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利用磷光敏化和空穴阻挡层提高白光OLED性能

Properties Improvement of White Organic Light-emitting Devices by Using Phosphorescence Sensitizer and Hole-blocking Layer
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摘要 利用磷光敏化和BCP的空穴阻挡作用,制备了结构为:ITO/2T-NATA(15nm)/NPBX(20nm)/rubrene(0.2nm)/NPBX(5nm)/CBP∶6%Ir(ppy)3∶15%ADN(30nm)/BCP(10nm)/Alq3(25nm)/LiF(0.5nm)/Al的有机白光器件。器件在电压为7V的情况下,最大发光效率达到5.80cd/A,在12V的电压下最大亮度达12395cd/m2,色坐标为(0.30,0.30),接近白光等能点(0.33,0.33),比非敏化器件最大发光效率3.10cd/A(7V)和最大亮度10390cd/m2(12V)及非敏化不加空穴阻挡层BCP的器件最大发光效率2.13cd/A(8V)和最大亮度8852cd/m2(12V)的性能提高很多。 White organic light-emitting devices(WOLEDs), with the structure of ITO/2T- NATA(15 nm)/NPBX(20 nm)/rubrene(0.2 nm)/NPBX(5 nm)/CBP: 6% Ir(ppy)3: 15 %ADN (30 nm)/BCP(10 nm)/Alq3 (25 nm)/LiF(0. 5 nm)/Al, are fabricated by using phosphorescence sensitizer and hole-blocking layer. The devices show the maximum luminous efficiency of 5.80 cd/A at the applied voltage of 7 V and the highest brightness of 12 395 cd/m2 at the applied voltage of 12 V, with the commission international De L'Eclairage (CIE) coordinates of (0. 30, 0. 30) ,which is very close to the equal-energy white point (0.33, 0.33). The maximum luminous efficiency and the highest brightness of no-sensitizered devices are 3.10 cd/A(7 V) and 10 390 cd/ m2(12 V) respectively, while the two parameters for the devices with no sensitizer or hole- blocking layer are 2.13 cd/A(7 V) and 8 852 cd/m2 (12 V) respectively. The great improvements in performance are proved bv the experimental results.
出处 《半导体光电》 CAS CSCD 北大核心 2010年第1期38-41,共4页 Semiconductor Optoelectronics
基金 国家青年基金项目(10804036) 吉林省科技发展计划项目(20050523 20080528) 吉林省教育厅科研计划项目(吉教科合字[2003]第25号 吉教科合字[2004]第54号 吉教科合字[2009]第192号)
关键词 有机电致发光 敏化 空穴阻挡层 性能 OLED sensitizer hole-blocking layer performance of devices
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参考文献16

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