OLED manufacturing process and key technologies

The original text of OLED is Organic Light Emitting Diode, which means "organic light emitting display technology" in Chinese. The principle is that an organic light-emitting layer is sandwiched between the two electrodes, and the positive and negative electrons emit light when they meet

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COD meter product knowledge and principles (laboratory)

concept Chemical Oxygen Demand (Chemical Oxygen Demand) refers to the amount of oxidant consumed in the treatment of water samples with potassium dichromate as the oxidant under strong acid and heating conditions, expressed as mg/L of oxygen. It reflects the degree of contamination of the water b

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