Fabrication of conducting polymer-based light emitting diodes
Conducting polymers as active layers for LEDs, solar cells, and sensors among others have advantages over their inorganic counterpart due to ease and cost of fabrication, light weight, and flexibility. In this study, the emissive layer of polymer-based light emitting diodes (PLEDs) was fabricated by...
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| Main Authors: | , |
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| Format: | text |
| Language: | English |
| Published: |
Animo Repository
2017
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| Subjects: | |
| Online Access: | https://animorepository.dlsu.edu.ph/etd_bachelors/8304 |
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| Institution: | De La Salle University |
| Language: | English |
| Summary: | Conducting polymers as active layers for LEDs, solar cells, and sensors among others have advantages over their inorganic counterpart due to ease and cost of fabrication, light weight, and flexibility. In this study, the emissive layer of polymer-based light emitting diodes (PLEDs) was fabricated by several methods: spin coating, solution casting, and drop coating. Polyethylene terephthalate (PET) from used water bottles was recycled using the dissolution - precipitation technique. Dimethyl sulfoxide (DMSO) was used as the solvent, and iodine was used as a dopant. The doped solution was deposited on indium-tin-oxide (ITO)-coated glass substrate using either spin coating or solution casting technique. The PLEDs reported in this study were fabricated by depositing poly[2-methoxy-5-(2- ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) onto an ITO-coated glass substrate by either spin coating or drop coating. Chlorobenzene was used as solvent and the coated substrates were annealed for 5 minutes at 60‚°C. The cathode layer used was either aluminum (Al) or gold (Au). The fabricated PLEDs were only able to emit light for a short time which might be due to the oxidation of the MEH-PPV layer. The UV-Vis spectra and the SEM micrographs of the MEH-PPV layer on ITO were determined. |
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