Solvent-enhanced dye diffusion in polymer thin films for color tuning of organic light-emitting diodes

Pschenitzka, F.; Sturm, J. C.
April 2001
Applied Physics Letters;4/23/2001, Vol. 78 Issue 17, p2584
Academic Journal
A method of solvent-enhanced dye diffusion in polymer films for organic light-emitting diode (OLED) application is introduced. After an initial dye transfer from a dye source substrate into the top of the device polymer film, the device substrate is then exposed to solvent vapor. Due to solvent absorption by the polymer film, the glass transition temperature of the polymer is significantly decreased which leads to enhanced diffusion of the dye in the polymer film. Secondary ion mass spectroscopy and depth dependent photoluminescence show that the temperature for dye diffusion can be decreased by at least 100 °C, to room temperature. OLEDs with 0.6% external quantum efficiency have been demonstrated with this method using the polymer poly(9-vinylcarbazole) combined with electron transport molecules and the dyes coumarin 47 and coumarin 6. © 2001 American Institute of Physics.


Related Articles

  • Surface plasmons boost emission from dyed polymer. Wallace, John // Laser Focus World;Sep2005, Vol. 41 Issue 9, p36 

    Reports that researchers at the California Institute of Technology in Pasadena, California has applied surface plasmon resonance to boost the output of polymer dyes, which are useful for organic light emitting diodes. Exchange of energy between pump photons and surface plasmons; Higher...

  • Development and characterization of an efficient bio-white polymer light-emitting diode with red and green phosphorescent dyes as dopants. Madhwal, Devinder; Rait, S. S.; Kumar, A.; Verma, A.; Tada, K.; Onoda, M.; Bhatnagar, P. K.; Mathur, P. C. // Journal of Materials Science;Jun2010, Vol. 45 Issue 12, p3300 

    An efficient white polymer light-emitting diode (WPLED) with stable Commission Internationale de l’éclairage (CIE) coordinates is fabricated. A blue electroluminescence (EL)-emitting conducting polymer [poly(9,9-di- n-hexyl-fluorenyl-2,7-diyl)] is used as a host for red [...

  • Solvent-enhanced dye diffusion in polymer thin films for polymer light-emitting diode application. Graves-Abe, Troy; Pschenitzka, Florian; Jin, H. Z.; Bollman, Brent; Sturm, J. C.; Register, R. A. // Journal of Applied Physics;12/15/2004, Vol. 96 Issue 12, p7154 

    The method of solvent-enhanced dye diffusion for patterning full-color (red, green, and blue) polymer light-emitting diode displays was investigated in detail. After local dry transfer of dye onto a device polymer film, the dye remains on the surface of the polymer layer and must be diffused...

  • Poly(N-vinylcarbazole) doped with a pyrazoloquinoline dye: A deep blue light-emitting composite for light-emitting diode applications. Luszczynska, Beata; Dobruchowska, Ewa; Glowacki, Ireneusz; Ulanski, Jacek; Jaiser, Frank; Xiaohui Yang; Neher, Dieter; Danel, Andrzej // Journal of Applied Physics;1/15/2006, Vol. 99 Issue 2, p024505 

    We investigated the spectral properties of light-emitting diodes based on a deep blue-emitting pyrazoloquinoline dye doped into a poly(N-vinylcarbazole)-based matrix. Even though the electroluminescence (EL) of the host is redshifted and broadened with respect to the emission of the dye, the EL...

  • The role of poly(3,4-ethylenedioxythiophene):poly(styrenesulphonate) as a hole injection layer in a blue-emitting polymer light-emitting diode. Bange, Sebastian; Kuksov, Andriy; Neher, Dieter; Vollmer, Antje; Koch, Norbert; Ludemann, Aurelie; Heun, Susanne // Journal of Applied Physics;Nov2008, Vol. 104 Issue 10, p104506 

    The authors study the role of the conducting polymer poly(3,4-ethylenedioxythiophene): poly(styrenesulphonate) (PEDOT:PSS) in determining the transient and steady-state operation of a blue-emitting polymer light-emitting diode. Combining the results from photoemission spectroscopy,...

  • Three-color organic light-emitting diodes patterned by masked dye diffusion. Pschenitzka, Florian; Sturn, J.C. // Applied Physics Letters;3/29/1999, Vol. 74 Issue 13, p1913 

    Introduces a method of masked dye diffusion to locally pattern the emissive color of organic light-emitting devices (OLED) over a large area. Demonstration of the process of masked diffusion of dye into a polymer film of an OLED to create an integrated three-color device; Materials used to...

  • SIMS depth profiling of Mg back-diffusion in (AlGaIn)N light-emitting diodes. Kirste, Lutz; Köhler, Klaus; Maier, Manfred; Kunzer, Michael; Maier, Markus; Wagner, Joachim // Journal of Materials Science: Materials in Electronics;Oct2008 Supplement 1, Vol. 19, p176 

    The Mg doping profiles in close proximity to the (AlGaIn)N/GaN QW active region of group III-nitride light-emitting diodes grown by low pressure metal-organic vapor-phase epitaxy on sapphire substrates were investigated by secondary ion mass spectrometry (SIMS) depth profiling. The actual Mg...

  • Efficient electrophosphorescent polymer light-emitting devices using a Cs/Al cathode. Nakamura, A.; Tada, T.; Mizukami, M.; Yagyu, S. // Applied Physics Letters;1/5/2004, Vol. 84 Issue 1, p130 

    Efficient electrophosphorescent polymer light-emitting devices have been developed using a Cs/Al cathode. The materials used were a molecularly doped poly(9-vinylcarbazole)-emissive layer with electrophosphorescent complexes: bis[2-(2[sup ′]-benzothienyl)-pyridinato-N,C[sup 3[sup...

  • Doped organic light emitting diodes having a 650-nm-thick hole transport layer. Yamamori, Asuka; Adachi, Chihaya; Koyama, Toshiki; Taniguchi, Yoshio // Applied Physics Letters;4/27/1998, Vol. 72 Issue 17 

    We have succeeded in fabricating a thick-film organic light emitting diode having a doped hole transport layer (DHTL). The basic cell structure is anode DHTL/emitter layer/cathode. The DHTL is composed of a hole transporting polycarbonate polymer (PC-TPB-DEG) and tris(4-bromophenyl)aminium...


Read the Article


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

Try another library?
Sign out of this library

Other Topics