Research Article

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2018, 11(4): 1956–1966

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https://doi.org/10.1007/s12274-017-1812-z

Semi-transparent polymer solar cells with all-copper nanowire electrodes

Haitao Zhai1,2, Yang Li3, Liwei Chen3, Xiao Wang1,2, Liangjing Shi1, Ranran Wang1 (*), and Jing Sun1 (*)

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1 the State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China

Keywords: Cu nanowires, transparent electrode, semi-transparent polymer solar cells, lamination
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ABSTRACT Transparent electrodes based on copper nanowires (Cu NWs) have attracted significant attention owing to their advantages including high optical transmittance, good conductivity, and excellent mechanical flexibility. However, low-cost, high-performance, and environmental friendly solar cells with all-Cu NW electrodes have not been realized until now. Herein, top and bottom transparent electrodes based on Cu NWs with low surface roughness and homogeneous conductivity are fabricated. Then, semi-transparent polymer solar cells (PSCs) with the inverted structure of polyacrylate/Cu NWs/poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) (PH1000)/Y-TiO2/ poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid 3,4,5-tris(octyloxy)benzyl/ PEDOT:PSS (4083)/Cu NWs/polyimide/polydimethylsiloxane are constructed; these could absorb light from both sides with a power conversion efficiency reaching 1.97% and 1.85%. Furthermore, the PSCs show an average transmittance of 42% in the visible region, which renders them suitable for some specialized applications such as power-generating windows and building-integrated photovoltaics. The indium tin oxide (ITO)- and noble metal-free PSCs could pave new pathways for fabricating cost-effective semi-transparent PSCs.
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Semi-transparent polymer solar cells with all-copper nanowire electrodes. Nano Res. 2018, 11(4): 1956–1966 https://doi.org/10.1007/s12274-017-1812-z

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