Recent Advances in Conjugated Polymers for Light Emitting Devices

A recent advance in the field of light emitting polymers has been the discovery of electroluminescent conjugated polymers, that is, kind of fluorescent polymers that emit light when excited by the flow of an electric current. These new generation fluorescent materials may now challenge the domination by inorganic semiconductor materials of the commercial market in light-emitting devices such as light-emitting diodes (LED) and polymer laser devices. This review provides information on unique properties of conjugated polymers and how they have been optimized to generate these properties. The review is organized in three sections focusing on the major advances in light emitting materials, recent literature survey and understanding the desirable properties as well as modern solid state lighting and displays. Recently, developed conjugated polymers are also functioning as roll-up displays for computers and mobile phones, flexible solar panels for power portable equipment as well as organic light emitting diodes in displays, in which television screens, luminous traffic, information signs, and light-emitting wallpaper in homes are also expected to broaden the use of conjugated polymers as light emitting polymers. The purpose of this review paper is to examine conjugated polymers in light emitting diodes (LEDs) in addition to organic solid state laser. Furthermore, since conjugated polymers have been approved as light-emitting organic materials similar to inorganic semiconductors, it is clear to motivate these organic light-emitting devices (OLEDs) and organic lasers for modern lighting in terms of energy saving ability. In addition, future aspects of conjugated polymers in LEDs were also highlighted in this review.

[1]  A. Moulé.  Power from plastic , 2010 .

[2]  A. Mau,et al.  Conjugated polymers for light-emitting applications , 2001 .

[3]  Wei Huang,et al.  New Phenyl-Substituted PPV Derivatives for Polymer Light-emitting Diodes−Synthesis, Characterization and Structure−Property Relationship Study , 2003 .

[4]  Uli Lemmer,et al.  Conjugated polymers: lasing and stimulated emission , 2001 .

[5]  M. Paoli,et al.  Optical devices based on conductive polymers , 2001 .

[6]  Stephen R. Forrest,et al.  The path to ubiquitous and low-cost organic electronic appliances on plastic , 2004, Nature.

[7]  X. Crispin,et al.  Fluorescence light emission at 1 eV from a conjugated polymer , 2010 .

[8]  Donal D. C. Bradley,et al.  Fluorene-based conjugated polymer optical gain media , 2003 .

[9]  G. Kranzelbinder,et al.  Organic solid-state lasers , 2000 .

[10]  R. W. Gymer.  Organic electroluminescent displays , 1996 .

[11]  J. Léger.  Organic Electronics: The Ions Have It , 2008 .

[12]  James J. O'Brien,et al.  Progress with Light‐Emitting Polymers , 2000 .

[13]  Daniel Moses,et al.  Low Thresholds in Polymer Lasers on Conductive Substrates by Distributed Feedback Nanoimprinting: Progress Toward Electrically Pumped Plastic Lasers , 2009 .

[14]  Alan J. Heeger,et al.  Semiconducting Polymers: The Third Generation , 2010 .

[15]  Donal D. C. Bradley,et al.  Conjugated polymer electroluminescence , 1993 .

[16]  Koon Gee Neoh,et al.  Polymer electronic memories: Materials, devices and mechanisms , 2008 .

[17]  G. Turnbull,et al.  Polymer lasers: recent advances , 2004 .

[18]  Stefano Tonzani,et al.  Lighting technology: Time to change the bulb , 2009, Nature.

[19]  J. Kalinowski.  Optical materials for organic light-emitting devices , 2008 .

[20]  O. Inganäs,et al.  Polymer optoelectronics - towards nanometer dimensions , 2003 .

[21]  Chiara Botta,et al.  Memory applications of a thiophene-based conjugated polymer by photoluminescence measurements , 2005 .

[22]  David G Lidzey,et al.  Laser-assisted patterning of conjugated polymer light emitting diodes , 2005 .

