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中文摘要：
制备了多层结构合成的白光有机电致发光器件(WOLEDs),通过在发光层中加入一层空穴阻挡层TPBi来提高器件的光谱稳定性。当TPBi厚度为2.5 nm时,在电压由8 V升高到12 V的过程中,CIE色坐标的变化量为(0.031,0.006)。器件的电流效率为24.7 cd/A,外部量子效率最大为8.2%。相对于没有加入中间层的器件,8 V电压下的色坐标由(0.435,0.472)变为(0.333,0.439)。实验结果表明,在发光层中添加中间层可以改变器件发光的色坐标并提升光谱的稳定性。
英文摘要：
The multilayer structure of phosphorescent organic white light-emitting devices( WOLEDs) were fabricated, and the spectral stability was enhanced by adding hole-blocking layer ( TPBi) in the light emitting layer. When the thickness of TPBi is 2. 5 nm, the change of CIE coordinate is (0. 031, 0. 006) during the voltage changing from 8 to 12 V. In addition, the current efficiency is 24. 7 cd/A, and the maximum external quantum efficiency is 8. 2%. Compared with the device without hole-bloc-king layer, the CIE coordinate changes from (0. 435, 0. 472) to (0. 333, 0. 439) while the voltage is 8 V. The experiment results show that the CIE coordinate can be changed and the spectral stability can be enhanced by adding an interlayer in the light emitting layer.
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