Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-27T02:40:03.078Z Has data issue: false hasContentIssue false
  • English
  • Français

Experimental and Theoretical Investigation of Photosensitive ITO/PEDOT:PSS/MEH-PPV/Al Detector

Published online by Cambridge University Press:  31 January 2011

Leon Rohan Pinto ,
Jovana Petrovic ,
Petar Matavulj ,
David Keith Chambers ,
Difei Qi  and
Sandra Zivanovic Selmic
Leon Rohan Pinto
Affiliation:
[email protected], Louisiana Tech University, Institute for Micromanufacturing, Ruston, Louisiana, United States
Jovana Petrovic
Affiliation:
[email protected], University of Belgrade, Faculty of Electrical Engineering, Belgrade, Serbia
Petar Matavulj
Affiliation:
[email protected], University of Belgrade, Faculty of Electrical Engineering, Belgrade, Serbia
David Keith Chambers
Affiliation:
[email protected], Louisiana Tech University, Institute for Micromanufacturing, Ruston, Louisiana, United States
Difei Qi
Affiliation:
[email protected], Louisiana Tech University, Institute for Micromanufacturing, Ruston, Louisiana, United States
Sandra Zivanovic Selmic
Affiliation:
[email protected], Louisiana Tech University, Institute for Micromanufacturing, Ruston, Louisiana, United States
Get access

Abstract

One of widely investigated materials for photodiode, light-emitting device, and solar cell applications is a soluble conjugated polymer poly(2-methoxy-5- (2,9-ethyl-hexyloxy)-1,4-phenylene vinylene) or MEH-PPV. In this paper we present experimental results on MEH-PPV polymer and ITO/PEDOT:PSS/MEH-PPV/Al photodetector, where ITO and PEDOT:PSS stand for indium tin oxide and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), respectively. Thin polymer films were fabricated by spin-coating technique. The characterization of the material and devices are done in air at room temperature. The experimental results include optical absorption of MEH-PPV and determination of the optical absorption coefficient, photocurrent dependence on optical power, light wavelength, bias voltage, and polymer thin film thickness. Theoretical modeling is based on drift-diffusion and continuity equations for hole polarons, as well as assumption that the charge carrier recombination process is bimolecular. The bimolecular recombination mechanism implies that the photocurrent depends on the square root of the optical power, which is confirmed with our experimental results.

Keywords

polymeroptoelectronicsimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1190: Symposium NN – Active Polymers , 2009 , 1190-NN11-01
Copyright
Copyright © Materials Research Society 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Harrison, M.G., and Gruner, J., “Analysis of the photocurrent spectra of MEH-PPV polymer photodiodes”, Physical Review B, v.55, n.12, pp.7831–7849, 1997.10.1103/PhysRevB.55.7831Google Scholar
2 Gregg, B.A., and Hanna, M.C, “Comparing organic to inorganic photovoltaic cells: Theory, experiment, and simulation”, Journal of Applied Physics, vol. 93, no.6, pp. 3605–3614, 2003.10.1063/1.1544413Google Scholar
3 Lee, M.S, Kang, H.S, Kang, H.S, Joo, J, Epstein, A.J, and Lee, J.Y, ”Flexible all-polymer field effect transistors with optical transparency using electrically conducting polymers”, Thin Solid Films, vol. 477, no.1-2, pp. 169–173, 2005.10.1016/j.tsf.2004.08.128Google Scholar
4 Halls, J. J. M. and Friend, R. H., The photovoltaic effect in a PPV/perylene heterojunction, Synthetic Metals, vol.85, no.1-3, pp.1307–1308, 1996.10.1016/S0379-6779(97)80252-4Google Scholar
5 Moons, E., “Conjugated polymer blends: linking film morphology to performance of light emitting diodes and photodiodes”, Journal of Physics: Condensed Matte, vo.14, pp.12235–12260, 2002.Google Scholar
6 Lewis, A.J., Ruseckas, A., Gaudin, O.P.M., Webster, G.R., Burn, P.L, Samuel, I.D.W., “Singlet exciton diffusion in MEH:PPV films studied by exciton-exciton annihilation,” Organic Electronics, vol.7, pp. 452–456, 2006.10.1016/j.orgel.2006.05.009Google Scholar
7 Petroviæ, J., Matavulj, P., Qi, D., Chambers, D. K., and Ŝelmiæ, S., “A Model for the Current-Voltage Characteristics of ITO/PEDOT:PSS/MEHPPV/AL Photodetectors,” IEEE Photonics Technology Letters, vol.20, no.5, pp.348–350, March 2008.10.1109/LPT.2007.915586Google Scholar
8 Kraabel, B., Klimov, V.I., Kohlman, R., Xu, S., Wang, H L., McBranch, D.W., “Unified picture of the photoexcitations in phenylene-based conjugated polymers: Universal spectral and dynamical features in subpicosecond transient absorption,” Phys. Rev. B, vol. 61, pp. 8501–8515, 2000.10.1103/PhysRevB.61.8501Google Scholar
9 Arkhipov, V. I., Bassler, H., Deussen, M., Gobel, E.O., “Field-induced exciton breaking in conjugated polymers,” Phys. Rev. B, vol. 52, pp. 4932–4940, 1995.10.1103/PhysRevB.52.4932Google Scholar
10 DeVore, H. B., “Spectral Distribution of photoconductivity,” Physica Review, vol. 102, no. 1, pp. 86–91, April 1956.10.1103/PhysRev.102.86Google Scholar