Improving polymer transistor performance via morphology control.

In this tutorial review, different film microstructures, commonly termed morphologies, into which the organic semiconductor polymers self-assemble macroscopically are presented, together with their corresponding influence on charge carrier mobility and hence transistor behaviour. It will be clarified how various chemical design approaches and solution processing methods enable the manipulation of polymer morphology, leading to improvements in transistor performance. Ultimately, it is illustrated that the directional alignment of polymers form oriented fiber-like films, yielding one of the highest mobilities reported so far for polymer transistors. Based on these observations, a prediction is made concerning which kind of morphology is expected to reach the best charge carrier mobility.

[1]  Dago M. de Leeuw,et al.  Field-effect transistors made from solution-processed organic semiconductors , 1997 .

[2]  H. Pan,et al.  Poly(2,5‐bis(2‐thienyl)‐3,6‐dialkylthieno [3,2‐b]thiophene)s—High‐Mobility Semiconductors for Thin‐Film Transistors , 2006 .

[3]  C. C. Mattheus,et al.  Modeling the polymorphism of pentacene. , 2003, Journal of the American Chemical Society.

[4]  Z. Bao,et al.  Synthetic chemistry for ultrapure, processable, and high-mobility organic transistor semiconductors. , 2001, Accounts of chemical research.

[5]  Guangming Wang,et al.  Increased mobility from regioregular poly(3-hexylthiophene) field-effect transistors , 2003 .

[6]  K. Müllen,et al.  Novel organic semiconductors and processing techniques for organic field‐effect transistors , 2008 .

[7]  Jerzy Kanicki,et al.  Structural ordering and enhanced carrier mobility in organic polymer thin film transistors , 2004 .

[8]  Wojciech Pisula,et al.  Discotic liquid crystals: a new generation of organic semiconductors. , 2007, Chemical Society reviews.

[9]  Alberto Salleo,et al.  Materials Requirements and Fabrication of Active Matrix Arrays of Organic Thin-Film Transistors for Displays , 2004 .

[10]  Ute Zschieschang,et al.  Low-voltage organic transistors with an amorphous molecular gate dielectric , 2004, Nature.

[11]  Jean-Luc Brédas,et al.  Charge transport in organic semiconductors. , 2007, Chemical reviews.

[12]  Magnus Willander,et al.  Field‐effect mobility of poly(3‐hexylthiophene) , 1988 .

[13]  Tobin J Marks,et al.  Polymer Gate Dielectric Surface Viscoelasticity Modulates Pentacene Transistor Performance , 2007, Science.

[14]  Donal D. C. Bradley,et al.  Mobility enhancement in conjugated polymer field-effect transistors through chain alignment in a liquid-crystalline phase , 2000 .

[15]  Ping Liu,et al.  High-performance semiconducting polythiophenes for organic thin-film transistors. , 2004, Journal of the American Chemical Society.

[16]  Ullrich Scherf,et al.  Organic semiconductors for solution-processable field-effect transistors (OFETs). , 2008, Angewandte Chemie.

[17]  Gilles Horowitz,et al.  Organic Field‐Effect Transistors , 1998 .

[18]  Martin Brinkmann,et al.  Orientation of Regioregular Poly(3‐hexylthiophene) by Directional Solidification: A Simple Method to Reveal the Semicrystalline Structure of a Conjugated Polymer , 2006 .

[19]  E. W. Meijer,et al.  Two-dimensional charge transport in self-organized, high-mobility conjugated polymers , 1999, Nature.

[20]  Richard H. Friend,et al.  Integrated, high-mobility polymer field-effect transistors driving polymer light-emitting diodes , 1999 .

[21]  Richard D. McCullough,et al.  THE CHEMISTRY OF CONDUCTING POLYTHIOPHENES , 1998 .

[22]  P. Dyreklev,et al.  Aligned polymer chain field effect transistors , 1992 .

[23]  Guofeng Xu,et al.  Langmuir−Blodgett Films of Regioregular Poly(3-hexylthiophene) as Field-Effect Transistors , 2000 .

[24]  A. Salleo.  Charge transport in polymeric transistors , 2007 .

