Mechanism for dimethylformamide-treatment of poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) layer to enhance short circuit current of polymer solar cells

作者：Gong Cheng; Yang Hong Bin; Song Qun Liang; Lu Zhi Song; Li Chang Ming^*

来源：Solar Energy Materials and Solar Cells, 2012, 100: 115-119.

DOI：10.1016/j.solmat.2011.12.006

• Polymer solar cell
• DMF
• Organic solvent
• PEDOT: PSS
• P3HT: PCBM

Dimethylformamide (DMF), an organic solvent, was used to treat the poly(3, 4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT: PSS) layer in poly(3-hexylthiophene) (P3HT): [6,6]-phenyl C61-butyric acid methyl ester (PCBM) polymer solar cells, resulting in significant enhancement of photocurrent and power conversion efficiency (PCE) improvement by 70%. Analyses of I-V characteristics reveal that the change in the active layer rather than that of the PEDOT: PSS buffer layer is ascribed to performance improvement. AFM images indicate that the roughness of PEDOT: PSS layer has been increased after the treatment. We argue that the protrudent PEDOT: PSS could serve as the centers for an initial crystallization of P3HT chains leading to a better alignment of P3HT: PCBM domains for a greatly enhanced photocurrent.

• 出版日期2012-5
• 单位西南大学; 南阳理工学院