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Utilisation des nanoparticules pour l’amélioration des performances des sources organiques (OLED). AYENEW Getachew. Direction de thèse: Alexis Fischer et Azzedine Boudrioua, Encadrement : Mah moud Chakaroun, Nathalie Fabre Assistance technologique: Jeanne Solard. 23/03/2011.

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Utilisation des nanoparticules pour l’amélioration des performances des sources organiques (OLED)

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Utilisation des nanoparticules pour l am lioration des performances des sources organiques oled

Utilisation des nanoparticules pour l’amélioration des performances des sources organiques (OLED)

AYENEW Getachew

Direction de thèse: Alexis Fischer et Azzedine Boudrioua,

Encadrement : Mah moud Chakaroun, Nathalie Fabre

Assistance technologique: Jeanne Solard

23/03/2011


Major tasks

Major tasks:

  • Simulation (FDTD)

    • Practice the FTDT method (Fullwave of Rsoft)

  • Experiment

    • OLEDs and Nanoparticlesfor light extraction

      ( samplesfrom Taiwan )

  • Poster


Simulation

Simulation:

Objective :Study the response of photonic structure for excitations in different directions

Structure to be simulated: monolayer/multilayer of nanoparticles

Method: 3D FTDT

Excitation

Monitor

  • Detect the signal,

  • Transmision and reflectionspectras ( Fourier transform)


Simulation1

Simulation

  • 2D dielectric cylinder in Air:

ncylinder = 3.4

nbackground(air)=1

  • Simulation type: 2D FDTD

  • 2D PWE


Utilisation des nanoparticules pour l am lioration des performances des sources organiques oled

TE Polarization

  • TE PWE


Utilisation des nanoparticules pour l am lioration des performances des sources organiques oled

TM Polarization

No complete disappearance of detected signal, compared to TE case

 good agreement with Band diagram (PWE)


Nanoparticles and oleds light extraction

Nanoparticles and OLEDs : light extraction

  • Samples with Nanoparticle :

    • Nanoparticle deposition made in Taiwan

    • Size of nanoparticles: 1.3µm

  • Référencé Samples:

    • prepared in clean room

OLED structure: Glass/ITO/CUPC/TPD/AlQ 3/Al

  • Characterization :

  • Emission spectra ( intensity vs wavlength)

  • IVL characteristic

Result to beanalysed


Perspective

Perspective

  • 3D FDTD simulation for monolayer/multilayer of nanoparticles

  • Nanoparticles and OLEDs (light extraction)

    • Optical characterization

  • Self assembly of nano particles


Utilisation des nanoparticules pour l am lioration des performances des sources organiques oled

Thank you


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