Enhancement of surface potential buildup and decay of tris(8-quinolinato)aluminum film deposited on ultraviolet/ozone-treated gold electrodes
The enhancement of the surface potential of tris(8-quinolinato)aluminum (Alq3) film deposited on ultraviolet (UV)/ozonetreated gold electrodes was confirmed by surface potential measurement, and the ordering of molecular dipoles was suggested. The enhanced surface potential of the order of 10 V deca...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Published: |
IOP Publishing
2005
|
| Subjects: | |
| Online Access: | http://eprints.um.edu.my/7352/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The enhancement of the surface potential of tris(8-quinolinato)aluminum (Alq3) film deposited on ultraviolet (UV)/ozonetreated gold electrodes was confirmed by surface potential measurement, and the ordering of molecular dipoles was suggested. The enhanced surface potential of the order of 10 V decayed rapidly by photo irradiation, due to molecular dipole disordering, but a surface potential of 100-400mV remained. Interestingly, this remaining surface potential of Alq3 on the UV/ozonetreated gold electrode was always smaller than that of Alq3 film on an untreated gold electrode. It was concluded that the UV/ozone treatment is effective in decreasing the density of surface states at the Alq3-metal interface as well as for the enhancement of molecular dipole ordering. |
|---|