Solvent Effects on the Electrical and Optical Properties of Nanocomposited MEH-PPV:TiO₂ Films for Organic Solar Cells Application

Abstract:

The influence of organic solvent on the electrical and optical behavior of poly [2-methoxy-5-(2-ethylhexyloxy-p-phenylene-vinylene)] (MEH-PPV): Titanium Dioxide (TiO₂) active layer has been investigated. The performance of the nanocomposite thin films varied depending on different type of solvent (chloroform, tetrahydrofuran (THF), toluene, xylene and 1,3-Dicholorobenzene) to dissolve MEH-PPPV at concentration of 20 mg/20ml. The solvent used to dissolve MEH-PPV has a dramatic effect on the polymer properties and characteristics due to different chain interaction, crystalline structure formation and surface morphology. The electrical properties of nanocomposited MEH-PPV: TiO₂ thin films were measured by solar simulator in dark and under AM 1.5, 100 mW/cm² white light illumination condition while the characterization of optical properties has been done using UV-VIS spectrophotometer to evaluate the absorbance as well as the transmittance. By comparing the nanocomposite thin films with the same weight MEH-PPV: TiO₂, it was found the thin film which used 1,3-Dicholorobenze as a solvent has the highest conductivity around 338.64x10³ S.m^-1. However for the optical properties, solvent of xylene gives the highest absorption coefficient at 8.4x10⁶ m^-1. The dispersion of nanocomposited MEH-PPV:TiO₂ and film formation reproducibility, these solvents showed that its affected film resistance and dispersion stability in the thin films.

• Periodical: Advanced Materials Research (Volume 364)
• Pages: 86-89
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.364.86
• Online since: October 2011
• Authors: Fazlinashatul Suhaidah Binti Zahid, Puteri Sarah Binti Muhamad Saad, Mohamad Rusop
• Keywords: Absorption Coefficient, Conducting Polymer, Conductivity, Solvent Effects, TiO₂

References

[1] W.H. Baek, H. Yang, T.S. Yoon, C.J. Kang, H.H. Lee, and Y.S. Kim: Solar Energy Materials and Solar Cells, vol. 93 (2009), pp.1263-1267.

DOI: 10.1016/j.solmat.2009.01.019

[2] Y. Li and et al.: Chinese Physics Letters, vol. 24 (2007), p.2654.

[3] W. Ma, C. Yang, X. Gong, K. Lee, and A.J. Heeger: Advanced Functional Materials vol. 15 (2005), pp.1617-1622.

[4] F. Padinger, R.S. Rittberger, and N.S. Sariciftci: Advanced Functional Materials, vol. 13 (2003), pp.85-88.

[5] D.C. Olson, J. Piris, R.T. Collins, S.E. Shaheen, and D.S. Ginley: Thin Solid Films vol. 496 (2006), pp.26-29.

DOI: 10.1016/j.tsf.2005.08.179

[6] Jie Liu, Yijian Shi, and Y. Yang: Advanced Functional Materials vol. 11 (2001).

[7] Y. Shi, J. Liu, and Y. Yang: Journal of Applied Physics vol. 87 (2000).

[8] A. Petrella, M. Tamborra, P.D. Cozzoli, M.L. Curri, M. Striccoli, P. Cosma, G.M. Farinola, F. Babudri, F. Naso, and A. Agostiano: Thin Solid Films vol. 64 (2004), pp.451-452.

DOI: 10.1016/j.tsf.2003.10.106

[9] S.H. Yang, P.L. Rendu, T.P. Nguyen, and C.S. Hsu: Review Advanced Material Science vol. 15 (2007), pp.144-149.