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White light-emitting OLED device having a blue light-emitting layer doped with an electron-transporting or a hole-transporting material or both
White light-emitting OLED device having a blue light-emitting layer doped with an electron-transporting or a hole-transporting material or both
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机译：具有掺杂有电子传输或空穴传输材料或两者的蓝色发光层的发白光的OLED器件
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摘要
An organic light-emitting diode (OLED) device which produces substantially white light includes an anode; a hole-transporting layer disposed over the anode; and a blue light-emitting layer having a host doped with a blue light-emitting compound disposed directly on the hole-transporting layer and the blue light-emitting layer being doped with an electron-transporting or a hole-transporting material or both selected to improve efficiency and operational stability. The device also includes an electron-transporting layer disposed over the blue light-emitting layer; a cathode disposed over the electron-transporting layer; and the hole-transporting layer or electron-transporting layer, or both the hole-transporting layer and electron-transporting layer, being selectively doped with a compound which emits light in the yellow region of the spectrum which corresponds to an entire layer or a partial portion of a layer in contact with the blue light-emitting layer.
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