Matter and Radiation at Extremes, Volume. 5, Issue 1, 018201(2020)
Pressure responses of halide perovskites with various compositions, dimensionalities, and morphologies
Fig. 1. (a) Schematic diagram of perovskite structure. This figure is reproduced with permission from Yin
Fig. 2. (a) Schematic diagram of the sample in a DAC. (b) High-pressure synchrotron-based setup for diffraction. (c)
Fig. 3. The research progress of HPVs under high pressure. Reproduced with permission from Wu
Fig. 4. (a) Summary of pressure-induced structural evolution in MAPb/SnX3. (b) Pressure-induced bandgap evolution of MAPbI3. (c) Pressure dependence of average carrier lifetimes of single crystal and polycrystalline MAPbI3; inset shows normalized results. (b) and (c) Reproduced with permission from Kong
Fig. 5. (a) Electrical resistance as a function of pressure for MAPbBr3. The inset in panel (a) shows microphotographs of the samples with four Au probes in two DACs. This figure is reproduced with permission from Wang
Fig. 6. (a) WAXS patterns of CsPbBr3 nanocubes during compression and decompression. (b)–(d) Integrated WAXS spectra with calculated Bragg reflection positions at 1.4 GPa, 14.5 GPa, and total release of pressure, respectively. The bars represent the calculated Bragg reflection positions. (e) TEM image of the pressure-sintered NPLs. Inset shows the high-resolution (HR) TEM image of the pressurized sample with a lamellar structure before disassembly. (f) An HRTEM image and the corresponding FFT pattern (inset) of the pressure-synthesized CsPbBr3 NPLs. (g) Schematic demonstration of the pressure-sintering process: NC-SL evolution (top) and interparticle fusion (bottom). (h) Plots of the PL peak position of the NC-SL PLs (black) and the relative PL intensity (gray) as a function of pressure. The open square shows the PL intensity after decompression. These figures are reproduced with permission from Nagaoka
Fig. 7. (a) and (b)
Fig. 8. (a) Pressure-dependent PL spectra of 1D C4N2H14SnBr4. (b) PL images of C4N2H14SnBr4 under different pressures. (c) Pressure-dependent chromaticity coordinates. (d) and (e) Crystal structures and Br–Sn–Br bond length and angle of C4N2H14SnBr4 before and after the structural transition. (f) Calculation of the absorption oscillator strengths using the excited-state structure associated with STEs at 0.17 and 8.01 GPa. These figures are reproduced with permission from Shi
Fig. 9. (a) and (b) UV-Vis absorption spectra of Cs2AgBiBr6 under high pressure. (c) Pressure-induced bandgap evolution of Cs2AgBiBr6, and representative optical micrographs. (d) Angle-dispersive synchrotron XRD patterns of Cs2AgBiBr6 at selected pressures. (e) and (f) Rietveld refinements of angle-dispersive synchrotron XRD patterns recorded at 0.6 and 4.5 GPa, respectively. These figures are reproduced with permission from Li
Fig. 10. High-pressure XRD patterns of (a) Cs2SnBr6 and (b) Cs2SnI6. (c) Two different crystal structures of Cs2SnI6, where the ambient pressure
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Mei Li, Tianbiao Liu, Yonggang Wang, Wenge Yang, Xujie Lü. Pressure responses of halide perovskites with various compositions, dimensionalities, and morphologies[J]. Matter and Radiation at Extremes, 2020, 5(1): 018201
Category: High Pressure Physics and Materials Science
Received: Oct. 24, 2019
Accepted: Dec. 6, 2019
Published Online: Feb. 18, 2020
The Author Email: Lü Xujie (xujie.lu@hpstar.ac.cn)