Thin-film permeation-barrier technology for flexible organic light-emitting devices

One of the advantages of organic light-emitting devices (OLEDs) over other display technologies is the ability to fabricate them on flexible substrates. As polymer substrates do not offer the same barrier performance as glass, OLEDs on polymer substrates will require thin-film barriers on both the bottom and top side of the device layers for sufficient lifetimes. This article provides a review of permeation-barrier technologies as well as the current status of thin-film permeation barriers for OLEDs. Topics include the implications of various device structures, permeation rate measurement, background and state-of-the-art of barrier technology, and mechanical and optical considerations for effective barriers.

[1]  Tetsuo Tsutsui,et al.  Control of emission characteristics in organic thin‐film electroluminescent diodes using an optical‐microcavity structure , 1993 .

[2]  R. H. Partridge,et al.  Electroluminescence from polyvinylcarbazole films: 1. Carbazole cations , 1983 .

[3]  V. Bulovic,et al.  Transparent light-emitting devices , 1996, Nature.

[4]  Y. Taga,et al.  P‐87: Optical Simulation of Organic Light Emitting Diodes , 2003 .

[5]  M. Wertheimer,et al.  Study of Defect Numbers and Distributions in Pecvd S10 2 Transparent Barrier Coatings on Pet , 1998 .

[6]  Karsten Heuser,et al.  Performance of flexible polymeric light-emitting diodes under bending conditions , 2003 .

[7]  E. Ou,et al.  Low moisture permeation measurement through polymer substrates for organic light emitting devices , 2002 .

[8]  P. S. Vincett,et al.  Electrical conduction and low voltage blue electroluminescence in vacuum-deposited organic films , 1982 .

[9]  A. Sugimoto,et al.  Organic Light Emitting Devices on Polymer Substrates. , 2001 .

[10]  S R Forrest,et al.  Vacuum-deposited, nonpolymeric flexible organic light-emitting devices. , 1997, Optics letters.

[11]  David G Lidzey,et al.  Photoprocessed and micropatterned conjugated polymer LEDs , 1996 .

[12]  Timothy A. Brunner,et al.  Elastic relationships in layered composite media with approximation for the case of thin films on a thick substrate , 1987 .

[13]  Julia M. Phillips,et al.  Physics and applications of organic microcavity light emitting diodes , 1996 .

[14]  G. Crawford,et al.  Reliability of transparent conducting substrates for rollable displays: A cyclic loading investigation , 2004 .

[15]  Michael S. Weaver,et al.  High-efficiency top-emitting organic light-emitting devices , 2002 .

[16]  Tetsuo Tsutsui,et al.  MICROCAVITY ORGANIC LIGHT-EMITTING DIODES FOR STRONGLY DIRECTED PURE RED, GREEN, AND BLUE EMISSIONS , 1999 .

[17]  Y. Itoh,et al.  Organic photo- and electroluminescent devices with double mirrors , 1993 .

[18]  Mohamed Latreche,et al.  Transparent barrier coatings on polyethylene terephthalate by single- and dual-frequency plasma-enhanced chemical vapor deposition , 1998 .

[19]  M. Wertheimer,et al.  Recent Advances in Plasma Deposition of Functional Coatings on Polymers , 1998 .

[20]  J. Månson,et al.  Adhesion of silicon oxide layers on poly(ethylene terephthalate). II: Effect of coating thickness on adhesive and cohesive strengths , 1997 .

[21]  Jin Jang,et al.  P‐90: Permeation Properties of Inorganic Thin‐Film and Its Application to PM‐OLED using Electron Beam Evaporation System , 2003 .

[22]  R. Friend,et al.  Microcavity effect in a single‐layer polymer light‐emitting diode , 1995 .

[23]  Daeyong Cho,et al.  Passivation of Organic Light-Emitting Diodes by the Plasma Polymerized para-Xylene Thin Film , 2002 .

[24]  M. Weaver,et al.  Organic electroluminescence devices fabricated with chemical vapour deposited polyazomethine films , 1996 .

[25]  Giuseppe Rossi,et al.  Effect of local flaws in polymeric permeation reducing barriers , 1993 .

[26]  C. Tang,et al.  Application of an ultrathin LiF/Al bilayer in organic surface-emitting diodes , 2001 .

[27]  Z. Suo,et al.  Mixed mode cracking in layered materials , 1991 .

[28]  Wendy D. Bennett,et al.  Gas permeation and lifetime tests on polymer-based barrier coatings , 2001, SPIE Optics + Photonics.

[29]  Hood Chatham,et al.  Oxygen diffusion barrier properties of transparent oxide coatings on polymeric substrates , 1996 .

[30]  Timothy P. Weihs,et al.  Mechanical deflection of cantilever microbeams: A new technique for testing the mechanical properties of thin films , 1988 .

[31]  R. Caudano,et al.  Deposition of silicon oxide onto polyethylene and polyethyleneterephthalate: An x‐ray photoelectron spectroscopy interfacial study , 1995 .

[32]  G. Crawford,et al.  47.3: Reliability of Transparent Conducting Substrates for Rollable Displays: A Cyclic Loading Investigation , 2003 .

