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Low-Temperature All-Solution-Processed Transparent Silver Nanowire-Polymer/AZO Nanoparticles Composite Electrodes for Efficient ITO-Free Polymer Solar Cells
journal contribution
posted on 2016-12-12, 17:33 authored by Xiaoqin Zhang, Jiang Wu, Jiantai Wang, Qingqing Yang, Baohua Zhang, Zhiyuan XieWe present a kind of all-solution-processed
transparent conductive film comprising of silver nanowire (AgNW),
polyvinyl butyral (PVB), and Al-doped ZnO nanoparticles (AZO NPs)
composite (APA) by layer-by-layer blade-coating on glass substrate
at low temperature. This kind of transparent APA film exhibits high
transmittance at a wide range of 400–700 nm. The sheet resistance
of the APA film can be as low as 21 Ω sq–1 with transmittance over 94% at 550 nm. The introduction of PVB significantly
improves the APA composite adhesion to glass substrate. The overlaid
coating of AZO NPs not only reduces the sheet resistance but also
improves the ambient and thermal stability of the APA film. This highly
conductive and transparent APA film on glass substrate is employed
as the bottom electrode to fabricate high-efficiency polymer solar
cells (PSCs). A power conversion efficiency of 8.98% is achieved for
the PBDTTT-EFT:PC71BM PSCs employing the APA composite
as transparent bottom electrode, close to 9.54% of the control device
fabricated on the commercial indium tin oxide substrate. As it can
be easily prepared with all-solution-processed blade-coating method
at low temperature, this kind of AgNW-based composite film is promising
to integrate with roll-to-roll manufacturing of flexible PSCs.