CHANGES IN THERMALLY STIMULATED CONDUCTIVITY OF CsPbBr3 AND CsPbCl3 CRYSTALS EXPOSED TO X-RAY IRRADIATION

Bohdan Pavlyk, Roman Lys, Roman Gamernyk, Mykola Goydalo

Abstract


Introduction. CsPbBr3 and CsPbCl3 crystals remain among the most intensively studied materials. This is due to their high efficiency in solar cells, which currently exceeds 22%. However, an unsolved problem is the degradation of these perovskites under the influence of external factors.

Materials and Methods. This study investigates monocrystals of perovskites CsPbBr3 and CsPbCl3 subjected to X-ray irradiation. The experiment aims to establish the dose-dependent patterns of changes in the electrical characteristics of the crystals. Research under these conditions is relevant due to the high photosensitivity of the materials in the UV, X-ray, and γ-ray spectra, making them promising for the fabrication of photodetectors in the detection of ionizing radiation.

Results and Discussion. It has been found that changes in the activation energies of electrical conductivity may result from alterations in the conduction mechanism due to the formation of perovskite phase transitions in CsPbBr3 crystals. A decrease in activation energies of conductivity in the high-temperature range (160–180 °C) was observed, attributed to the effect of X-rays. A trend towards decreasing activation energies of conductivity with increasing dose of irradiation was identified. In the low-temperature range (30–90 °C), CsPbBr3 crystals exhibited sharp changes in current through the samples, significantly decreasing in the range of (95–140) °C, followed by an increase in current at higher temperatures. It is suggested that these results may be attributed to radiation-stimulated generation of vacancy-type defects (VBr) in CsPbBr3 crystals. The formation of similar phase structures in CsPbCl3 crystals occurs at significantly lower temperatures and much lower corresponding thermoelectric currents, necessitating further detailed investigations for their analysis. The generation of radiation defects in CsPbCl3 crystals becomes significant at doses ≥ 130 Gy.

Conclusions. The study establishes that the influence of X-ray irradiation and the subsequent passage of current through CsPbBr3 crystals is accompanied by the formation of two perovskite phases, CsPb2Br5 and Cs4PbBr6. The formation of the corresponding phase structures in CsPbCl3 crystals occurs at much lower temperatures and much smaller values of the corresponding thermal currents, therefore, additional, more detailed studies are required for their analysis.

Keywords: X-ray irradiation, radiation defects, perovskites, conduction activation energy.


