström Resolution in a Benzothiadiazole-Cyclopentadithiophene Copolymer (pages 1939–1947)

      Dorota Niedzialek, Vincent Lemaur, Dmytro Dudenko, Jie Shu, Michael Ryan Hansen, Jens Wenzel Andreasen, Wojciech Pisula, Klaus Müllen, Jérôme Cornil and David Beljonne

      Version of Record online: 19 JUN 2012 | DOI: 10.1002/adma.201201058

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      Molecular modeling shows that longitudinal displacement of the backbones by a couple of ångströms has a profound impact on the electronic coupling mediating charge transport in a conjugated copolymer. These changes can be probed by monitoring the calculated X-ray scattering patterns and NMR chemical shifts as a function of sliding of the polymer chains and comparing them to experiment.

  9. Research News

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Reviews
    9. Communications
    10. Research News
    1. Close Encounters of the 3D Kind – Exploiting High Dimensionality in Molecular Semiconductors (pages 1948–1954)

      Peter J. Skabara, Jean-Baptiste Arlin and Yves H. Geerts

      Version of Record online: 10 MAY 2012 | DOI: 10.1002/adma.201200862

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      Charge-transport behavior in organic semiconductors is highly dependent on intermolecular orbital overlap throughout the bulk solid. The latter arises from non-covalent interactions, such as π-π or heteroatom close contacts, and can take the form of 1D, 2D or 3D assemblies. The relationship between dimensionality and charge transport properties is considered for a range of molecular-based organic semiconductors.

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