Improvement in carrier transport and recombination of white phosphorescent organic light-emitting devices using a composite blue emitter
Improvement in carrier transport and recombination of white phosphorescent organic light-emitting devices using a composite blue emitter
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DOI：
10.1063/1.2994697
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发表时间：
2008-10
影响因子：
4
通讯作者：
Meng‐Ting Lee;Jin-Sheng Lin;M. Chu;M. Tseng
中科院分区：
文献类型：
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作者：
Meng‐Ting Lee;Jin-Sheng Lin;M. Chu;M. Tseng
我们展示了基于黄色和复合蓝色发射体的高效白色磷光有机发光器件（PHOLED）。复合蓝色发射体由宽带隙主体、有机金属铱掺杂剂和载流子传输材料构成。在相同的驱动电流密度和发光颜色下，与仅由主体和掺杂剂组成的典型蓝色发射体相比，白色PHOLED的电流效率可提高1.4倍。在玻璃基板上贴附出耦合增强膜，可以实现在1000 cd/m2的实际亮度下，电流效率为47 cd/A、功率效率为32 lm/W、CIEx,y（CIE：国际照明委员会）为（0.40,0.44）的白色PHOLED。
We demonstrate high-efficiency white phosphorescent organic light-emitting devices (PHOLEDs) based on a yellow and composite blue emitters. The composite blue emitter is constructed from a wide-band-gap host, organometallic iridium dopant, and a carrier-transporting material. Under the same driving current density and emissive color, the current efficiency of the white PHOLEDs can be enhanced by a factor of 1.4 comparing to that of using typical blue emitter composed of host and dopant only. Attaching an outcoupling enhancement film onto glass substrate, the white PHOLEDs with a current efficiency of 47 cd/A, a power efficiency of 32 lm/W, and a CIEx,y (CIE: Commission Internationale d'Eclairage) of (0.40,0.44) at a practical brightness of 1000 cd/m2 can be achieved.