References


  1. Jinsong Huang, Yongbo Yuan, Yuchuan Shao, Yanfa Yan. (2017). Understanding the physical properties of hybrid perovskites for photovoltaic applications. Nature Reviews Materials, 2(7), 17042 (1–19). https://doi.org/10,1038/natrevmats.2017.42
  2. Pankaj P. Khirade, Anil V. Raut. (2022) Perovskite Structured Materials: Synthesis, Structure, Physical Properties and Applications. Recent Advances in Multifunctional Perovskite Materials, (1–31). https://doi.org/10,5772/intechopen.106252
  3. Gnanasampanthan Abiram, Murugathas Thanihaichelvan, Punniamoorthy Ravirajan, Dhayalan Velauthapillai. (2022). Review on Perovskite Semiconductor Field–Effect Transistors and Their Applications. Nanomaterials, 12(14), 2396 (1–33). https://doi.org/10,3390/nano12142396
  4. Reshmi Varma, P.C. (2018). Low-Dimensional Perovskite. Perovskite Photovoltaics. Chapter 7 – Low-Dimensional Perovskites, 197–229. https://doi.org/10,1016/B978-0-12-812915-9.00007-1
  5. Dirin, D.N., Cherniukh, I., Yakunin, S.,Shynkarenko, Y., Kovalenko, M.V. (2016). Solution-Grown CsPbBr3 Perovskite Single Crystals for Photon Detection. Chemistry of Materials, 28, 8470–8474. https://doi.org/10,1021/acs.chemmater.6b04298
  6. Kayun, I., Lys, R., Tymkiv, Y. (2023). Modeling of ion transfer processes in CsPbBr3 crystals. Proceedings of the 2023 IEEE 13th International conference on electronics and information technologies (ELIT 2023), 340–343. https://doi.org/10,1109/ELIT61488.2023.10311009
  7. Zhendong Guo, Man Yuan, Gaoyuan Chen, Feng Liu, Ruifeng Lu, Wan-Jian Yin. (2024). Understanding Defects in Perovskite Solar Cells through Computation: Current Knowledge and Future Challenge. Advanced Science, 11(20), 2305799(1–13). https://doi.org/10,1002/advs.202305799
  8. Aurélien M.A. Leguy, Yinghong Hu, Mariano Campoy-Quiles, M. Isabel Alonso, Oliver J. Weber, Pooya Azarhoosh, Mark van Schilfgaarde, Mark T. Weller, Thomas Bein, Jenny Nelson, Pablo Docampo, Piers R. F. Barnes (2015). Reversible Hydration of CH3NH3PbI3 in Films, Single Crystals, and Solar Cells. Chemistry of Materials, 27(9), 3397–3407. https://doi.org/10,1021/acs.chemmater.5b00660
  9. Namyoung Ahn, Kwisung Kwak, Min Seok Jang, Heetae Yoon, Byung Yang Lee, Jong-Kwon Lee, Peter V. Pikhitsa, Junseop Byun, Mansoo Choi. (2016). Trapped charge-driven degradation of perovskite solar cells. Nature Communications, 7(13422), 1–9. https://doi.org/10,1038/ncomms13422
  10. Nicholas Aristidou, Christopher Eames, Irene Sanchez-Molina, Xiangnan Bu, Jan Kosco, M. Saiful Islam, Saif A. Haque. (2017). Fast oxygen diffusion and iodide defects mediate oxygen-induced degradation of perovskite solar cells. Nature Communications, 8(15218), 1–10, https://doi.org/10,1038/ncomms15218
  11. Wei Hui, Lingfeng Chao, Hui Lu, Fei Xia, Qi Wei, Zhenhuang Su, Tingting Niu, Lei Tao, Bin Du, Deli Li, Yue Wang, He Dong, Shouwei Zuo, Bixin Li, Wei Shi, Xueqin Ran, Ping Li, Hui Zhang, Zhongbin Wu, Chenxin Ran, Lin Song, Guichuan Xing, Xingyu Gao, Jing Zhang, Yingdong Xia, Yonghua Chen and Wei Huang. (2021). Stabilizing black-phase formamidinium perovskite formation at room temperature and high humidity. Science, 371(6536), 1359-1364. https://doi.org/10,1126/science.abf7652
  12. Shaun Tan, Ilhan Yavuz, Marc H. Weber, Tianyi Huang, Chung-Hao Chen, Rui Wang, Hao-Cheng Wang, Jeong Hoon Ko, Selbi Nuryyeva, Jingjing Xue, Yepin Zhao, Kung-Hwa Wei, Jin-Wook Lee, Yang Yang. (2020). Shallow Iodine Defects Accelerate the Degradation of α-Phase Formamidinium Perovskite. Joule, 4(11), 2426–2442. https://doi.org/10,1016/j.joule.2020,08.016
  13. Yong Wang, Yuetian Chen, Taiyang Zhang, Xingtao Wang, Yixin Zhao. (2020). Chemically Stable Black Phase CsPbI3 Inorganic Perovskites for High-Efficiency Photovoltaics. Advanced Materials, 32(45), 2001025. https://doi.org/10,1002/adma.202001025
  14. Dane W. de Quilettes, Sarah M. Vorpahl, Samuel D. Stranks, Hirokazu Nagaoka, Giles E. Eperon, Mark E. Ziffer, Henry J. Snaith and David S. Ginger. (2015). Solar cells. Impact of microstructure on local carrier lifetime in perovskite solar cells. Science, 348(6235), 683-6. https://doi.org/10,1126/science.aaa5333
  15. Jie Xing, Qi Wang, Qingfeng Dong, Yongbo Yuan, Yanjun Fang and Jinsong Huang. (2016). Ultrafast ion migration in hybrid perovskite polycrystalline thin films under light and suppression in single crystals. Physical Chemistry Chemical Physics, 18, 30484–30490, https://doi.org/10,1039/C6CP06496E
  16. Turedi, B., Lee, K.J., Dursun, I., Alamer, B., Wu, Z., Alarousu, E., Mohammed, O.F., Cho, N., Bakr, O.M. (2018). Water-Induced Dimensionality Reduction in Metal-Halide Perovskites. The Journal of Physical Chemistry C., 122, 14128–14134. https://doi.org/10,1021/acs.jpcc.8b01343
  17. Zhang, Z., Zhu, Y., Wang, W., Zheng, W., Lin, R., Li, X., Zhang, H., Zhong, D., Huang, F. (2018). Aqueous Solution Growth of Millimeter-Sized Nongreen-Luminescent Wide Bandgap Cs4PbBr6 Bulk Crystal. Crystal Growth &amp, 11, 6393–6398. https://doi.org/10,1021/acs.cgd.8b00817
  18. Bruzzi, M., Latino, M, Falsini, N., Calisi, N., Vinattieri, A. (2022). Electrical and Optical Characterization of CsPbCl3 Films around the High-Temperature Phase Transitions. Nanomaterials, 12(3), 570(1–17). https://doi.org/10,3390/nano12030570




DOI: http://dx.doi.org/10.30970/eli.29.13

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