[23]  K. Schanze,et al.  Photophysics of metal-organic π-conjugated polymers , 1998 .

[24]  Khai Leok Chan,et al.  Synthesis of light-emitting conjugated polymers for applications in electroluminescent devices. , 2009, Chemical reviews.

[25]  H. Shim,et al.  Light-emitting properties of a germyl-substituted PPV derivative synthesized via a soluble precursor , 2004 .

[26]  M. Toerker,et al.  OLED manufacturing for large area lighting applications , 2010 .

[27]  C.-H. Chen,et al.  Recent progress of molecular organic electroluminescent materials and devices , 2002 .

[28]  K. Schanze,et al.  Conjugated polyelectrolytes: synthesis, photophysics, and applications. , 2009, Angewandte Chemie.

[29]  Hideo Hosono,et al.  Transparent Oxide Optoelectronics , 2004 .

[30]  Ifor D. W. Samuel.  Laser physics: Fantastic plastic , 2004, Nature.

[31]  J. Fink.  Poly(arylene vinylene)s , 2008 .

[32]  A. Ivaska,et al.  Electrochemically prepared light-emitting diodes of poly(para-phenylene) , 1997 .

[33]  David Braun,et al.  Semiconducting polymer LEDs , 2002 .

[34]  Patrice Rannou,et al.  Processible conjugated polymers: from organic semiconductors to organic metals and superconductors , 2002 .

[35]  E. Saion,et al.  Conjugated Conducting Polymers: A Brief , 2007 .

[36]  Lou Reade.  Power from plastic , 2009 .

[37]  Lewis J. Rothberg,et al.  Electrically active organic and polymeric materials for thin-film-transistor technologies , 1996 .

[38]  Zhenan Bao,et al.  Conjugated polymers exhibiting liquid crystallinity , 1994 .

[39]  Gustafson,et al.  Spatially and temporally resolved emission from aggregates in conjugated polymers. , 1996, Physical review. B, Condensed matter.

[40]  Alan Mills.  Solid state lighting — a world of expanding opportunities at LED 2002 , 2003 .

[41]  E. List,et al.  Progress towards stable blue light-emitting polymers , 2004 .

[42]  Volker Wittwer,et al.  A flexible conjugated polymer laser , 1998 .

[43]  Hiroyuki Suzuki.  Organic light-emitting materials and devices for optical communication technology , 2004 .

[44]  Jan Birnstock,et al.  Highly efficient white OLEDs for lighting applications , 2005, SPIE Optics + Photonics.

[45]  Leni Akcelrud,et al.  Electroluminescent polymers , 2003 .

[46]  M. Cole,et al.  Summary and Future Prospects , 2001 .

[47]  P. Delfyett,et al.  Time- and spectrally resolved ultrafast gain dynamics of a semiconductor optical amplifier under phase-correlated multiwavelength pulse amplification , 2004 .

[48]  F. E. Karasz,et al.  Photophysical and Optoelectronic Properties of Green-Emitting Alkoxy-Substituted PE/PV Hybrid Conjugated Polymers , 2004 .

[49]  F. Garnier.  Functionalized Conducting Polymers—Towards Intelligent Materials , 1989 .

[50]  G. Kang,et al.  Photoluminescence and electroluminescence of vacuum-deposited poly(p-phenylene) thin film , 2001 .

[51]  W. Fann,et al.  Structure and charge transport properties in MEH-PPV , 2003 .

[52]  R. Friend,et al.  Fluorescence and Phosphorescence in Organic Materials , 2002 .

[53]  D. Bäuerle.  Laser Processing and Chemistry , 1996 .

[54]  Alan J. Heeger,et al.  New Developments in the Photonic Applications of Conjugated Polymers , 1997 .

[55]  Linghai Xie,et al.  Recent Developments in Top‐Emitting Organic Light‐Emitting Diodes , 2010, Advanced materials.

