Self-assembly of polymers and small molecules for photovoltaics application
Solar energy is one of the most promising energy sources of the future with depleting amount of fossil fuels, and organic photovoltaic (OPV) is among the cheapest in terms of materials and processing methods. However, the performance of OPV is largely dependent on the morphology of the photoactive l...
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| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2010
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| Online Access: | http://hdl.handle.net/10356/36174 |
| _version_ | 1811680341997387776 |
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| author | Hong, Zijie. |
| author2 | Lam Yeng Ming |
| author_facet | Lam Yeng Ming Hong, Zijie. |
| author_sort | Hong, Zijie. |
| collection | NTU |
| description | Solar energy is one of the most promising energy sources of the future with depleting amount of fossil fuels, and organic photovoltaic (OPV) is among the cheapest in terms of materials and processing methods. However, the performance of OPV is largely dependent on the morphology of the photoactive layer. In this project, morphological control of the photoactive layer has being achieved for P3HT polymer and PTCDI-C13H27 small molecule with the addition of poor solvent. Upon introduction of poor solvent, favorable π-stacking can be induced from the changes in solubility to create one-dimensional (1-D) structure with enhanced crystallinity. Using this approach, P3HT nanofibers were constructed and devices based on this P3HT:PCBM blend obtained an increment in PCE from 0.9% to 2.3% without any post production treatment such as thermal annealing. In addition, different dimensions of PTCDI 1-D structure were also obtained using different methods of poor solvent addition. By controlling the amount of nucleation sites created and the subsequence interactions at each site, the width and length of the PTCDI 1-D structure can be controlled. The width of the PTCDI-C13H27 structures range from 20 μm to 70 nm with length ranging from 0.1 cm to 2 μm. |
| first_indexed | 2024-10-01T03:23:31Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/36174 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:23:31Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/361742023-03-04T15:38:04Z Self-assembly of polymers and small molecules for photovoltaics application Hong, Zijie. Lam Yeng Ming School of Materials Science and Engineering DRNTU::Engineering Solar energy is one of the most promising energy sources of the future with depleting amount of fossil fuels, and organic photovoltaic (OPV) is among the cheapest in terms of materials and processing methods. However, the performance of OPV is largely dependent on the morphology of the photoactive layer. In this project, morphological control of the photoactive layer has being achieved for P3HT polymer and PTCDI-C13H27 small molecule with the addition of poor solvent. Upon introduction of poor solvent, favorable π-stacking can be induced from the changes in solubility to create one-dimensional (1-D) structure with enhanced crystallinity. Using this approach, P3HT nanofibers were constructed and devices based on this P3HT:PCBM blend obtained an increment in PCE from 0.9% to 2.3% without any post production treatment such as thermal annealing. In addition, different dimensions of PTCDI 1-D structure were also obtained using different methods of poor solvent addition. By controlling the amount of nucleation sites created and the subsequence interactions at each site, the width and length of the PTCDI 1-D structure can be controlled. The width of the PTCDI-C13H27 structures range from 20 μm to 70 nm with length ranging from 0.1 cm to 2 μm. Bachelor of Engineering (Materials Engineering) 2010-04-23T03:49:27Z 2010-04-23T03:49:27Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/36174 en Nanyang Technological University 58 p. application/pdf |
| spellingShingle | DRNTU::Engineering Hong, Zijie. Self-assembly of polymers and small molecules for photovoltaics application |
| title | Self-assembly of polymers and small molecules for photovoltaics application |
| title_full | Self-assembly of polymers and small molecules for photovoltaics application |
| title_fullStr | Self-assembly of polymers and small molecules for photovoltaics application |
| title_full_unstemmed | Self-assembly of polymers and small molecules for photovoltaics application |
| title_short | Self-assembly of polymers and small molecules for photovoltaics application |
| title_sort | self assembly of polymers and small molecules for photovoltaics application |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/36174 |
| work_keys_str_mv | AT hongzijie selfassemblyofpolymersandsmallmoleculesforphotovoltaicsapplication |