期刊
ADVANCED FUNCTIONAL MATERIALS
卷 25, 期 29, 页码 4580-4589出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201501046
关键词
composite electrodes; conductive polymers; flexible transparent electrodes; organic solar cells; silver nanowires
类别
资金
- Global Frontier R&D Program of the Center for Multiscale Energy System - National Research Foundation of the Ministry of Science [2N39300]
- Technology Innovation Program - Ministry of Trade, Industry Energy, Korea [10042412]
- Korea Institute of Science and Technology (KIST) [2V034000, 2E25392]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea Government Ministry of Trade, Industry Energy (MTIE) [20113030010030]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20113030010030] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Science, ICT & Future Planning, Republic of Korea [2V04000, 2E25392] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2012M3A6A7054856] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 (<5%) to a radius of 40 m. This newly developed composite electrode is therefore expected to be directly applicable to a wide range of high-performance, low-cost flexible electronic devices.
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