High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer
High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer
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基于本体异质结有机双极电荷产生层的高功率效率串联有机发光二极管
DOI：
10.1063/1.3599557
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发表时间：
2011-06-13
影响因子：
4
通讯作者：
Zhu, Furong
中科院分区：
文献类型：
--
作者：
Chen, Yonghua;Chen, Jiangshan;Zhu, Furong
采用酞菁锌（ZnPc）和富勒烯（C60）共混物作为有机双极性电荷产生层（CGL），可以显著提高串联有机电致发光器件（OLED）的功率效率。除了亮度和电流效率的显着提高外，这项工作还为串联OLED产生了21 lm W−1的最大功率效率，特别是几乎是单单元器件的两倍，最大功率效率为10.1 lm W−1。 在较高亮度下的功率效率的提高也超过50%。功率效率的显著提高归因于由于界面改性的ZnPc：C60 CGL在串联OLED中的存在而导致的有效的电荷产生、传输和提取。我们的研究结果表明，体异质结，由两个匹配的n-和p-型有机半导体，是一个有前途的双极CGL的高功率效率串联OLED。
The significant enhancement in power efficiency of tandem organic light-emitting diodes (OLEDs) was achieved using bulk heterojunction organic bipolar charge generation layer (CGL), consisted of zinc phthalocyanine (ZnPc): fullerene (C60) blend. In addition to a significant enhancement in luminance and current efficiency this work yielded a maximum power efficiency of 21 lm W−1 for a tandem OLED, notably almost two times higher than that of a single-unit device, with a maximum power efficiency of 10.1 lm W−1. The enhancement in power efficiency at higher luminance is also over 50%. The remarkable enhancement in power efficiency has been attributed to the effective charge generation, transport and extraction due to the presence of interface-modified ZnPc:C60 CGL in tandem OLEDs. Our results demonstrate that the bulk heterojunction, consisting of two matched n- and p-type organic semiconductors, is a promising bipolar CGL for high power efficiency tandem OLEDs.