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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’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 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
slide7

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
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