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Lead-Free and Stable Potassium Titanium Halide Perovskites: Synthesis, Characterization and Solar Cell Simulation

Author

Listed:
  • Saranya Kumar

    (Condensed Matter Research Laboratory, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India)

  • Malathi Murugesan

    (Condensed Matter Research Laboratory, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India)

Abstract

Titanium based double perovskites have shown good optical properties along with remarkable stability, making them promising lead-free perovskites for optoelectronic applications. In this work, Potassium Titanium Halide (K 2 TiBr 6, K 2 TiI 6 and K 2 TiI 2 Br 4 ) double perovskites are synthesized for the first time. Surface topology and chemical composition are studied. Photoluminescence characterization shows a peak in the UV region. The perovskites exhibit quasi bandgap with K 2 TiI 6 having 1.62 eV direct bandgap, conducive for single junction solar cell fabrication. K 2 TiBr 6 and K 2 TiI 2 Br 4 have bandgaps 2.14 eV and 2.44 eV, respectively, which is favorable for tandem solar cell application. The decomposition temperature of K 2 TiI 6 is notable at 678 °C, bestowing it with stability in ambient atmosphere. Inherent to its optical properties, Solar Cell Capacitance Simulator-1D (SCAPS-1D) is used to simulate perovskite solar cell (PSC) with K 2 TiI 6 as the absorber. Utilizing the absorption data from UV-Vis spectroscopy, these PSCs are designed to give maximum efficiency. Upon numerical optimization of perovskite layer thickness, we propose an efficient, practically realizable PSC with a power conversion efficiency of 4.382%. Besides, various electron and hole transport layers are investigated and the effect of their thickness on the PSC performance are studied.

Suggested Citation

  • Saranya Kumar & Malathi Murugesan, 2022. "Lead-Free and Stable Potassium Titanium Halide Perovskites: Synthesis, Characterization and Solar Cell Simulation," Energies, MDPI, vol. 15(19), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:6963-:d:922662
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    References listed on IDEAS

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    1. Yongjin Gan & Xueguang Bi & Yucheng Liu & Binyi Qin & Qingliu Li & Qubo Jiang & Pei Mo, 2020. "Numerical Investigation Energy Conversion Performance of Tin-Based Perovskite Solar Cells Using Cell Capacitance Simulator," Energies, MDPI, vol. 13(22), pages 1-17, November.
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