Application of self assembled monolayer technique to imporove hole transport in organic leds
tarafından
Şeker, Mavişe.
Başlık
:
Application of self assembled monolayer technique to imporove hole transport in organic leds
Yazar
:
Şeker, Mavişe.
Yazar Ek Girişi
:
Şeker, Mavişe.
Yayın Bilgileri
:
[s.l.]: [s.n.], 2011.
Fiziksel Tanımlama
:
xiv, 108 leaves.: ill. + 1 computer laser optical disc.
Özet
:
This thesis concentrates on the fabrication and characterization of highly efficient Organic Light-Emitting Diode (OLED) with surface modification of indium tin oxide (ITO) anodes by using self-assembled monolayer (SAM) technique. ITO has beencommonly used as an anode for OLEDs, because of the combination of high optical transparency and good electrical conductivity. That is why, ITO substrate is used in this study. On the other hand, the ITO film has often a rough surface, relatively low work function compared with the adjacent organic layer and its surface energy is not well matched to nonpolar organic film. For this purpose, in this work, eleven different SAM molecules were examined to modify ITO surface. Clearly, we aim to reduce the barrier of hole injection, lower the turn-on voltage and improve charge transfer characteristic at the anode-organic film interface using SAM molecules.The ITO work function with the SAM molecules was measured using Kelvin Probe Force Microscopy (KPFM). KPFM measurements were carried out to investigate if there is any increase in ITO work function. Atomic Force Microscopy (AFM) via semi-contact mode was examined the surface morphology of modified ITO. The transmittances of the ITOs with SAM were measured using an UV spectrometer. In addition to these surface analyses, the device performances were characterized by Keithley 236 and High-Resolution Spectrometer. Moreover, Space-Charge-Limited Current (SCLC) and Schottky models were used to analyze the I-V characteristics to calculate hole mobility and barrier heights, respectively.
Konu Başlığı
:
Light emitting diodes.
Organic thin films.
Organic semiconductors.
Yazar Ek Girişi
:
Okur, Salih. Thesis advisor.
Tüzel Kişi Ek Girişi
:
İzmir Institute of Technology. Physics.
Tek Biçim Eser Adı
:
Thesis (Master)--İzmir Institute of Technology:Physics.
İzmir Institute of Technology:Physics--Thesis (Master).
Elektronik Erişim
:
Library | Materyal Türü | Demirbaş Numarası | Yer Numarası | Durumu/İade Tarihi |
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IYTE Library | Tez | T000939 | QC611 .S463 2011 | Tez Koleksiyonu |