Effects of alkyl chains on the self-assembly of poly(3-alkylthiophenes) for solar cells applications
Conducting polymers poly-3-butyl-thiophene, poly-3-pentyl-thiophene, poly-3-heptyl-thiophene poly-3-octyl-thiophene have been made into one dimensional nanofibers by the whiskers methods and used as donors in bulk heterojunction solar cell applications. The parameters in the whiskers method: cooling...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2010
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| Online Access: | http://hdl.handle.net/10356/40071 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Conducting polymers poly-3-butyl-thiophene, poly-3-pentyl-thiophene, poly-3-heptyl-thiophene poly-3-octyl-thiophene have been made into one dimensional nanofibers by the whiskers methods and used as donors in bulk heterojunction solar cell applications. The parameters in the whiskers method: cooling rate, concentration of starting solution and aging time were varied. The morphology and absorbance were characterized using Atomic force microscope and Ultra-Violet Visible spectroscopy respectively. A time study of each of the poly-3-alkyl-thiophene was also carried out to determine the amount of nanofiber growth over time. The UV-Vis The photo conversion efficiency was tested and annealed poly-3-butyl-thiophene shows the best performance. A device consisting of a donor ratio of (1:1) P3BT and P3OT was also fabricated and annealed. This sample showed better performance over just poly-3-butyl-thiophene or poly-3-octtyl-thiophene. |
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