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US07888865B2 Organic electroluminescent device and display having multiple emitting layers 有权
有机电致发光器件和具有多个发射层的显示器

Organic electroluminescent device and display having multiple emitting layers
摘要:
An organic electroluminescent device including at least an anode, a first emitting layer, a hole barrier layer, a second emitting layer and a cathode in this order. The first emitting layer and the second emitting layer both include a hole transporting material. The organic EL device is small in chromaticity change and has high efficiency.
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