Thin-film CdTe/CdS/ZnO solar cells and the path to affordable clean energy: Simulation-based evidence for sustainable photovoltaic design
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Global decarbonization commitments have intensified demand for low-cost, scalable solar technologies, yet the gap between laboratory-scale device physics and real-world deployment economics remains poorly addressed in simulation-oriented research. This study examines the photovoltaic performance of a CdTe/CdS/ZnO thin-film solar cell using one-dimensional numerical simulation in SCAPS-1D, focusing on two parameters with direct implications for manufacturing costs and field performance: absorber layer thickness (0.05–2 µm) and operating temperature (300–400 K). Under standard test conditions (AM1.5G, 1000 W/m², 300 K), the baseline device achieves an open-circuit voltage of 0.9482 V, a short-circuit current density of 10.43 mA/cm², a fill factor of 76.79%, and a power conversion efficiency of 7.60%. Increasing absorber thickness progressively raises both current density and open-circuit voltage through enhanced photon capture and reduced bulk recombination, while the fill factor declines owing to greater series resistance. Rising temperature degrades open-circuit voltage, fill factor, and overall efficiency - from 7.6% at 300 K to 5.7% at 400 K - primarily through an exponential increase in reverse saturation current, whereas short-circuit current density remains largely insensitive to thermal variation. At an absorber thickness of approximately 1.5–2 µm, efficiency approaches 21%, a threshold relevant to the commercial viability of CdTe modules. These findings carry concrete implications for sustainable energy deployment: reducing CdTe absorber thickness without sacrificing efficiency directly lowers material consumption and cadmium usage, easing both environmental and supply-chain concerns. The results provide simulation-based guidance for designing cost-competitive thin-film modules capable of supporting the SDG 7 (Affordable and Clean Energy) and SDG 13 (Climate Action) objectives, particularly in climate-stressed regions where thermal degradation is a persistent operational challenge.
Sustainable Development Goals (SDGs): SDG 7: Affordable and Clean Energy; SDG 13: Climate Action
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This work is licensed under a Creative Commons Attribution 4.0 International License.
This work (article) is licensed under a Creative Commons Attribution 4.0 International License.
References
Ahmmed, S., Aktar, A., Rahman, Md. F., Hossain, J., & Ismail, A. B. Md. (2020). A numerical simulation of high efficiency CdS/CdTe based solar cell using NiO HTL and ZnO TCO. Optik, 223, 165625. https://doi.org/10.1016/j.ijleo.2020.165625 DOI: https://doi.org/10.1016/j.ijleo.2020.165625
Ali, A. M., Rahman, K. S., Ali, L. M., Akhtaruzzaman, M., Sopian, K., Radiman, S., & Amin, N. (2017). A computational study on the energy bandgap engineering in performance enhancement of CdTe thin film solar cells. Results in Physics, 7, 1066–1072. https://doi.org/10.1016/j.rinp.2017.02.032 DOI: https://doi.org/10.1016/j.rinp.2017.02.032
Bhari, B. Z., Rahman, K. S., Chelvanathan, P., & Ibrahim, M. A. (2023). Numerical Simulation of Ultrathin CdTe Solar Cell by SCAPS-1D. IOP Conference Series: Materials Science and Engineering, 1278(1), 012002. https://doi.org/10.1088/1757-899X/1278/1/012002 DOI: https://doi.org/10.1088/1757-899X/1278/1/012002
Buonomenna, M. G. (2023). Inorganic Thin-Film Solar Cells: Challenges at the Terawatt-Scale. Symmetry, 15(9), 1718. https://doi.org/10.3390/sym15091718 DOI: https://doi.org/10.3390/sym15091718
Farah Khaleda, M. Z., Vengadaesvaran, B., & Rahim, N. A. (2021). Spectral response and quantum efficiency evaluation of solar cells: A review. In Energy Materials (pp. 525–566). Elsevier. https://doi.org/10.1016/B978-0-12-823710-6.00014-5 DOI: https://doi.org/10.1016/B978-0-12-823710-6.00014-5
Heriche, H., Rouabah, Z., & Bouarissa, N. (2017). New ultra thin CIGS structure solar cells using SCAPS simulation program. International Journal of Hydrogen Energy, 42(15), 9524–9532. https://doi.org/10.1016/j.ijhydene.2017.02.099 DOI: https://doi.org/10.1016/j.ijhydene.2017.02.099
IEA. (2024). World Energy Outlook 2024. International Energy Agency. https://www.iea.org/reports/world-energy-outlook-2024
Jin, M.-J., Chen, X.-Y., Gao, Z.-M., Ling, T., & Du, X.-W. (2012). Improve photo-electron conversion efficiency of ZnO/CdS coaxial nanorods by p-type CdTe coating. Nanotechnology, 23(48), 485401. https://doi.org/10.1088/0957-4484/23/48/485401 DOI: https://doi.org/10.1088/0957-4484/23/48/485401