[56]  D. Abouelaoualim.  Numerical study of electrical characteristics of conjugated polymer light-emitting diodes , 2008 .

[57]  Donal D. C. Bradley,et al.  High brightness conjugated polymer LEDs , 2000 .

[58]  I. Kim,et al.  Recent progress in the development of polymers for white light-emitting polymer devices , 2008 .

[59]  Zhishan Bo,et al.  Three-dimensional conjugated macromolecules as light-emitting materials , 2010 .

[60]  David Buckingham,et al.  Optical Properties. (Book Reviews: Modern Nonlinear Optics.) , 1994 .

[61]  Mary O'Neill,et al.  Ordered Materials for Organic Electronics and Photonics , 2011, Advanced materials.

[62]  Vittorio Ghergia.  New materials for optoelectronic devices , 1993 .

[63]  Hans-Joachim Egelhaaf,et al.  Optical Bandgaps of π‐Conjugated Organic Materials at the Polymer Limit: Experiment and Theory , 2007 .

[64]  E. List,et al.  Materials for polymer electronics applications – semiconducting polymer thin films and nanoparticles , 2004 .

[65]  Heinz-Georg Nothofer,et al.  Improving the performance of doped π-conjugated polymers for use in organic light-emitting diodes , 2000, Nature.

[66]  Dieter Bäuerle,et al.  Laser processing and chemistry: recent developments , 2002 .

[67]  D. Naegele.  Electrically conductive polymers as rechargeable battery electrodes , 1988 .

[68]  A. Heeger,et al.  A Novel Series of Efficient Thiophene-Based Light-Emitting Conjugated Polymers and Application in Polymer Light-Emitting Diodes , 2000 .

[69]  Fosong Wang,et al.  High PL quantum efficiency of poly(phenylene vinylene) systems through exciton confinement , 2000 .

[70]  D. Dini.  Electrochemiluminescence from Organic Emitters , 2005 .

[71]  Antonio Facchetti,et al.  π-Conjugated Polymers for Organic Electronics and Photovoltaic Cell Applications† , 2011 .

[72]  A. Green,et al.  Ultracentrifugation of single-walled nanotubes , 2007 .

[73]  Harald Giessen,et al.  Blue-green laser emission from a solid conjugated polymer , 1997 .

[74]  Hideki Shirakawa,et al.  Nobel Lecture: The discovery of polyacetylene film-the dawning of an era of conducting polymers , 2001 .

[75]  S. Chen,et al.  A Review on the Emitting Species in Conjugated Polymers for Photo‐ and Electro‐luminescence , 2010 .

[76]  Richard Friend.  Materials science: Polymers show they're metal , 2006, Nature.

[77]  Samson A Jenekhe,et al.  Solution‐Processed Highly Efficient Blue Phosphorescent Polymer Light‐Emitting Diodes Enabled by a New Electron Transport Material , 2010, Advanced materials.

[78]  I. Grizzi,et al.  Conjugated polymer-based light emitting diodes , 2007 .

[79]  D. Moses,et al.  Organic light emitting complementary inverters , 2010 .

[80]  J. Brédas,et al.  Electronic structure and nonlinear optical properties of aromatic polymers and their derivatives , 1989 .

[81]  W. Barnes,et al.  Photonic band structure and emissive characteristics of MEH-PPV textured microcavities , 2001 .

[82]  Stephen R. Forrest,et al.  White Organic Light‐Emitting Devices for Solid‐State Lighting , 2004 .

[83]  Takakazu Yamamoto,et al.  π-Conjugated polymers bearing electronic and optical functionalities. Preparation, properties and their applications , 1998 .

[84]  D. De Rossi,et al.  Colours from electroactive polymers: Electrochromic, electroluminescent and laser devices based on organic materials , 2006 .

[85]  Gilles Horowitz,et al.  High‐Performance Organic Field‐Effect Transistors , 2009 .

