PEDOT layer spin coat recipe

PEDOT solution is Baytron P VP CH 8000, solid content about 2.5%.
The following recipe is used for preparing OLED with F8BT as the active material.

1. First dilute with DI water to about 1.5% by adding 0.6 ml DI water into 1 ml original solution.
2. Use a syringe with a 0.2 micron PVDF membrane syringe filter to filter the prepared solution.
PVDF is hydrophilic and is good for aqueous solution filtering. Do not use hydrophobic membrane filters, such as PTFE.
3. Spin time is 30 sec. For spin speed of about 3,500 - 4,000 rpm, the film thickness before baking is ~ 40 nm.
4. Hotplate bake for 60 minutes at 150C.