Abstract
Based on indium tin oxide (ITO)/N,N′diphenyl-N-N′-di(m-tdyl) benzidine (TPD)/Alq3/Al structure, flexible OLEDs on polyethylene terephthalate (PET) substrates were fabricated by physical vapor deposition (PVD) method. Tris(8-hydroxyquinoline)aluminum (Alq3) films were deposited at 90, 120 and 150 °C to examine the influence of the deposition temperature on the structure and performance of OLEDs. Electroluminescence (EL) spectra and current-voltage-luminance (I-V-L) characteristics of the OLEDs were examined. It was found that the device fabricated at a high temperature had a higher external efficiency and longer lifetime. Atomic force microscope (AFM) was adopted to characterize the surface morphology of ITO/TPD/Alq3. The higher uniform morphology of the Alq3formed at high temperature might contribute to the performance improvement of the OLEDs.
Original language | English |
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Pages (from-to) | 4463-4466 |
Number of pages | 4 |
Journal | Applied Surface Science |
Volume | 253 |
Issue number | 10 |
DOIs | |
Publication status | Published - 15 Mar 2007 |
Keywords
- AFM
- Alq 3
- Organic light-emitting device
- PVD
ASJC Scopus subject areas
- Surfaces, Coatings and Films