Microcavity two-unit tandem organic light-emitting devices having a high efficiency
Microcavity two-unit tandem organic light-emitting devices having a high efficiency
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DOI：
10.1063/1.2185077
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发表时间：
2006-03-13
影响因子：
4
通讯作者：
Wu, CC
中科院分区：
文献类型：
--
作者：
Cho, TY;Lin, CL;Wu, CC
为了进一步提高有机发光器件（OLED）的亮度和效率，值得探索通过组合两种亮度增强技术（即，微腔和串联OLED。本文从理论和实验两方面研究了无腔和微腔串联有机发光二极管的特性。结果表明，通过良好设计的微腔和器件结构（即，与谐振和波腹条件一致），利用仅具有两个发射单元的腔串联器件可以实现亮度的五倍增强。一个非常高的效率为200 cd/A已被证明与磷光腔两个单元的设备。
In pursuit of further enhancement in luminance and efficiency of organic light-emitting devices (OLEDs), it is worth exploring what benefits could be obtained by combining two luminance-enhancement techniques, i.e., microcavity and tandem OLEDs. In this letter, we have investigated theoretically and experimentally the characteristics of noncavity and microcavity tandem OLEDs. Results show that with well designed microcavity and device structures (i.e., consistent with resonant and antinode conditions), a fivefold enhancement in luminance can be achieved with cavity tandem devices having only two emitting units. A very high efficiency of 200 cd/A has been demonstrated with a phosphorescent cavity two-unit device.