Conductivity Enhancement of PEDOT:PSS Films via Phosphoric Acid Treatment for Flexible All-Plastic Solar Cells

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• 作者：Wei Meng ; Ru Ge ; Zaifang Li ; Jinhui Tong ; Tiefeng Liu ; Qing Zhao ; Sixing Xiong ; Fangyuan Jiang ; Lin Mao ; Yinhua Zhou
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：July 1, 2015
• 年：2015
• 卷：7
• 期：25
• 页码：14089-14094
• 全文大小：472K
• ISSN：1944-8252

文摘

Highly conductive polymer films on plastic substrates are desirable for the application of flexible electronics. Here, we report the conductivity of poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) can be enhanced to 1460 S/cm via phosphoric acid (H₃PO₄) treatment. The conductivity enhancement is associated with the partial removal of PSS from the film. The H₃PO₄ treatment is compatible with plastic substrates, while sulfuric acid (H₂SO₄) can easily damage the plastic substrate. With the flexible electrode of poly(ether sulfone) (PES)/H₃PO₄-treated PEDOT:PSS, we have demonstrated flexible all-plastic solar cells (PES/H₃PO₄-treated PEDOT:PSS/PEI/P3HT:ICBA/EG-PEDOT:PSS). The cells exhibit an open-circuit voltage of 0.84 V, a fill factor of 0.60, and a power conversion efficiency of 3.3% under 100 mW/cm² white light illumination.