Inverted Layer-By-Layer Fabrication of an Ultraflexible and Transparent Ag Nanowire/Conductive Polymer Composite Electrode for Use in High-Performance Organic Solar Cells
Inverted Layer-By-Layer Fabrication of an Ultraflexible and Transparent Ag Nanowire/Conductive Polymer Composite Electrode for Use in High-Performance Organic Solar Cells
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DOI：
10.1002/adfm.201501046
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发表时间：
2015-08-05
影响因子：
19
通讯作者：
Kim, Jong-Woong
中科院分区：
文献类型：
--
作者：
Kim, Youngmin;Ryu, Tae In;Kim, Jong-Woong
利用逐层倒置加工方法，获得了一种基于完全嵌入无色聚酰亚胺(CPI)的导电聚合物(CP)和银纳米线(AgNW)连续堆叠的高度柔韧和透明的导电电极。这种Cp-AgNW复合电极在450-700 nm处的透过率高达92%，电阻率为7.7？(-1)，其超光滑的表面为导电路径提供了很大的接触面积。此外，这种复合电极在向外和向内弯曲到40m半径时都表现出前所未有的高柔韧性和良好的机械耐用性。随后将该复合电极应用于有机太阳能电池中，获得了高达7.42%的功率转换效率，比单纯将AgNW嵌入CPI中有了显著的提高。这归因于双分子复合的减少和电荷收集效率的提高，从而产生了与基于铟锡氧化物的器件相当的性能。更重要的是，较高的机械稳定性意味着，在弯曲(
A highly flexible and transparent conductive electrode based on consecutively stacked layers of conductive polymer (CP) and silver nanowires (AgNWs) fully embedded in a colorless polyimide (cPI) is achieved by utilizing an inverted layer-by-layer processing method. This CP-AgNW composite electrode exhibits a high transparency of >92% at wavelengths of 450-700 nm and a low resistivity of 7.7 ?(-1), while its ultrasmooth surface provides a large contact area for conductive pathways. Furthermore, it demonstrates an unprecedentedly high flexibility and good mechanical durability during both outward and inward bending to a radius of 40 m. Subsequent application of this composite electrode in organic solar cells achieves power conversion efficiencies as high as 7.42%, which represents a significant improvement over simply embedding AgNWs in cPI. This is attributed to a reduction in bimolecular recombination and an increased charge collection efficiency, resulting in performance comparable to that of indium tin oxide-based devices. More importantly, the high mechanical stability means that only a very slight reduction in efficiency is observed with bending (