ITO glass cleaning and surface treatment specific circumstances TFT Display Modules

ITO as male surface extremely state directly affect the interface between the electron state in the hole injection and an organic thin film layer and the film-forming properties of the organic material. If the ITO surface is dirty, the surface free energy becomes small, resulting deposited on the aggregation at the hole-transporting material, the film forming unevenness.240x64 lcd display
The ITO surface treatment process: detergent washing → the ethanol washing → washing → acetone washed with pure water, ultrasonic cleaning machine cleaning, each wash washed 5 minutes, stopped for 5 minutes, were repeated three times. And then use the infrared oven drying stand. Needs to be carried out on the ITO glass was washed surface activation treatment in order to increase the oxygen content of the ITO surface layer, to improve the work function of the ITO surface.
Can also use the ratio of water: hydrogen peroxide: aqueous ammonia = 5:1:1 mixture of hydrogen peroxide solution of the ITO surface of the ITO surface excess tin content reduced the increase in the proportion of oxygen in order to improve the work function of the ITO surface to increase the empty The probability of hole injection, an order of magnitude allows the brightness of the OLED device.
ITO glass before use should be after the surface treatment of the ultraviolet ray - ozone "or" plasma ", the main purpose is to remove the organic residue of the surface of the ITO, to procure ITO surface oxidation to increase the work function of the ITO surface, to improve the flatness of the surface of the ITO. Untreated ITO surface work function of about 4.6eV, 5.0eV above, the luminous efficiency and the working life are improved after UV - ozone or plasma surface treated ITO surface work function. On the surface of the ITO glass processing must be carried out in a dry vacuum environment, treated ITO glass can not be placed in the air for long, otherwise the surface of the ITO will lose activity.128x64 lcd module