Koh Eun Im, Kim Dae Hun, Kim Tae Whan
J Nanosci Nanotechnol. 2015 Oct;15(10):8191-4. doi: 10.1166/jnn.2015.11262.
Tandem organic light-emitting devices (OLEDs) with a mixed organic n-type 4,4',4"-methylidynetris (N,N-dimethylaniline) and organic p-type 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile layer embedded into a charge generation layer (CGL) were fabricated to enhance their current efficiency. The operating voltage of the tandem OLEDs with a mixed layer at 10 mA/cm2 was 1 V lower than that of the tandem OLEDs without a mixed layer due to the electrons generated from the mixed layer. The matrix-assisted laser desorption-ionization-time-of-flight mass spectrometer spectra clarified the charge generation behaviors of the mixed layer into the CGL. The current efficiency of the tandem OLEDs with a mixed layer at 10 mA/cm2 was 48.2 cd/A, which was much larger than that without a mixed layer. The increase in the current efficiency for the tandem OLEDs was attributed to the enhancement of the electron injection efficiency in a CGL resulting from the insertion of the mixed layer.
制备了一种串联有机发光二极管（OLED），其电荷产生层（CGL）中嵌入了有机n型4,4',4''-亚甲基三（N,N-二甲基苯胺）和有机p型1,4,5,8,9,11-六氮杂三亚苯六腈的混合层，以提高其电流效率。由于混合层产生的电子，在10 mA/cm² 时具有混合层的串联OLED的工作电压比没有混合层的串联OLED低1 V。基质辅助激光解吸电离飞行时间质谱仪光谱阐明了混合层进入CGL的电荷产生行为。在10 mA/cm² 时具有混合层的串联OLED的电流效率为48.2 cd/A，远高于没有混合层的情况。串联OLED电流效率的提高归因于混合层的插入导致CGL中电子注入效率的提高。
