Li, H.; Wang, J.; Li, H.; Guo, Z.; Chen, Z. Passivation of Defective States in Single Crystal MAPbBr3 and Their Optoelectronic Properties Study. Journal of Luminescence 2024, 120497, doi:10.1016/j.jlumin.2024.120497.
Li, H.; Wang, J.; Li, H.; Guo, Z.; Chen, Z. Passivation of Defective States in Single Crystal MAPbBr3 and Their Optoelectronic Properties Study. Journal of Luminescence 2024, 120497, doi:10.1016/j.jlumin.2024.120497.
Li, H.; Wang, J.; Li, H.; Guo, Z.; Chen, Z. Passivation of Defective States in Single Crystal MAPbBr3 and Their Optoelectronic Properties Study. Journal of Luminescence 2024, 120497, doi:10.1016/j.jlumin.2024.120497.
Li, H.; Wang, J.; Li, H.; Guo, Z.; Chen, Z. Passivation of Defective States in Single Crystal MAPbBr3 and Their Optoelectronic Properties Study. Journal of Luminescence 2024, 120497, doi:10.1016/j.jlumin.2024.120497.
Abstract
We fabricated high-quality MAPbBr3 single crystals (SC) by introducing moderate amount electron-rich poly(propylene glycol bis(2-aminopropyl ether) (PEA) additives with an inverse temperature crystallization (ITC) method. The intramolecular vibrations and defective states of prepared MAPbBr3 single crystals were systemically studied by the in situ variable-temperature Fourier Transform Infrared (FTIR) Spectroscopy, X-ray photoelectron spectroscopy (XPS), and the synchrotron-based X-ray absorption near edge structure (XANES), et al. We infer that the proper amount of PEA additives would prevent the formation of intermediate states and crystal boundaries, passivating the density of defective states. The X-ray detection properties of single-crystal MAPbBr3 crystals were investigated, using both high dose and low dose X-ray photons at 40keV in synchrotron beamlines. The photocurrent of optimized PEA-treated MAPbBr3 single crystals demonstrate better performance compared with the as-prepared single crystals. Meanwhile, the decay time of MAPbBr3 single crystal is decreased from 460 ns to 210 ns by Time-resolved photoluminescence (TRPL) decay measurement, owing to the defect passivation by 0.5wt% PEA additives. The PEA-treated single crystals possess much faster decay time than the commercialized Ce:YAG scintillator (>500ns). These results help elucidate the passivation of defective states and contribute paths to manufacture high-quality single crystal perovskites for next-generation optoelectronic devices.
Keywords
single crystal; perovskite; synchrotron; MAPbBr3; optical property
Subject
Physical Sciences, Applied Physics
Copyright:
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