Boosting the photovoltaic performance of CdS/P3HT solar cells by Mn inclusion

Year 2026, Volume: 7 Issue: 1, 15 - 20, 30.01.2026

Salih Yılmaz , Murat Tomakin , Emin Bacaksız

https://doi.org/10.55696/ejset.1841966

Abstract

This study highlights the enhancement in efficiency for CdS:Mn-based hybrid photovoltaic cells. Morphological analysis demonstrated that the inclusion of Mn resulted in a reduction in the grain size of CdS films. Notably, while solar cells using pure CdS and CdS:Mn (1%) films showed individual P3HT coverage on the grains, the device with 2% Mn-doping achieved a uniform surface coating. Mn incorporation significantly increased the transparency of the devices, especially in the near-infrared region, leading to a corresponding decrease in their absorbance. Photoluminescence (PL) measurements demonstrated that the P3HT layer largely dominated the emission spectra across all devices. However, Mn-doped CdS-based cells exhibited lower PL peak intensity than the reference device, suggesting more efficient exciton dissociation at the CdS:Mn/P3HT interface of the devices. Electrical characterization further confirmed that Mn-doping improved the conversion efficiency (ƞ), with the highest ƞ of 0.019% observed for the ITO/CdS:Mn (2%)/N719/P3HT device.

Keywords

Mn-doped CdS films , Photoluminescence , Hybrid solar cell , Conversion efficiency

References

• A. V. Keskin, M. Gençten, S. Bozar, M. B. Arvas, S. Güneş and Y. Şahin, “Preparation of anatase form of TiO2 thin film at room temperature by electrochemical method as an alternative electron transport layer for inverted type organic solar cells,” Thin Solid Films, vol. 706, pp. 138093, 2020. https://doi.org/10.1016/j.tsf.2020.138093.
• S. A. Yuksel, S. Gunes and H. Y. Guney, “Hybrid solar cells using CdS thin films deposited via spray pyrolysis technique,” Thin Solid Films, vol. 540, pp. 242-246, 2013. https://doi.org/10.1016/j.tsf.2013.05.126.
• S. Yılmaz, A. Ünverdi, M. Tomakin, İ. Polat and E. Bacaksız, “Surface modification of CBD-grown CdS thin films for hybrid solar cell applications,” Optik, vol. 185, pp. 256-263, 2019. https://doi.org/10.1016/j.ijleo.2019.03.156.
• S. Yılmaz, V. Doğan, M. Tomakin, S. B. Töreli, İ. Polat and E. Bacaksız, “Introduction of Co atoms into CdS thin films for improving photovoltaic properties,” Materials Today Communications, vol. 39, pp. 108805, 2024. https://doi.org/10.1016/j.mtcomm.2024.108805.
• M. Wright and A. Uddin, “Organic—inorganic hybrid solar cells: A comparative review,” Solar Energy Materials and Solar Cells, vol. 107, pp. 87-111, 2012. https://doi.org/10.1016/j.solmat.2012.07.006.
• V. Doğan, S. Yılmaz, M. Tomakin, S. B. Töreli, İ. Polat and E. Bacaksız, “Improving photovoltaic characteristics of CdS-based hybrid solar cells through Mn incorporation,” Journal of Photochemistry and Photobiology A: Chemistry, vol. 453, pp. 115678, 2024. https://doi.org/10.1016/j.jphotochem.2024.115678.
• T. Li, X. Zou and H. Zhou, “Effect of Mn Doping on Properties of CdS Quantum Dot-Sensitized Solar Cells,” International Journal of Photoenergy, pp. 569763, 2014. https://doi.org/10.1155/2014/569763.
• U. Jabeen, T. Adhikari, D. Pathak, S. M. Shah and J. M. Nunzi, “Structural, optical and photovoltaic properties of P3HT and Mn-doped CdS quantum dots based bulk heterojunction hybrid layers,” Optical Materials, vol. 78, pp. 132-141, 2018. https://doi.org/10.1016/j.optmat.2018.02.019.
• S. Aksu, E. Bacaksız, M. Parlak, S. Yılmaz, İ. Polat, M. Altunbaş, M. Türksoy, R. Topkaya and K. Özdoğan, “Structural, optical and magnetic properties of Mn diffusion-doped CdS thin films prepared by vacuum evaporation,” Materials Chemistry and Physics, vol. 130, pp. 340-345, 2011. https://doi.org/10.1016/j.matchemphys.2011.06.046.
• M. Girish, R. Sivakumar and C. Sanjeeviraja, “Tuning the properties of Cd1-xMnxS films deposited by nebulized spray pyrolysis,” Optik, vol. 227, pp. 166088, 2021. https://doi.org/10.1016/j.ijleo.2020.166088.
• T. Shen, J. Tian, L. Lv, C. Fei, Y. Wang, T. Pullerits and G. Cao, “Investigation of the role of Mn dopant in CdS quantum dot sensitized solar cell,” Electrochimica Acta, vol. 191, pp. 62-69, 2016. https://doi.org/10.1016/j.electacta.2016.01.056.
• S. Yılmaz, M. Tomakin, E. Bacaksız, “A strategy for enhancing the performance of CdS-based hybrid photovoltaic cells via Co addition,” Adana Alparslan Türkeş Science and Technology University Journal of Science, vol. 1(1) pp. 1-8, 2025.