Lifetime of organic light emitting diodes on polymer anodes

Fehse, Karsten; Meerheim, Rico; Walzer, Karsten; Leo, Karl; Lövenich, Wilfried; Elschner, Andreas
August 2008
Applied Physics Letters;8/25/2008, Vol. 93 Issue 8, p083303
Academic Journal
We report on the use of a thin layer of poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) as anode for bottom emission organic light emitting diodes (OLEDs). The combination of polymer anodes with OLEDs having either electrically doped or undoped hole transport layers in direct contact with the polymer is shown. We discuss the impact of the annealing conditions of the polymer on the OLED lifetime in comparison to indium tin oxide anodes. Supported by a differential thermal analysis of PEDOT:PSS, a strong influence of residual water in the polymer on the device lifetime is found. Additional heating of the polymer anode in a dry ambient prior to OLED deposition is necessary to achieve high device lifetimes. At a luminance of 260 cd/m2, pin-OLEDs on a PEDOT:PSS anode show no measurable device degradation during 5200 h of operation.


Related Articles

  • Molecular organic light-emitting diodes using highly conducting polymers as anodes. Kim, W. H.; Ma¨kinen, A. J.; Nikolov, N.; Shashidhar, R.; Kim, H.; Kafafi, Z. H. // Applied Physics Letters;5/20/2002, Vol. 80 Issue 20, p3844 

    Films fabricated from commercially available poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) aqueous dispersions have been widely used in many electronic and optoelectronic applications. Previous attempts to utilize them as anodes in organic light-emitting diodes (OLEDs) were...

  • Highly flexible transparent electrodes for organic light-emitting diode-based displays. Lewis, Jay; Grego, Sonia; Chalamala, Babu; Vick, Erik; Temple, Dorota // Applied Physics Letters;10/18/2004, Vol. 85 Issue 16, p3450 

    Multilayer indium-tin-oxide (ITO)–Ag–ITO stacks were evaluated as transparent conductors for flexible organic light-emitting diode (OLED) displays. The ITO–metal–ITO (IMI) samples exhibited significantly reduced sheet resistance over ITO and greater than 80% optical...

  • Graphene as anode electrode for colloidal quantum dots based light emitting diodes. Klekachev, Alexander V.; Kuznetsov, Sergey N.; Asselberghs, Inge; Cantoro, Mirco; Hun Mun, Jeong; Jin Cho, Byung; Stesmans, André L.; Heyns, Marc M.; De Gendt, Stefan // Applied Physics Letters;7/22/2013, Vol. 103 Issue 4, p043124 

    Graphene films demonstrating low sheet resistance and high transparency in the visible light range are promising to be used as electrodes for light-emitting applications. In this work, we report the implementation of single layer graphene as hole injecting electrode for CdSe/ZnS quantum...

  • The effect of the hole injection layer on the performance of single layer organic light-emitting diodes. Zeng Wenjin; Bi Ran; Zhang Hongmei; Huang Wei // Journal of Applied Physics;2014, Vol. 116 Issue 22, p224502-1 

    Efficient single-layer organic light-emitting diodes (OLEDs) were reported based on a green fluorescent dye 10-(2-benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1) benzopyropyrano (6,7-8-I,j)quinolizin-11-one (C545T). Herein, poly(3,4-ethylenedioxy thiophene) poly(styrene...

  • Ohmic hole injection in poly(9,9-dioctylfluorene) polymer light-emitting diodes. Poplavskyy, D.; Nelson, J.; Bradley, D. D. C. // Applied Physics Letters;7/28/2003, Vol. 83 Issue 4, p707 

    Here we report the observation of ohmic hole injection from a conducting polymer anode into poly(9,9-dioctylfluorene) in a polymer light-emitting diode structure. Although initially nonohmic, the contact can be made locally ohmic by electrically conditioning the device at voltages higher than...

  • Flexible top-emitting electroluminescent devices on polyethylene terephthalate substrates. Yanqing Li; Li-Wei Tan; Xiao-Tao Hao; Kian Soo Ong; Furong Zhu; Liang-Sun Hung // Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p153508 

    An aluminum-laminated polyethylene terephthalate (Al-PET) is used as the substrate for flexible organic light-emitting devices (OLEDs). The efficient flexible electroluminescent devices have a top-emitting OLED architecture. An acrylic layer is formed on the Al-PET surface to improve the surface...

  • Fully bendable polymer light emitting devices with carbon nanotubes as cathode and anode. Yu, Zhibin; Hu, Liangbing; Liu, Zhitian; Sun, Mingliang; Wang, Meiliang; Grüner, George; Pei, Qibing // Applied Physics Letters;11/16/2009, Vol. 95 Issue 20, p203304 

    Polymer light emitting devices were fabricated by roll lamination using single-walled carbon nanotubes as both anode and cathode. The devices exhibited a low turn-on voltage of 3.8 V, high brightness of 1400 cd/m2 at 10 V and maximum efficiency of 2.2 cd/A at 480 cd/m2. The devices are also...

  • Combination of a polyaniline anode and doped charge transport layers for high-efficiency organic light emitting diodes. Fehse, Karsten; Schwartz, Gregor; Walzer, Karsten; Leo, Karl // Journal of Applied Physics;6/15/2007, Vol. 101 Issue 12, p124509 

    Up to now, most organic light emitting diodes (OLEDs) have utilized inorganic materials as transport anodes. In this study, we show that conductive polymers are suitable for this purpose as well. Polyaniline anodes, with a conductivity of 200 S/cm, are used to inject holes into the adjacent...

  • Enhanced stability against bias-stress of metal-oxide thin film transistors deposited at elevated temperatures. Fakhri, M.; Görrn, P.; Weimann, T.; Hinze, P.; Riedl, T. // Applied Physics Letters;9/19/2011, Vol. 99 Issue 12, p123503 

    Transparent zinc-tin-oxide (ZTO) thin film transistors (TFTs) have been prepared by DC magnetron sputtering. Compared to reference devices with a channel deposited at room temperature and subsequently annealing at 400 °C, a substantially enhanced stability against bias stress is evidenced for...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics