Novel organic light-emitting diode design for future lasing applications
Novel organic light-emitting diode design for future lasing applications
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DOI：
10.1016/j.orgel.2017.05.048
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发表时间：
2017-09
影响因子：
3.2
通讯作者：
I. Slowik;A. Fischer;H. Fröb;Simone Lenk;S. Reineke;K. Leo
中科院分区：
文献类型：
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作者：
I. Slowik;A. Fischer;H. Fröb;Simone Lenk;S. Reineke;K. Leo
达到高电流密度是实现电驱动有机半导体激光器（OSL）的基本要求。这需要高导电性（通常是金属）电极，另一方面，这会导致不希望的光损耗。在这里，我们介绍了一个有机发光二极管（OLED）的概念，其中层序列进行重组，以集中和最大限度地提高电流在无金属区域。因此，我们不仅避免了金属电极的寄生吸收，而且还大大降低了功耗。这些器件能够实现比标准OLED设计更高的电流密度，这是由于有源区域自动缩小到适当尺寸而减少了自加热。它们还允许集成到有机微腔中。因此，新概念非常适合于在未来实现电驱动的OSL。
Reaching high current densities is an essential need to achieve electrically driven organic semiconductor lasers (OSLs). This requires highly conductive (usually metallic) electrodes which on the other hand cause unwanted optical losses. Here, we introduce a concept for organic light-emitting diodes (OLEDs) where the layer sequence is restructured in order to concentrate and maximize the current flow in a metal-free area. Thus, we do not only avoid parasitic absorption by the metal electrodes, but also drastically reduce the power dissipation. These devices enable higher current densities than the standard OLED design due to reduced self-heating as a consequence of an active area which automatically shrinks down to an appropriate size. They further allow for integration into an organic microcavity. Therefore, the new concept is well suited to realize an electrically driven OSL in future.