[25]  Y. Yoshida,et al.  High-Performance Poly(3-hexylthiophene) Field-Effect Transistors Fabricated by a Slide-Coating Method , 2008 .

[26]  Jiyoul Lee,et al.  Printable ion-gel gate dielectrics for low-voltage polymer thin-film transistors on plastic. , 2008, Nature materials.

[27]  M. Roberts,et al.  High‐Performance Organic Thin‐Film Transistors through Solution‐Sheared Deposition of Small‐Molecule Organic Semiconductors , 2008 .

[28]  S. Jenekhe,et al.  Phthalimide-based polymers for high performance organic thin-film transistors. , 2009, Journal of the American Chemical Society.

[29]  Maxim Shkunov,et al.  Liquid-crystalline semiconducting polymers with high charge-carrier mobility , 2006, Nature materials.

[30]  Wojciech Pisula,et al.  Uniaxial alignment of the columnar super-structure of a hexa (alkyl) hexa-peri-hexabenzocoronene on untreated glass by simple solution processing. , 2003, Journal of the American Chemical Society.

[31]  Janos Veres,et al.  Gate Insulators in Organic Field-Effect Transistors , 2004 .

[32]  K. Müllen,et al.  Processing of giant graphene molecules by soft-landing mass spectrometry , 2006, Nature materials.

[33]  Jung Ah Lim,et al.  Interface engineering in organic transistors , 2007 .

[34]  Christopher D. Simpson,et al.  Relationship between core size, side chain length, and the supramolecular organization of polycyclic aromatic hydrocarbons , 2005 .

[35]  K. Müllen,et al.  The Influence of Morphology on High‐Performance Polymer Field‐Effect Transistors , 2009 .

[36]  M. Vissenberg,et al.  Theory of the field-effect mobility in amorphous organic transistors , 1998, cond-mat/9802133.

[37]  E. Mena‐Osteritz.  Superstructures of Self-Organizing Thiophenes , 2002 .

[38]  M. Toney,et al.  Highly oriented crystals at the buried interface in polythiophene thin-film transistors , 2006 .

[39]  W. Pisula,et al.  Macroscopically aligned films of discotic phthalocyanine by zone casting , 2007 .

[40]  A. Pron,et al.  Effect of macromolecular parameters and processing conditions on supramolecular organisation, morphology and electrical transport properties in thin layers of regioregular poly(3-hexylthiophene) , 2006 .

[41]  Tian-an Chen,et al.  Polyalkylthiophenes with the smallest bandgap and the highest intrinsic conductivity , 1993 .

[42]  Janos Veres,et al.  Low‐k Insulators as the Choice of Dielectrics in Organic Field‐Effect Transistors , 2003 .

[43]  T. Kowalewski,et al.  Highly disordered polymer field effect transistors: N-alkyl dithieno[3,2-b:2',3'-d]pyrrole-based copolymers with surprisingly high charge carrier mobilities. , 2008, Journal of the American Chemical Society.

[44]  John A. Rogers,et al.  Printed plastic electronics and paperlike displays , 2002 .

[45]  Richard D. McCullough,et al.  Enhanced electrical conductivity in regioselectively synthesized poly(3-alkylthiophenes) , 1992 .

[46]  Richard H. Friend,et al.  General observation of n-type field-effect behaviour in organic semiconductors , 2005, Nature.

[47]  Jeong In Han,et al.  Enhancement of Field‐Effect Mobility Due to Surface‐Mediated Molecular Ordering in Regioregular Polythiophene Thin Film Transistors , 2005 .

[48]  A. Facchetti,et al.  A high-mobility electron-transporting polymer for printed transistors , 2009, Nature.

[49]  Henning Sirringhaus,et al.  Device Physics of Solution‐Processed Organic Field‐Effect Transistors , 2005 .

[50]  Henning Sirringhaus,et al.  High-Mobility Aligned Pentacene Films Grown by Zone-Casting , 2008 .

[51]  Do Hwan Kim,et al.  Surface-induced conformational changes in poly(3-hexylthiophene) monolayer films. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[52]  Jean M. J. Fréchet,et al.  Controlling the Field‐Effect Mobility of Regioregular Polythiophene by Changing the Molecular Weight , 2003 .

