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Title: Drying temperature effects on electrical and optical properties of poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) thin film

Abstract

Temperature effects on electrical and optical properties of a representative semiconducting polymer, poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV), has recently attracted much attention. The MEH-PPV thin films were deposited at different drying temperature (anneal temperature) using spin-coating technique. The spin coating technique was used to produce uniform film onto large area. The MEH-PPV was dissolved in toluene solution to exhibits different optical and electrical properties. The absorption coefficient and bandgap was measured using UV-Visible-NIR (UV-VIS-NIR). The bandgap of MEH-PPV was effect by the thickness of thin films. For electrical properties, two-point probe was used to characterize the current-voltage measurement. The current-voltage measurement shows that the MEH-PPV thin films become more conductive at high temperature. This study will provide better performance and suitable for optoelectronic device especially OLEDs applications.

Authors:
; ; ;  [1]; ;  [2];  [1];  [3]
  1. NANO-ElecTronic Centre, Faculty of Electrical Engineering, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor (Malaysia)
  2. Research Chair of Targeting and Treatment of Cancer Using Nanoparticles Department of Biochemistry, College of Science, King Saud University (KSU), 245 Riyadh 11454 (Saudi Arabia)
  3. (UiTM), Shah Alam, Selangor (Malaysia)
Publication Date:
OSTI Identifier:
22608599
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1733; Journal Issue: 1; Conference: IC-NET 2015: International conference on nano-electronic technology devices and materials 2015, Selangor (Malaysia), 27 Feb - 2 Mar 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; DRYING; ELECTRIC POTENTIAL; ELECTRICAL PROPERTIES; LIGHT EMITTING DIODES; OPTICAL PROPERTIES; OPTOELECTRONIC DEVICES; POLYMERS; SPIN; SPIN-ON COATING; TEMPERATURE DEPENDENCE; THICKNESS; THIN FILMS; TOLUENE

