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1.中国科学院上海硅酸盐研究所 能量转换材料重点实验室 上海 201899
2.上海第二工业大学环境与材料工程学院 上海 201209
Published:2019-1,
Published Online:1 September 2018,
Received:23 July 2018,
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Di Xu, Hu-jiang Shen, Jun-jie Xie, Wei Wang, Hui-hui Yuan, Yu-yu Li, Tao Zhang, Xin-yu Chen, Yun-long He, Yu-mei Zhang. Screen Printing, Modification via Post-treatment and Application in Dye-sensitized Solar Cells of PEDOT:PSS Films. [J]. Acta Polymerica Sinica 50(1):36-43(2019)
Di Xu, Hu-jiang Shen, Jun-jie Xie, Wei Wang, Hui-hui Yuan, Yu-yu Li, Tao Zhang, Xin-yu Chen, Yun-long He, Yu-mei Zhang. Screen Printing, Modification via Post-treatment and Application in Dye-sensitized Solar Cells of PEDOT:PSS Films. [J]. Acta Polymerica Sinica 50(1):36-43(2019) DOI: 10.11777/j.issn1000-3304.2018.18169.
运用丝网印刷的方式在导电玻璃基底表面涂覆了聚(3
4-乙烯二氧噻吩)(PEDOT):聚苯乙烯磺酸盐混合物(PSS)薄膜,并采用稀H
2
SO
4
加甲醇混合溶液后处理的方式对其进行了改性. 使用扫描电子显微镜(SEM)和原子力显微镜(AFM)观察处理前后薄膜的表面形貌及厚度的变化,对比了处理前后薄膜的电导率,并结合X射线衍射(XRD)和X射线光电子能谱(XPS)分析探讨了导致电导率变化的原因. 最后,将PEDOT:PSS薄膜作为对电极组装了染料敏化太阳能电池(DSSC),运用电化学阻抗谱(EIS)研究了对电极的催化性能,并测试了DSSC的光伏性能. 结果显示,经过后处理改性后,由于PSS被部分去除,PEDOT:PSS薄膜的表面形貌发生了显著改变,厚度变薄,粗糙度升高,电导率提升至原始的3倍以上,对I
3
–
还原的催化活性升高,且组装的DSSC的性能也有了显著提高,光电转换效率由5.12%提升至6.64%.
Poly(3
4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) films were coated on fluorine-doped tin oxide (FTO) conductive glass substrates
via
facile screen printing
followed by a modification. The modification was realized through post-treatment
i
.
e
.
immersing the as-printed films into a mixed solution consisting of diluted H
2
SO
4
and methanol
and baking at 120 °C after 10 min of dipping. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to investigate the surface morphology and the thickness changes of the films before and after treating. Electrical conductivity of the pristine and that of the treated films were calculated and compared
using sheet resistance and thickness
and the result was discussed based on X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. Finally
PEDOT:PSS films were used as counter electrodes of dye-sensitized solar cells (DSSCs). The catalytic activity of the PEDOT:PSS films toward I
3
–
reduction reaction was characterized by electrochemical impedance spectroscopy (EIS)
and the photovoltaic performance of DSSCs assembled by the films was evaluated under the irradiation of simulated AM 1.5G condition. The results demonstrate that
the amorphous PEDOT:PSS films are uniformly coated on FTO substrates after screen printing
and the surface morphology of PEDOT:PSS experiences significant change after the modification by post-treatment
with significantly decreased thickness and slightly increased roughness. The electrical conductivity has been enhanced to more than three times of that in the pristine film
due to the partial removal of PSS rather than the improvement of crystallinity. The catalytic activity toward I
3
–
reduction reaction is greatly enhanced
and the photovoltaic performance of the DSSCs assembled is also obviously improved
with the photo conversion efficiency increases from 5.12% to 6.64%. The increased PEDOT/PSS mass ratio
electrical conductivity and roughness of the PEDOT:PSS films after post-treatment is believed to be responsible for the improvedment of the photovoltaic performance of the DSSCs.
聚(34-乙烯二氧噻吩)后处理电极材料染料敏化太阳能电池
Poly(34-ethylenedioxythiophene)Post-treatmentElectrode materialDye-sensitized solar cell
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