[33]  Wendy D. Bennett,et al.  Organic light-emitting devices with extended operating lifetimes on plastic substrates , 2002 .

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

[35]  Y. Taga,et al.  LP‐5: Late‐News Poster: Plasma‐CVD SiNx / Plasma‐Polymerized CNx:H Multi‐layer Passivation Films for Organic Light Emitting Diodes , 2003 .

[36]  Kamala Rajan,et al.  21.4: Thin Film Encapsulated Flexible OLED Displays , 2003 .

[37]  W. K. Kwak.  A 5.0-in WVGA AMOLED Display for PDAs , 2003 .

[38]  Hirofumi Kubota,et al.  21.1: Invited Paper: 3‐inch Full‐color OLED Display using a Plastic Substrate , 2003 .

[39]  Chishio Hosokawa,et al.  Organic multi-color electroluminescence display with fine pixels , 1997 .

[40]  J. Hilborn,et al.  A method to measure the adhesion of thin glass coatings on polymer films , 1994 .

[41]  M. Heuken,et al.  Organic Vapor Phase Deposition , 2006 .

[42]  Stephen R. Forrest,et al.  A metal-free cathode for organic semiconductor devices , 1998 .

[43]  C. Tang,et al.  Organic Electroluminescent Diodes , 1987 .

[44]  Y. Tsuruoka,et al.  21.2: Transparent Thin Film Desiccant for OLEDs , 2003 .

[45]  Chung-Chih Wu,et al.  Ink-jet printing of doped polymers for organic light emitting devices , 1998 .

[46]  J. M. Martínez-Duart,et al.  Atomic force microscopy (AFM) morphological surface characterization of transparent gas barrier coatings on plastic films , 1996 .

[47]  N. Harvey,et al.  Activated Rate Theory Treatment of Oxygen and Water Transport through Silicon Oxide/Poly(ethylene terephthalate) Composite Barrier Structures , 1997 .

[48]  N. Takeda,et al.  Cracking phenomena of brittle films in nanostructure composites analysed by a modified shear lag model with residual strain , 1998 .

[49]  Nasser N Peyghambarian,et al.  Novel techniques in fabricating more efficient and brighter organic electroluminescent devices , 1997, Optics & Photonics.

[50]  G. Dennler,et al.  Growth and structure of hyperthin SiO2 coatings on polymers , 2001 .

[51]  Peter M. Martin,et al.  A new method for fabricating transparent barrier layers , 1996 .

[52]  S. Forrest,et al.  Semitransparent cathodes for organic light emitting devices , 2000 .

[53]  F. Papadimitrakopoulos,et al.  Chemical and morphological stability of aluminum tris(8-hydroxyquinoline) (Alq/sub 3/): effects in light-emitting devices , 1998 .

[54]  N. Takeda,et al.  Effects of temperature on the multiple cracking progress of sub-micron thick glass films deposited on a polymer substrate , 1999 .

[55]  G. Schottner,et al.  Functionalized coatings based on inorganic–organic polymers (ORMOCER®s) and their combination with vapor deposited inorganic thin films , 1999 .

[56]  P‐28: The Effect of Thermal Shrinkage on Indium Tin Oxide Coated Polyethylene Terephthalate for Flexible Display Applications , 2001 .

[57]  A. Windle,et al.  Structure and oxygen-barrier properties of metallized polymer film , 1983 .

[58]  Ching Wan Tang,et al.  Interface engineering in preparation of organic surface-emitting diodes , 1999 .

[59]  Alessandro Curioni,et al.  Lithium–aluminum contacts for organic light-emitting devices , 1997 .

[60]  S. T. Lee,et al.  Sputter deposition of cathodes in organic light emitting diodes , 1999 .

[61]  C. Tang,et al.  Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode , 1997 .

[62]  A. J. Heeger,et al.  Polyaniline as a transparent electrode for polymer light‐emitting diodes: Lower operating voltage and higher efficiency , 1994 .

[63]  Jin Jang,et al.  P‐89: Passivation Properties of Inorganic Films for Flexible OLEDs (F‐OLED) , 2003 .

[64]  S. Park,et al.  Mechanical Stability of Externally Deformed Indium–Tin–Oxide Films on Polymer Substrates , 2003 .

[65]  Mark P. Andrews,et al.  Plasma-deposited silicon oxide and silicon nitride films on poly(ethylene terephthalate): A multitechnique study of the interphase regions , 1998 .

[66]  Piet C.P. Bouten,et al.  P‐88: Thin Film Encapsulation for OLEDs: Evaluation of Multi‐layer Barriers using the Ca Test , 2003 .

[67]  Michael Popall,et al.  Inorganic-organic hybrid materials for polymer electronic applications , 2003 .

[68]  Jae-Ho Lee,et al.  29.3: A Novel Patterning Method for Full‐Color Organic Light‐Emitting Devices: Laser Induced Thermal Imaging (LITI) , 2002 .

[69]  A. S. Grove,et al.  General Relationship for the Thermal Oxidation of Silicon , 1965 .

[70]  A. Heeger,et al.  Flexible light-emitting diodes made from soluble conducting polymers , 1992, Nature.