[53]  J. Rogers,et al.  Elastomeric Transistor Stamps: Reversible Probing of Charge Transport in Organic Crystals , 2004, Science.

[54]  R. Rieke,et al.  The first regioregular head-to-tail poly(3-hexylthiophene-2,5-diyl) and a regiorandom isopolymer: nickel versus palladium catalysis of 2(5)-bromo-5(2)-(bromozincio)-3-hexylthiophene polymerization , 1992 .

[55]  Richard H. Friend,et al.  Close look at charge carrier injection in polymer field-effect transistors , 2003 .

[56]  Lin-Wang Wang,et al.  Charge carrier motion in disordered conjugated polymers: a multiscale Ab initio study. , 2009, Nano letters.

[57]  Henning Sirringhaus,et al.  A Zone‐Casting Technique for Device Fabrication of Field‐Effect Transistors Based on Discotic Hexa‐peri‐hexabenzocoronene , 2005 .

[58]  H. Sirringhaus,et al.  Integrated optoelectronic devices based on conjugated polymers , 1998, Science.

[59]  Wojciech Pisula,et al.  Influence of alkyl substituents on the solution- and surface-organization of hexa-peri-hexabenzocoronenes. , 2005, Journal of the American Chemical Society.

[60]  R. Street,et al.  Transport in polycrystalline polymer thin-film transistors , 2005 .

[61]  A. Arias,et al.  Materials and applications for large area electronics: solution-based approaches. , 2010, Chemical reviews.

[62]  H. Sirringhaus,et al.  Self-Aligned, Vertical-Channel, Polymer Field-Effect Transistors , 2003, Science.

[63]  H. Sirringhaus,et al.  High-Resolution Ink-Jet Printing of All-Polymer Transistor Circuits , 2000, Science.

[64]  Ping Liu,et al.  Thiophene polymer semiconductors for organic thin-film transistors. , 2008, Chemistry.

[65]  B. Grévin,et al.  Scanning Tunneling Microscopy Investigations of Self‐Organized Poly(3‐hexylthiophene) Two‐Dimensional Polycrystals , 2003 .

[66]  Aram Amassian,et al.  Tetrathienoacene copolymers as high mobility, soluble organic semiconductors. , 2008, Journal of the American Chemical Society.

[67]  H. Bässler.  Charge Transport in Disordered Organic Photoconductors a Monte Carlo Simulation Study , 1993 .

[68]  H. Sirringhaus,et al.  Electron–Hole Recombination in Uniaxially Aligned Semiconducting Polymers , 2008 .

[69]  R. J. Kline,et al.  Morphology and Charge Transport in Conjugated Polymers , 2006 .

[70]  K. Müllen,et al.  Field-effect transistors based on a benzothiadiazole-cyclopentadithiophene copolymer. , 2007, Journal of the American Chemical Society.

[71]  Henning Sirringhaus,et al.  Enhanced Mobility of Poly(3-hexylthiophene) Transistors by Spin-Coating from High-Boiling-Point Solvents , 2004 .

[72]  T. Pakula,et al.  Zone casting - a universal method of preparing oriented anisotropic layers of organic materials , 2004 .

[73]  Henrik Stubb,et al.  Molecular field‐effect transistors using conducting polymer Langmuir–Blodgett films , 1990 .

[74]  Iain McCulloch,et al.  Progress and Challenges in Commercialization of Organic Electronics , 2008 .

[75]  Noam Rappaport,et al.  Charge Transport in Disordered Organic Materials and Its Relevance to Thin‐Film Devices: A Tutorial Review , 2009 .

[76]  J. A. Logan,et al.  Near-surface alignment of polymers in rubbed films , 1995, Nature.

[77]  Tobin J. Marks,et al.  Gate Dielectrics for Organic Field‐Effect Transistors: New Opportunities for Organic Electronics , 2005 .

[78]  Zhenan Bao,et al.  Effect of Mesoscale Crystalline Structure on the Field‐Effect Mobility of Regioregular Poly(3‐hexyl thiophene) in Thin‐Film Transistors , 2005 .

[79]  J. Pflaum,et al.  Effect of Molecular Weight and Annealing of Poly(3‐hexylthiophene)s on the Performance of Organic Field‐Effect Transistors , 2004 .