Title

Fabrication of conducting polymer-based light emitting diodes

Date of Publication

2017

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Physics with Specialization in Materials Science

College

College of Science

Department/Unit

Physics

Thesis Adviser

Maria Carla F. Manzano

Defense Panel Member

Gil Nonato Santos

Romeric Pobre

Ofelia Rempillo

Abstract/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.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU17291

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

iii, 36 leaves : illustrations (some color) ; 28 cm. + 1 computer disc ; 4 3/4 in.

Keywords

Materials science; Diodes; LED lighting; Polyethylene terephthalate; Dimethyl sulfoxide; Chlorobenzene

This document is currently not available here.

Share

COinS