P3HT/Dodecylamine Functioned Carbon Microspheres Composite Films for Polymer Solar Cells

Abstract

P3HT/dodecylamine functioned carbon microspheres (D-CMSs) composite films were prepared by spin-coating method with D-CMSs and P3HT mixture chloroform solution, and the photovoltaic devices with structures ITO/PEDOT:PASS/P3HT:D-CMSs/Al were also fabricated. Morphology and structure of the composite films were characterized by field emission scanning electron microscopy, atomic force microscopy, Fourier transformation infrared spectrometry and X-raydiffractometry. Ultraviolet-visible spectrophotometry and photoluminescence spectrometry were used to characterize the optical property of the composite films. The results show that composite films with 1:1 ratio of D-CMSs to P3HT had optimum morphology and optical performance. The absorption of annealed P3HT:D-CMSs composite films was enhanced with a red-shift, and the crystallinity of film enhanced after annealing. The polymer solar cells based on P3HT:D-CMSs composite films exhibited a high V_oc of 0.840 V, suggesting D-CMSs is a promising acceptor for polymer cells. This would lay an experimental and theoretical foundation for further researching the fabricating polymer solar cells with new acceptors.

Keywords::

• carbon microspheres
• P3HT
• composite film
• active layer
• photoelectric property

Additional information

Funding

The authors acknowledge financial support from National Natural Science Foundation of China (21176169, 51152001), International Science & Technology Cooperation Program of China (2012DFR50460), PhD Programs Foundation of Ministry of Education of China (20101402110007), Shanxi Provincial Key Innovative Research Team in Science and Technology (2012041011), Research Project Supported by Shanxi Scholarship Council of China (2012–038), and Program for Changjiang Scholar and Innovative Research Team in University (IRT0972).