Molybdenum oxide anode buffer layers for solution processed, blue phosphorescent small molecule organic light emitting diodes
Molybdenum oxide anode buffer layers for solution processed, blue phosphorescent small molecule organic light emitting diodes
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DOI：
10.1016/j.orgel.2013.04.017
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发表时间：
2013-07
影响因子：
3.2
通讯作者：
S. Hoefle;H. Do;E. Mankel;M. Pfaff;Zhenhao Zhang;Daniel Bahro;T. Mayer;W. Jaegermann;D. Gerthsen-D
中科院分区：
文献类型：
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作者：
S. Hoefle;H. Do;E. Mankel;M. Pfaff;Zhenhao Zhang;Daniel Bahro;T. Mayer;W. Jaegermann;D. Gerthsen-D
在这项工作中，我们提出了溶液处理的有机发光二极管（OLED），包括小分子，蓝色磷光发射层从双（4，6-二氟苯基吡啶-N，C2）吡啶铱掺杂的4，4 ′，4 ″-三（咔唑-9-基）-三苯胺和三氧化钼（MoO 3）阳极缓冲层。后者是从一种在中等温度下热转化为MoO 3的乙醇铵（V）前体溶液中应用的。高功函数的MoO 3促进空穴注入到发光层中。利用能量色散X射线能谱、X射线光电子能谱、紫外光电子能谱和Kelvin探针力显微镜对MoO 3薄膜的性能进行了研究。MoO 3缓冲层的性能上级常用的聚（3，4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐），并能够提高OLED器件的效率。
In this work we present solution processed organic light emitting diodes (OLEDs) comprising small molecule, blue phosphorescent emitter layers from bis(4,6-difluorophenylpyridinato-N,C2)picolinatoiridium doped 4,4′,4″-tris(carbazol-9-yl)-triphenylamine and molybdenum trioxide (MoO3) anode buffer layers. The latter were applied from a molybdenium(V)ethoxide precursor solution that was thermally converted to MoO3at moderate temperatures. The high work function MoO3facilitated hole injection into the emission layer. The MoO3layer properties were investigated by means of energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy and Kelvin probe force microscopy. MoO3buffer layers performed superior to the commonly used poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) and enabled an enhanced OLED device efficiency.