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Production and characterization of organic solar cells

Kindness A.M. Uyanga (Department of Chemical Engineering, University of Benin, Benin City, Nigeria)
Modestus Okechukwu Okwu (Department of Mechanical Engineering, Federal University of Petroleum Resources Effurun, Effurun, Nigeria)
A.O. Adeoye (Department of Physics, Obafemi Awolowo University, Ile-Ife, Nigeria)
S.E. Ogbeide (University of Benin, Benin City, Nigeria)

World Journal of Engineering

ISSN: 1708-5284

Article publication date: 6 August 2018




The study aims to carry out the production of a bulk heterojunction organic solar cell in a laboratory scale using a blend of poly (3-hexylthiopene) (P3HT) and [6, 6]-phenyl (C61) butyric acid methyl ether (PCBM).


Four inverted geometry organic solar cells were prepared based on 1:1 ratio of P3HT to PCBM and subjected to post annealing at different temperatures of 32, 120, 130 and 140°C. Solar cells were fabricated with structure glass/ITO/P3HT:PCBM/PEDOT:PSS/Au and characterized using Keithley 2400 series sourcemeter and a multimeter interfaced to a computer system with a LabVIEW software, which showed both dark and illumination current–voltage characteristic curves. Four reference cells were also fabricated with structure soda lime glass/P3HT:PCBM and annealed at different temperatures of 32, 120, 130 and 140°C.


The third organic solar cell prepared, Sample CITO, had the best performance with power conversion efficiency (PCE) of 2.0281 per cent, fill factor (FF) of 0.392, short circuit current of −0.0133 A and open circuit voltage of 0.389 V. Annealing of active layer was found to improve cell morphology, FF and PCE. Annealing of the active layer at 140°C resulted in a decrease of the PCE to 2.01 per cent.

Research limitations/implications

These findings are in good agreement with previous investigation in literature which reported that best annealing temperature for a 1:1 ratio blend of active material is 130°C. Ultraviolet–visible spectra on reference cells showed that sample CITO had wider absorption spectra with peak absorbance at a wavelength of 508 nm.


This research is purely original.



Uyanga, K.A.M., Okwu, M.O., Adeoye, A.O. and Ogbeide, S.E. (2018), "Production and characterization of organic solar cells", World Journal of Engineering, Vol. 15 No. 4, pp. 540-548.



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