Mitigation of Electrical Failure of Silver Nanowires under Current Flow and the Application for Long Lifetime Organic Light-Emitting Diodes
Mitigation of Electrical Failure of Silver Nanowires under Current Flow and the Application for Long Lifetime Organic Light-Emitting Diodes
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DOI：
10.1002/aelm.201600167
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发表时间：
2016-08-01
影响因子：
6.2
通讯作者：
Pei, Qibing
中科院分区：
文献类型：
--
作者：
Chen, Dustin;Zhao, Fangchao;Pei, Qibing
报道了基于银纳米线（AgNW）透明导电电极的电稳定性增强的有机发光二极管（OLED）的延长寿命。具体而言，在深入调查的能力上进行原子层沉积沉积的氧化锌（ZnO）上AgNWs，使纳米线的电稳定的电应力在用于OLED照明的工作电流密度的范围内。已观察到ZnO涂覆的AgNW没有显示出电学、光学或形态学退化，而原始的AgNW电极由于在约150 mA cm（-2）下纳米线网络的电导率、透明度和碎片化的显著降低而变得不能用于光电器件。当制造成OLED基板时，与在氧化铟锡（ITO）/玻璃上制造的OLED相比，在ZnO-AgNW平台上制造的所得OLED表现出寿命增加140%，并且与在基于AgNW的基板上制造的OLED相比，寿命增加约20%。虽然ZnO涂覆的和原始的AgNW基底由于驱动器件所需的较低电流密度而优于ITO/玻璃，但与原始的AgNW基OLED相比，响应于电流应力的形态稳定性是ZnO-AgNW基OLED寿命提高的原因。
The extended lifetime of organic light-emitting diodes (OLEDs) based on enhanced electrical stability of a silver nanowire (AgNW) transparent conductive electrode is reported. Specifically, in depth investigation is performed on the ability of atomic layer deposition deposited zinc oxide (ZnO) on AgNWs to render the nanowires electrically stable during electrical stressing at the range of operational current density used for OLED lighting. ZnO-coated AgNWs have been observed to show no electrical, optical, or morphological degradation, while pristine AgNW electrodes have become unusable for opto-electronic devices due to dramatic decreases in conductivity, transparency, and fragmentation of the nanowire network at approximate to 150 mA cm(-2). When fabricated into OLED substrates, resulting OLEDs fabricated on the ZnO-AgNW platform exhibit a 140% increase in lifetime when compared to OLEDs fabricated on indium tin oxide (ITO)/glass, and approximate to 20% when compared to OLEDs fabricated on AgNW based substrates. While both ZnO-coated and pristine AgNW substrates outperform ITO/glass due to the lower current densities required to drive the device, morphological stability in response to current stressing is responsible for the enhancement of lifetime of ZnO-AgNW based OLEDs compared to pristine AgNW based OLEDs.