Electropolymerized Conjugated Polyelectrolytes with Tunable Work Function and Hydrophobicity as an Anode Buffer in Organic Optoelectronics
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- 作者：Sebastian Lacher ; Naoki Obata ; Shyh-Chyang Luo ; Yutaka Matsuo ; Bo Zhu ; Hsiao-hua Yu ; Eiichi Nakamura
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2012
- 出版时间：July 25, 2012
- 年：2012
- 卷：4
- 期：7
- 页码：3396-3404
- 全文大小：477K
- 年卷期：v.4,no.7(July 25, 2012)
- ISSN：1944-8252
文摘
A new class of conductive polyelectrolyte films with tunable work function and hydrophobicity has been developed for the anode buffer layer in organic electronic devices. The work function of these films featuring a copolymer of ethylenedioxythiophene (EDOT), and its functionalized analogues were found to be easily tunable over a range of almost 1 eV and reach values as high as those of PEDOT:PSS. The new buffer material does not need the addition of any insulating or acidic material that might limit the film conductivity or device lifetime. Organic photovoltaic devices built with these films showed improved open-circuit voltage over those of the known PSS-free conductive EDOT-based polymers with values as high as that obtained for PEDOT:PSS. Furthermore, the surface hydrophobicity of these new copolymer films was found to be sensitive to the chemical groups attached to the polymer backbone, offering an attractive method for surface energy tuning.