[71]  H. Frisch,et al.  Diffusion of small molecules in polymers , 1983 .

[72]  T. Takagi,et al.  Diamondlike carbon deposition on plastic films by plasma source ion implantation , 2002 .

[73]  Perry D. Haaland,et al.  SiOx Gas Barrier Coatings on Polymer Substrates: Morphology and Gas Transport Considerations , 1999 .

[74]  R. M. Barrer.  Diffusion in and through solids , 1941 .

[75]  Heike Riel,et al.  Phosphorescent top-emitting organic light-emitting devices with improved light outcoupling , 2003 .

[76]  M. Vogt,et al.  Plasma-deposited passivation layers for moisture and water protection , 1995 .

[77]  H. Frisch,et al.  The Selective Permeation of Gases Through Polymers , 1981 .

[78]  Mohamed Latreche,et al.  Defect-permeation correlation for ultrathin transparent barrier coatings on polymers , 2000 .

[79]  W. Peukert,et al.  Inorganic Layers on Polymeric Films – Influence of Defects and Morphology on Barrier Properties , 2003 .

[80]  Y. Leterrier.  Durability of nanosized oxygen-barrier coatings on polymers , 2003 .

[81]  Alison B. Walker,et al.  Simulation of organic light-emitting diodes , 2000 .

[82]  L. Laih,et al.  Angular Dependence of the Sharply Directed Emission in Organic Light Emitting Diodes with a Microcavity Structure , 2002 .

[83]  G. Crawford,et al.  Strain-dependent electrical resistance of tin-doped indium oxide on polymer substrates , 2000 .

[84]  B. M. Henry,et al.  A microstructural study of transparent metal oxide gas barrier films , 1999 .

[85]  Daewon Sohn,et al.  Polymer-based multi-layer conductive electrode film for plastic LCD applications , 2001 .

[86]  C. Adachi,et al.  Organic electroluminescent device with cyanine dye Langmuir-Blodgett film as an emitter , 1992 .

[87]  Gordon L. Graff,et al.  PML/oxide/PML barrier layer performance differences arising from use of UV or electron beam polymerization of the PML layers , 1997 .

[88]  Göran Gustafsson,et al.  The “plastic” led: A flexible light-emitting device using a polyaniline transparent electrode , 1993 .

[89]  H. Chan,et al.  Investigation of the sites of dark spots in organic light-emitting devices , 2000 .

[90]  A. Heeger,et al.  Visible light emission from semiconducting polymer diodes , 1991 .

[91]  Martin Randler,et al.  A flexible ferroelectric liquid‐crystal display with improved mechanical stability for smart‐card applications , 2002 .

[92]  C. Schaus,et al.  Electroluminescent displays , 1991, Summaries of papers presented at the Conference on Lasers and Electro-Optics.

[93]  H. Peng,et al.  P‐78: Design and Characterization of Organic Light Emitting Diodes with Microcavity Structure , 2003 .

[94]  Seung‐Man Yang,et al.  Preparation of silica-based hybrid materials coated on polypropylene film , 1999 .

[95]  Stephen R. Forrest,et al.  Ultrathin Organic Films Grown by Organic Molecular Beam Deposition and Related Techniques. , 1997, Chemical reviews.

[96]  T. O'sullivan,et al.  Mechanical Properties of Thin Films , 1990 .

[97]  Ellie Yieh,et al.  Moisture Resistance of Plasma Enhanced Chemical Vapor Deposited Oxides Used for Ultralarge Scale Integrated Device Applications , 1995 .

[98]  Yasunori Taga,et al.  Design of multiwavelength resonant cavities for white organic light-emitting diodes , 2003 .

[99]  C. Adachi,et al.  Effect of confined radiation field on spontaneous-emission lifetime in vacuum-deposited fluorescent dye films , 1991 .

[100]  N. Takeda,et al.  Thickness Effect on Cracking Phenomena and Mechanical Properties of Submicron Glass Thin Films Deposited on a Polymer Substrate , 1998 .

[101]  E. Hack,et al.  Hydrocarbon films inhibit oxygen permeation through plastic packaging material 1 Prize to the best p , 1998 .

[102]  Jang Hyuk Kwon,et al.  9.3: 2.2″ QCIF Full Color Transparent AMOLED Display , 2003 .

[103]  S. Forrest,et al.  Reliability and degradation of organic light emitting devices , 1994 .

[104]  Z. Suo,et al.  Mechanics of rollable and foldable film-on-foil electronics , 1999 .

[105]  Furong Zhu,et al.  Building blocks for ultrathin flexible organic electroluminescent devices , 2002, SPIE Optics + Photonics.

[106]  Tatsuya Shimoda,et al.  21.3: Flexible Color AM‐OLED Display Fabricated Using Surface Free Technology by Laser Ablation/Annealing (SUFTLA®) and Ink‐jet Printing Technology , 2003 .

[107]  Kamala Rajan,et al.  Thin film encapsulated flexible organic electroluminescent displays , 2003 .

[108]  T. Beu,et al.  Gas transport through metallized polymer membranes , 1990 .