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采用真空蒸镀的方法,制备了以ADN为发光层的高效率非掺杂蓝色有机电致发光器件。器件的结构为ITO/2T-NATA(15 nm)/NPBx(15 nm)/ADN(25+dnm)/BCP(8 nm)/Alq3(30 nm)/LiF(0.5 nm)/Al。通过调整ADN层的厚度,研究了器件的发光性能。测试结果表明,器件在6 V电压时电流效率达到最大,为2.77 cd/A;在16 V时亮度达到最大,为7 227 cd/m2。当ADN的厚度为30 nm、器件的电压从5 V变化到16 V时,色坐标在(0.21,0.32)至(0.19,0.29)之间,均在蓝光区域。
Using vacuum evaporation method, a high efficiency non-doped blue organic electroluminescent device with ADN as the light-emitting layer was prepared. The structure of the device is ITO / 2T-NATA (15 nm) / NPBx (15 nm) / ADN (25 + dnm) / BCP (8 nm) / Alq3 (30 nm) / LiF (0.5 nm) / Al. By adjusting the thickness of the ADN layer, the luminescent properties of the devices were studied. The test results show that the device achieves the maximum current efficiency of 2.77 cd / A at 6 V and the maximum brightness of 7 227 cd / m2 at 16 V. When the ADN thickness is 30 nm and the voltage of the device changes from 5 V to 16 V, the color coordinates are in the range of (0.21,0.32) to (0.19,0.29), all in the blue region.