[86]  John R. Reynolds,et al.  Electrochromic organic and polymeric materials for display applications , 2006, Displays.

[87]  E. List,et al.  Solution Processed Conjugated Polymer Multilayer Structures for Light Emitting Devices , 2005 .

[88]  Andreas E. Vasdekis,et al.  Broadband solid state optical amplifier based on a semiconducting polymer , 2006 .

[89]  Y. Loo,et al.  Organic Electronic Devices with Water-Dispersible Conducting Polymers , 2011 .

[90]  R. L. Elsenbaumer,et al.  Handbook of conducting polymers , 1986 .

[91]  I. F. Perepichka,et al.  Star-shaped pi-conjugated oligomers and their applications in organic electronics and photonics. , 2010, Chemical Society reviews.

[92]  Functionalized Conducting Polymers—Towards Intelligent Materials , 1989 .

[93]  P. Blom,et al.  Novel organic materials and technological advances for photonics , 2002 .

[94]  I. F. Perepichka,et al.  Star‐Shaped π‐Conjugated Oligomers and Their Applications in Organic Electronics and Photonics , 2010 .

[95]  Richard H. Friend,et al.  Semiconductor Device Physics of Conjugated Polymers , 1996 .

[96]  Maj Thijs Michels,et al.  Electronic and optical excitations in crystalline conjugated polymers , 2002 .

[97]  May Paul.  Polymer electronics – fact or fantasy? , 1995 .

[98]  A. Heeger.  Nobel Lecture: Semiconducting and metallic polymers: The fourth generation of polymeric materials* , 2001 .

[99]  Xinping Zhang,et al.  Saturation, Relaxation, and Dissociation of Excited Triplet Excitons in Conjugated Polymers , 2009 .

[100]  Fred Wudl,et al.  Optical properties of conducting polymers , 1988 .

[101]  Serguei Brazovskii,et al.  Physical theory of excitons in conducting polymers. , 2010, Chemical Society reviews.

[102]  N. Tessler.  Laser Devices from Molecular and Polymer Semiconductors , 2001 .

[103]  Christoph Gadermaier,et al.  Imprinted Conjugated Polymer Laser , 2003 .

[104]  D. Galvão,et al.  Fluorescence and excited‐state structure of conjugated polymers , 1994 .

[105]  S. Morozumi,et al.  Organic EL Displays , 2001 .

[106]  R. N. Marks,et al.  Light-emitting diodes based on conjugated polymers , 1990, Nature.

[107]  M. Willander,et al.  Conducting Organic Materials and Devices , 2012 .

[108]  E. List,et al.  Excitation energy migration assisted processes in conjugated polymers , 2004 .

[109]  Lewis J. Rothberg,et al.  Status of and prospects for organic electroluminescence , 1996 .

[110]  R. Segalman,et al.  Block Copolymers for Organic Optoelectronics , 2009 .

[111]  J. Shinar,et al.  An Overview of Organic Light-Emitting Diodes and their Applications , 2011 .

[112]  Laurence Lutsen,et al.  Conjugated polymers based on new thienylene – PPV derivatives for solar cell applications , 2002 .

[113]  Heinz-Georg Nothofer,et al.  Phosphorescence in Conjugated Poly(para‐phenylene)‐Derivatives , 2001 .

[114]  J. Gould,et al.  Polymer Electronics , 2004 .

[115]  Yi-Ren Chen,et al.  High performance organic field-effect transistors , 2006, SPIE Optics + Photonics.

[116]  N. T. Harrison,et al.  Electronic Processes of Conjugated Polymers in Semiconductor Device Structures , 1997 .

[117]  D. Bradley.  Elctroluminescence: A bright future for conjugated polymers? , 1992 .

[118]  J. Joo,et al.  Hybrid nanostructures using pi-conjugated polymers and nanoscale metals: synthesis, characteristics, and optoelectronic applications. , 2010, Chemical Society reviews.

