Introducing a hole injection layer between the ITO and emitting layer can enhance both the luminance and efficiency of a WOLED. In addition to the hole injection layer, it is found that inserting p-type doped HTL (NPB:F4-TCNQ) between HIL and EML using the spin- coating method can also improve luminance and efficiency. Furthermore, by optimizing and adjusting the dopant ratio and thickness of p-type doped HTL, the luminance reaches 393.1 cd/m2, the current efficiency reaches 1.32 cd/A under 9V voltage, and the OLED lifetime (half-value period) increases from the original 0.8 hours to 2 hours. |
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Organic light emitting diodes
Doping
Coating
Electro optics
Laser induced fluorescence
Manufacturing
Fluorescent materials