Citation Formats

Azhar, N. E. A., E-mail: najwaezira@yahoo.com, Affendi, I. H. H., E-mail: irmahidayanti.halim@gmail.com, Shafura, A. K., E-mail: shafura@ymail.com, Shariffudin, S. S., E-mail: sobihana@gmail.com, Alrokayan, Salman A. H., E-mail: dr.salman@alrokayan.com, Khan, Haseeb A., E-mail: khan-haseeb@yahoo.com, Rusop, M., E-mail: rusop@salam.uitm.edu.my, and NANO-SciTech Centre, Institute of Science, Universiti Teknologi MARA. Drying temperature effects on electrical and optical properties of poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) thin film. United States: N. p., 2016. Web. doi:10.1063/1.4948861.
Azhar, N. E. A., E-mail: najwaezira@yahoo.com, Affendi, I. H. H., E-mail: irmahidayanti.halim@gmail.com, Shafura, A. K., E-mail: shafura@ymail.com, Shariffudin, S. S., E-mail: sobihana@gmail.com, Alrokayan, Salman A. H., E-mail: dr.salman@alrokayan.com, Khan, Haseeb A., E-mail: khan-haseeb@yahoo.com, Rusop, M., E-mail: rusop@salam.uitm.edu.my, & NANO-SciTech Centre, Institute of Science, Universiti Teknologi MARA. Drying temperature effects on electrical and optical properties of poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) thin film. United States. doi:10.1063/1.4948861.
Azhar, N. E. A., E-mail: najwaezira@yahoo.com, Affendi, I. H. H., E-mail: irmahidayanti.halim@gmail.com, Shafura, A. K., E-mail: shafura@ymail.com, Shariffudin, S. S., E-mail: sobihana@gmail.com, Alrokayan, Salman A. H., E-mail: dr.salman@alrokayan.com, Khan, Haseeb A., E-mail: khan-haseeb@yahoo.com, Rusop, M., E-mail: rusop@salam.uitm.edu.my, and NANO-SciTech Centre, Institute of Science, Universiti Teknologi MARA. Wed . "Drying temperature effects on electrical and optical properties of poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) thin film". United States. doi:10.1063/1.4948861.
@article{osti_22608599,
title = {Drying temperature effects on electrical and optical properties of poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) thin film},
author = {Azhar, N. E. A., E-mail: najwaezira@yahoo.com and Affendi, I. H. H., E-mail: irmahidayanti.halim@gmail.com and Shafura, A. K., E-mail: shafura@ymail.com and Shariffudin, S. S., E-mail: sobihana@gmail.com and Alrokayan, Salman A. H., E-mail: dr.salman@alrokayan.com and Khan, Haseeb A., E-mail: khan-haseeb@yahoo.com and Rusop, M., E-mail: rusop@salam.uitm.edu.my and NANO-SciTech Centre, Institute of Science, Universiti Teknologi MARA},
abstractNote = {Temperature effects on electrical and optical properties of a representative semiconducting polymer, poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV), has recently attracted much attention. The MEH-PPV thin films were deposited at different drying temperature (anneal temperature) using spin-coating technique. The spin coating technique was used to produce uniform film onto large area. The MEH-PPV was dissolved in toluene solution to exhibits different optical and electrical properties. The absorption coefficient and bandgap was measured using UV-Visible-NIR (UV-VIS-NIR). The bandgap of MEH-PPV was effect by the thickness of thin films. For electrical properties, two-point probe was used to characterize the current-voltage measurement. The current-voltage measurement shows that the MEH-PPV thin films become more conductive at high temperature. This study will provide better performance and suitable for optoelectronic device especially OLEDs applications.},
doi = {10.1063/1.4948861},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1733,
place = {United States},
year = {Wed Jul 06 00:00:00 EDT 2016},
month = {Wed Jul 06 00:00:00 EDT 2016}
}
  • In this paper we investigate the causes of the chromatic alteration observed in chloroform solutions of poly (2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) after gamma ray irradiation. Structural and chemical changes were analyzed by gel permeation chromatography, fourier transform infrared spectroscopy, and proton nuclear magnetic resonance techniques and complemented by electronic structure calculations. The results indicate chlorine incorporation in the polymer structure and main chain scission after irradiation. Based on our findings we propose that the main mechanism for the blue-shifts, observed in the UV-Vis absorption spectra of MEH-PPV after irradiation, is the result of a radical attack on the polymer main chain.more » Gamma rays generate radicals, Cl and CHCl{sub 2} from chloroform radiolysis that attack preferentially the vinyl double bonds of the polymer backbone, breaking the electronic conjugation and eventually the chain. Our results indicate that oxygen does not play a major role in the effect. Electronic spectra simulations were performed based on these assumptions reproducing the UV-Vis experimental results.« less
  • We present a quantitative analysis of the absorption and field-induced absorption (electroabsorption) spectra of dilute blends of the conjugated polymer poly[2-methoxy,5-(2{prime}-ethyl-hexoxy)-{ital p}-phenylene vinylene] (MEH-PPV) oriented in ultrahigh-molecular-weight polyethylene (PE). Because of the orientation, the enhanced order and the dilution of the MEH-PPV conjugated polymer in the polyethylene matrix, the MEH-PPV/PE blend is an ideal system in which to investigate the intrinsic linear and nonlinear optical properties of oriented conjugated polymer chains; the absorption is directly proportional to the imaginary part of {chi}{sup (1)}({omega}) and the electroabsorption is directly proportional to the imaginary part of {chi}{sup (3)}({omega},0,0) of the oriented, orderedmore » MEH-PPV {pi}-electron system. The optical data obtained from the oriented blends are, therefore, directly relevant to theoretical models which describe the intrinsic electronic structure of the conjugated polymer, i.e., models which do not account for disorder. Using a model based on the continuum version of the Su-Schrieffer-Heeger theory, we simultaneously fit to the absorption and electroabsorption spectra, and demonstrate that the intrinsic optical line shape of MEH-PPV oriented in polyethylene is highly asymmetric, and can be modeled accurately in terms of a Gaussian-broadened one-dimensional square-root singularity in the joint density of states.« less
  • We report results on optimisation of the third order nonlinear optical properties of PPV films obtained by the precursor route. There is a strong dependence of the modulus of the nonlinear refractive index n{sub 2} measured by degenerate four-wave mixing using 125 fs pulses at 800 nm on the spectral characteristics: e.g. the position and shape of the absorption maximum, and the values of absorption coefficients as well as refractive indices of TE and TM modes of PPV films measured at 633 nm and 810 nm. Films were prepared from the precursor polymer: poly(xylilidene tetrahydrothiophenium chloride) synthesised using different combinationsmore » of the solvent and base during the polymerization. Precursor films were thermally converted into the conjugated polymer under identical conditions. We observed an enhancement of the nonlinearity by about an order of magnitude with the shift of the absorption maximum from 380 to 450 mn and a marked increase of the absorption coefficients. The enhancement was interpreted as related to the different capability of the precursor to achieve longer conjugation due to different concentration of chemical and physical defects present in the precursor polymer prepared under various conditions.« less
  • Recent investigations of the promising materials for optoelectronic have been demonstrated by introducing n-type inorganic material into conjugated polymer. The optical and electrical of nanocomposite films based on poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) and zinc oxide (ZnO) nanostructured of various deposition layers (1 to 3 layers) have been investigated. The MEH-PPV: ZnO nanocomposite films were deposited using spin-coating technique. The surface morphology nanocomposite films were characterized using field emission scanning electron microscope. From surface profiler measurement, we found that the thickness of nanocomposite films increased as deposition time increased. The optical properties were measured using photoluminescence spectroscope. The photoluminescence (PL) spectra showedmore » that two deposition layers is the highest intensity at visible region (green emission) due to high energy transfer from particles to the polymer. The current density for two layers sample is due to aggregation of conjugated polymer chain hence form excited interchain exciton for optical excitation. This study will provide better performance and suitable for optoelectronic device especially OLEDs application.« less
  • Thin films of poly [2-methoxy-5(2'-ethyl hexyloxy)-phenylene vinylene](MEH-PPV) containing different weight percent of ZnO nanoparticles were deposited by spin coating from THF solutions and their optical properties were investigated. Optical characterization of the nanocomposite thin films were performed by Ultraviolet-Visible Spectrophotometer (UV-Vis) and Photoluminescence Spectrometer while the thickness of the thin films was measured by using Surface Profiler. The UV-Vis absorption spectra of MEH-PPV: ZnO films showed a small red shift as compared with pure MEH-PPV. Similarly, a small red shift was found in PL emission spectra with increasing the content of ZnO nanoparticles.