[119]  Donal D. C. Bradley,et al.  Electroluminescent polymers: materials, physics and device engineering , 1996 .

[120]  Mats Andersson,et al.  Plastic lasers: Semiconducting polymers as a new class of solid-state laser materials , 1997 .

[121]  Gerwin H. Gelinck,et al.  Narrow-band emissions from conjugated-polymer films , 1997 .

[122]  B. Santo,et al.  Solid State , 2012 .

[123]  T. Ahn,et al.  Novel Poly(p-phenylenevinylene)s with an Electron-Withdrawing Cyanophenyl Group† , 2002 .

[124]  R. Polson,et al.  Laser Action in Organic Semiconductors , 2011 .

[125]  Tieneke E. Dykstra.  Photophysics of Conjugated Polymers , 2008 .

[126]  P. Barbara,et al.  Single conjugated polymer nanoparticle capacitors , 2009 .

[127]  A. Greiner,et al.  Aspects of synthesis, analysis and application of aromatic conjugated polymers , 1991 .

[128]  John K. Borchardt,et al.  Developments in organic displays , 2004 .

[129]  H. Shim,et al.  Light-Emitting Characteristics of Conjugated Polymers , 2002 .

[130]  Shih‐Chang Lin,et al.  Efficient white light emission in conjugated polymer homojunctions , 2004 .

[131]  E. W. Meijer,et al.  Synthesis, processing and material properties of conjugated polymers , 1996 .

[132]  Richard H. Friend,et al.  Conjugated polymers. New materials for optoelectronic devices , 2001 .

[133]  Alan J. Heeger,et al.  Semiconducting (Conjugated) Polymers as Materials for Solid‐State Lasers , 2000 .

[134]  L. Azeez,et al.  Available Online at www , 2010 .

[135]  Yang Yang,et al.  Polymer Electroluminescent Devices , 1997 .

[136]  P. Predeep,et al.  POLYMER LIGHT EMITTING DIODES - A REVIEW ON MATERIALS AND TECHNIQUES , 2010 .

[137]  Abhishek P. Kulkarni,et al.  Electron Transport Materials for Organic Light-Emitting Diodes , 2004 .

[138]  Dirk Buchhauser,et al.  Light extraction from OLEDs for lighting applications through light scattering , 2007 .

[139]  Robert F Service.  Organic LEDs Look Forward to a Bright, White Future , 2005, Science.

[140]  P. Ball.  A happier marriage , 2001 .

[141]  Jenny Clark,et al.  Organic photonics for communications , 2010 .

[142]  H. Bouchriha,et al.  Photoluminescence and electroluminescence investigations in PEPPV and its derivatives , 2000 .

[143]  Alan G. MacDiarmid,et al.  Nobel Lecture: “Synthetic metals”: A novel role for organic polymers , 2001 .

[144]  D. Braun,et al.  Photo‐ and electroluminescence efficiency in soluble poly(dialky1‐p‐phenylenevinylene) , 1994 .

[145]  Ullrich Mitschke,et al.  The electroluminescence of organic materials , 2000 .

[146]  G A Turnbull,et al.  Organic semiconductor lasers. , 2007, Chemical reviews.

[147]  R. N. Marks,et al.  Light-emitting diodes fabricated with conjugated polymers — recent progress , 1994 .

[148]  John P. Ferraris,et al.  MEH-PPV: Improved synthetic procedure and molecular weight control , 2000 .

[149]  S. Holdcroft.  Patterning π‐Conjugated Polymers , 2001 .

[150]  C. Ha,et al.  Polymers for flexible displays: From material selection to device applications , 2008 .

[151]  Christoph J. Brabec,et al.  A low-bandgap semiconducting polymer for photovoltaic devices and infrared emitting diodes , 2002 .

[152]  M. Ozaki,et al.  Optical and electrical properties and photoexcited laser oscillation of composite film based on π-conjugated polymers , 2009 .