| 摘要 |
A white electroluminescent (EL) device and a method of preparing the same, includes a substrate, a first electrode, a hole transporting unit having a predetermined transporting unit thickness, a blue emitting layer having a predetermined blue layer thickness, a yellow emitting layer, and a second electrode, such that the white EL device is capable of displaying pure white light having color coordinates of from about (0.27, 0.27) to about (0.39, 0.39).
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