What are the causes of black spot formation?
* Question
| What are the causes of black spot formation? |
* Answer
| (1) The thermal effect of the organic functional layer of the device, the thermal instability of the organic functional thin layer, resulting in the formation of dark spots.4) Oxygen itself is a quencher of triplet state. At the same time, in the process of OLED luminescence, after the organic molecule reacts with oxygen, the carbonyl substance produced is also a quencher, and the luminous efficiency of the device is reduced by the compound;The organic functional layer of the device is easily hydrolyzed with water vapor. |
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