Autors: Pandiev, I. M., Aleksandrova, M. P., Kurtev, N. A.
Title: Design of a Low-Input-Voltage Self-Oscillating DC-DC Boost Converter Intended to Process the Electrical Energy from Tandem Solar Cells
Keywords: energy harvesting, perovskites, step-up oscillators, tandem solar cells, transformers

Abstract: In this paper, the structure and operational principle of an electronic system intended to process the electrical energy from small tandem solar cells was presented. For the fabricated solar cells the GaAs:Te is a bottom cell and mechanical substrate, while the perovskite layer acts as the top cell to capture high-energy photons. To convert the electrical energy produced by the created tandem solar cells, an electronic system of a low-power DC-DC converter, providing a stabilized output voltage was synthesized. To increase the efficiency at low levels of photo-voltage (below 0.5 V generated by a single solar cell in a solar panel with no less than three cells (under load)), a self-oscillating voltage step-up DC-DC converter based on a so-called "Joule thief"circuit was synthesized as an input stage in the proposed electronic system. Moreover, to store harvested electrical energy, a low-power supercapacitor was included in the output network, and in case of insufficient energy from the solar cells, a circuit with a backup battery was also connected. As a result of the performed verification check, the values for the main electrical parameters were obtained in reasonable agreement with the results of the calculations, using the proposed analytical expressions.

References

  1. Y. Olzhabay, I. H. Idu, I. A. Ukaegbu and A. Ng, "State-of-the-Art Electronic Engineering of Emerging PVs for Indoor IoT Applications," in IEEE Access, vol. 13, pp. 184954-184977, 2025.
  2. J. C. Hertel, J. E. F. Overgaard, I. H. H. Jørgensen, T. M. Andersen, M. Rødgaard and A. Knott, "Synchronous Rectifier for High-Frequency Switch-Mode Power Supplies Using Phase-Locked Loops," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 8, no. 3, pp. 2227-2237, Sept. 2020.
  3. A. Chakraborty, G. Lucarelli, J. Xu, Z. Skafi, S. Castro-Hermosa, A.B. Kaveramma, R. G. Balakrishna, Th. M. Brown, "Photovoltaics for indoor energy harvesting," in Nano Energy, vol. 128, part B, 2024.
  4. E. Moon, I. Lee, D. Blaauw, and J. D. Phillips, "High-efficiency photovoltaic modules on a chip for millimeter-scale energy harvesting," Prog. Photovolt., Res. Appl., vol. 27, no. 6, pp. 540–546, Jun. 2019.
  5. P. Wu, et al., "A Roadmap for Efficient and Stable All-Perovskite Tandem Solar Cells from a Chemistry Perspective," ACS Central Science, vol. 9, no. 1, 14-26, 2023.
  6. J. M. Damaschke, "Design of a low-input-voltage converter for thermoelectric generator," in IEEE Transactions on Industry Applications, vol. 33, no. 5, pp. 1203-1207, Sept.-Oct. 1997.
  7. E. Macrelli, A. Romani, R. P. Paganelli, A. Camarda and M. Tartagni, "Design of Low-Voltage Integrated Step-up Oscillators with Microtransformers for Energy Harvesting Applications," in IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 62, no. 7, pp. 1747-1756, July 2015.
  8. D. Grgic, T. Ungan, M. Kostic, and L. M. Reindl, “Ultra-low input voltage DC-DC converter for micro energy harvesting,” in Proc. PowerMEMS, 2009, pp. 265–268.
  9. Analog Devices Ultralow Voltage Step-Up Converter and Power Manager-LTC3108. Accessed on Nov. 2025. [Online]. Available: https://www.analog.com/en/products/ltc3108.html
  10. A. Camarda, M. Tartagni and A. Romani, "A −8 mV/+15 mV Double Polarity Piezoelectric Transformer-Based Step-Up Oscillator for Energy Harvesting Applications," in IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 65, no. 4, pp. 1454-1467, April 2018.
  11. S. -E. Adami, V. Marian, N. Degrenne, C. Vollaire, B. Allard and F. Costa, "Self-powered ultra-low power DC-DC converter for RF energy harvesting," 2012 IEEE Faible Tension Faible Consommation, Paris, France, 2012, pp. 1-4.
  12. Z. Kaparnik and W. Swindon, ‘‘One volt LED—A bright light,’’ Everyday Practical Electron. (EPE) Mag., p. 804, Nov. 1999.
  13. T. Voglhuber-Brunnmaier and B. Jakoby, "Understanding Relaxation Oscillator Circuits Using Fast-Slow System Representations," in IEEE Access, vol. 11, pp. 99452-99469, 2023.
  14. J. Wang, et al., "An Exploration of All-Inorganic Perovskite/Gallium Arsenide Tandem Solar Cells. " Sol. RRL, vol. 5, 2021.

Issue

Proceedings of the International Spring Seminar on Electronics Technology, pp. 6, 2026, Bulgaria, https://doi.org/10.1109/ISSE70010.2026.11600940

Вид: публикация в международен форум, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus