Improvement of electron injection in inverted bottom-emission blue phosphorescent organic light emitting diodes using zinc oxide nanoparticles
Improvement of electron injection in inverted bottom-emission blue phosphorescent organic light emitting diodes using zinc oxide nanoparticles
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DOI：
10.1063/1.3400224
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发表时间：
2010-04-12
影响因子：
4
通讯作者：
Lee, Changhee
中科院分区：
文献类型：
--
作者：
Lee, Hyunkoo;Park, Insun;Lee, Changhee
我们制备了高效的铱（III）双[（4，6-二氟苯基）-吡啶基-N，C2（'）]吡啶甲酸盐掺杂的倒置底部发射蓝色磷光有机发光二极管，其具有氧化锌（ZnO）纳米颗粒（NP）的电子注入层。ZnO纳米颗粒层降低了约4V的开启电压，并显着提高了效率。具有ZnO NP的器件显示出16.5cd/A和8.2%的峰值效率，比没有ZnO NP的器件的峰值效率高约三倍。由于ZnO NPs层具有宽的带隙、良好的电子传输特性和低的功函数，因此它可以用作具有良好透明度的有效电子注入层。
We fabricated highly efficient iridium(III) bis[(4,6-di-fluorophenyl)-pyridinato-N,C2(')] picolinate doped inverted bottom-emission blue phosphorescent organic light-emitting diodes, with an electron injection layer of zinc oxide (ZnO) nanoparticles (NPs). The ZnO NPs layer lowers the turn-on voltage by about 4 V and significantly enhances the efficiency. The device with ZnO NPs shows peak efficiencies of 16.5 cd/A and 8.2%, about three times higher than those of the device without ZnO NPs. Since the ZnO NPs layer has a wide band gap, good electron transporting properties and low work function, it can be utilized as an effective electron injection layer with good transparency.