Kartopu, G., Turkay, D., Ozcan, C., Hadibrata, W., Aurang, P., Yerci, S., Unalan, H. E., Barrioz, V., Qu, Y., Bowen, L., Gürlek, A. K., Maiello, P., Turan, R., & Irvine, S. J. C. (2018). Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays. Solar Energy Materials and Solar Cells, 176, 100–108. https://doi.org/10.1016/j.solmat.2017.11.036 DOI: https://doi.org/10.1016/j.solmat.2017.11.036
Maalouf, A., Okoroafor, T., Jehl, Z., Babu, V., & Resalati, S. (2023). A comprehensive review on life cycle assessment of commercial and emerging thin-film solar cell systems. Renewable and Sustainable Energy Reviews, 186, 113652. https://doi.org/10.1016/j.rser.2023.113652 DOI: https://doi.org/10.1016/j.rser.2023.113652
Mekky, A. H. (2025). A Comprehensive Simulation Study of CdTe Energy Gap Effects on CdTe/CdS Solar Cell Characteristics: SCAPS-1D. Periodica Polytechnica Chemical Engineering. https://doi.org/10.3311/PPch.38728 DOI: https://doi.org/10.3311/PPch.38728
Meng, X., Tang, T., Zhang, R., Liu, K., Li, W., Yang, L., Song, Y., Ma, X., Cheng, Z., & Wu, J. (2022). Optimization of germanium-based perovskite solar cells by SCAPS simulation. Optical Materials, 128, 112427. https://doi.org/10.1016/j.optmat.2022.112427 DOI: https://doi.org/10.1016/j.optmat.2022.112427
NREL. (2025). Levelized cost of energy calculator. National Renewable Energy Laboratory. https://www.nrel.gov/analysis/tech-lcoe.html
Oman, D. M., Dugan, K. M., Killian, J. L., Ceekala, V., Ferekides, C. S., & Morel, D. L. (1999). Device performance characterization and junction mechanisms in CdTe/CdS solar cells. Solar Energy Materials and Solar Cells, 58(4), 361–373. https://doi.org/10.1016/S0927-0248(99)00008-2 DOI: https://doi.org/10.1016/S0927-0248(99)00008-2
Parashar, D., Krishna, V. S. G., Moger, S. N., Keshav, R., & Mahesha, M. G. (2020). Thickness Optimization of ZnO/CdS/CdTe Solar Cell by Numerical Simulation. Transactions on Electrical and Electronic Materials, 21(6), 587–593. https://doi.org/10.1007/s42341-020-00209-9 DOI: https://doi.org/10.1007/s42341-020-00209-9
Paudel, N. R., Wieland, K. A., & Compaan, A. D. (2012). Ultrathin CdS/CdTe solar cells by sputtering. Solar Energy Materials and Solar Cells, 105, 109–112. https://doi.org/10.1016/j.solmat.2012.05.035 DOI: https://doi.org/10.1016/j.solmat.2012.05.035
Peña, J. L., Arés, O., Rejón, V., Rios-Flores, A., Camacho, J. M., Romeo, N., & Bosio, A. (2011). A detailed study of the series resistance effect on CdS/CdTe solar cells with Cu/Mo back contact. Thin Solid Films, 520(2), 680–683. https://doi.org/10.1016/j.tsf.2011.04.193 DOI: https://doi.org/10.1016/j.tsf.2011.04.193
Peter Amalathas, A., & Alkaisi, M. (2019). Nanostructures for Light Trapping in Thin Film Solar Cells. Micromachines, 10(9), 619. https://doi.org/10.3390/mi10090619 DOI: https://doi.org/10.3390/mi10090619
Scarpulla, M. A., McCandless, B., Phillips, A. B., Yan, Y., Heben, M. J., Wolden, C., Xiong, G., Metzger, W. K., Mao, D., Krasikov, D., Sankin, I., Grover, S., Munshi, A., Sampath, W., Sites, J. R., Bothwell, A., Albin, D., Reese, M. O., Romeo, A., … Hayes, S. M. (2023). CdTe-based thin film photovoltaics: Recent advances, current challenges and future prospects. Solar Energy Materials and Solar Cells, 255, 112289. https://doi.org/10.1016/j.solmat.2023.112289 DOI: https://doi.org/10.1016/j.solmat.2023.112289
Simya, O. K., Mahaboobbatcha, A., & Balachander, K. (2015). A comparative study on the performance of Kesterite based thin film solar cells using SCAPS simulation program. Superlattices and Microstructures, 82, 248–261. https://doi.org/10.1016/j.spmi.2015.02.020 DOI: https://doi.org/10.1016/j.spmi.2015.02.020
Sivaraj, S., Rathanasamy, R., Kaliyannan, G. V., Panchal, H., Jawad Alrubaie, A., Musa Jaber, M., Said, Z., & Memon, S. (2022). A Comprehensive Review on Current Performance, Challenges and Progress in Thin-Film Solar Cells. Energies, 15(22), 8688. https://doi.org/10.3390/en15228688 DOI: https://doi.org/10.3390/en15228688
Vicente, A. T., Wojcik, P. J., Mendes, M. J., Águas, H., Fortunato, E., & Martins, R. (2017). A statistics modeling approach for the optimization of thin film photovoltaic devices. Solar Energy, 144, 232–243. https://doi.org/10.1016/j.solener.2017.01.029 DOI: https://doi.org/10.1016/j.solener.2017.01.029
Williams, B. L., Major, J. D., Bowen, L., Phillips, L., Zoppi, G., Forbes, I., & Durose, K. (2014). Challenges and prospects for developing CdS/CdTe substrate solar cells on Mo foils. Solar Energy Materials and Solar Cells, 124, 31–38. https://doi.org/10.1016/j.solmat.2014.01.017 DOI: https://doi.org/10.1016/j.solmat.2014.01.017
Zyoud, S. H., Zyoud, A. H., Ahmed, N. M., & Abdelkader, A. F. I. (2021). Numerical Modelling Analysis for Carrier Concentration Level Optimization of CdTe Heterojunction Thin Film–Based Solar Cell with Different Non–Toxic Metal Chalcogenide Buffer Layers Replacements: Using SCAPS–1D Software. Crystals, 11(12), 1454. https://doi.org/10.3390/cryst11121454 DOI: https://doi.org/10.3390/cryst11121454