用于具有常规器件结构的溶液处理串联有机发光二极管的电荷产生层。
Charge generation layers for solution processed tandem organic light emitting diodes with regular device architecture.
作者信息
Höfle Stefan, Bernhard Christoph, Bruns Michael, Kübel Christian, Scherer Torsten, Lemmer Uli, Colsmann Alexander
机构信息
†Light Technology Institute, Karlsruhe Institute of Technology (KIT), Engesserstrasse 13, 76131 Karlsruhe, Germany.
§Institute for Applied Materials, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
出版信息
ACS Appl Mater Interfaces. 2015 Apr 22;7(15):8132-7. doi: 10.1021/acsami.5b00883. Epub 2015 Apr 10.
Tandem organic light emitting diodes (OLEDs) utilizing fluorescent polymers in both sub-OLEDs and a regular device architecture were fabricated from solution, and their structure and performance characterized. The charge carrier generation layer comprised a zinc oxide layer, modified by a polyethylenimine interface dipole, for electron injection and either MoO3, WO3, or VOx for hole injection into the adjacent sub-OLEDs. ToF-SIMS investigations and STEM-EDX mapping verified the distinct functional layers throughout the layer stack. At a given device current density, the current efficiencies of both sub-OLEDs add up to a maximum of 25 cd/A, indicating a properly working tandem OLED.
采用溶液法制备了在两个子有机发光二极管（OLED）中均使用荧光聚合物且具有常规器件结构的串联OLED，并对其结构和性能进行了表征。电荷产生层包括一个由聚乙烯亚胺界面偶极修饰的氧化锌层，用于电子注入，以及用于向相邻子OLED注入空穴的MoO3、WO3或VOx。飞行时间二次离子质谱（ToF-SIMS）研究和扫描透射电子显微镜-能谱（STEM-EDX）映射验证了整个叠层中的不同功能层。在给定的器件电流密度下，两个子OLED的电流效率之和最高可达25 cd/A，表明串联OLED工作正常。
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