Kim Dae Hun, Kim Tae Whan
J Nanosci Nanotechnol. 2015 Oct;15(10):8070-4. doi: 10.1166/jnn.2015.11261.
The electrical and optical properties of tandem organic light-emitting devices (OLEDs) fabricated utilizing an organic bis(ethylenedithio)-tetrathiafulvalene (BEDT-TTF) and 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile (HAT-CN) charge generation layer (CGL) were investigated to enhance their efficiency. While the operating voltage of the tandem OLEDs with a BEDT-TTF and HAT-CN CGL at 50 mA/cm2 was 11.2 V lower than that of the tandem OLEDs without a CGL, the current efficiency of the tandem OLEDs with a BEDT-TTF and a HAT-CN CGL at 50 mA/cm2 was 0.8 cd/A higher than that of the tandem OLEDs without a CGL. An increase in the current efficiency and a decrease in the operating voltage of the tandem OLEDs with a BEDT-TTF and an HAT-CN CGL were attributed to the enhancement of the electron injection due to its existence in the highest occupied molecular orbital level of the BEDT-TTF between the HAT-CN and the tris-(8-hydroxyquinoline)aluminum layer.
研究了利用有机双（乙撑二硫）-四硫富瓦烯（BEDT-TTF）和1,4,5,8,9,11-六氮杂三亚苯六腈（HAT-CN）电荷产生层（CGL）制备的串联有机发光二极管（OLED）的电学和光学性质，以提高其效率。在50 mA/cm² 时，具有BEDT-TTF和HAT-CN CGL的串联OLED的工作电压比没有CGL的串联OLED低11.2 V，而在50 mA/cm² 时，具有BEDT-TTF和HAT-CN CGL的串联OLED的电流效率比没有CGL的串联OLED高0.8 cd/A。具有BEDT-TTF和HAT-CN CGL的串联OLED的电流效率提高和工作电压降低归因于其存在于HAT-CN和三（8-羟基喹啉）铝层之间的BEDT-TTF的最高占据分子轨道能级中，从而增强了电子注入。
