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Organic light-emitting diodes with varying thickness of bathocuproine layer

机译：碱性磷酸铜盐层厚度不同的有机发光二极管

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摘要

A series of organic light-emitting diodes (OLEDs) with or without a bathocuproine (BCP) layer inserted in the control device indium-tin-oxide (ITO) N,N'-bis-(1-naphthl)-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) tris(8-quinolinolato) aluminum (Alq)LiFAl have been fabricated and measured. Different influences of the BCP layer on electroluminescence (EL) of the OLEDs have been investigated. It is found that the highest efficiency of the OLED with a 1-nm BCP layer inserted between NPB and Alq increases to 3.99 cd/A, ～48% higher than that of the control device, while the EL efficiencies of the devices with other structures are similar to the latter. This phenomenon is ascribed to the hole-blocking effect of the BCP layer and the resulting higher density of carriers in the emission zone of the OLED. The EL performances of the OLEDs with different thicknesses of BCP layer are also discussed in details.
机译：一系列有机发光二极管（OLED），其在控制设备中插入或不插入浴铜（BCP）层氧化铟锡（ITO）N，N'-双-（1-萘基）-联苯-1，制备并测量了1'-联苯基-4,4'-二胺（NPB）三（8-喹啉基）铝（Alq）LiFAl。已经研究了BCP层对OLED的电致发光（EL）的不同影响。发现在NPB和Alq之间插入1nm BCP层的OLED的最高效率提高到3.99 cd / A，比控制装置的效率高约48％，而其他结构的装置的EL效率高与后者相似。这种现象归因于BCP层的空穴阻挡效应以及在OLED的发射区中所导致的更高载流子密度。还详细讨论了具有不同BCP层厚度的OLED的EL性能。

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