Junze Li, Junchao Hu, Jiaqi Ma, Xinglin Wen, Dehui Li, "Identifying self-trapped excitons in 2D perovskites by Raman spectroscopy [Invited]," Chin. Opt. Lett. 19, 103001 (2021)
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- Chinese Optics Letters
- Vol. 19, Issue 10, 103001 (2021)
Fig. 1. (a) Schematic of crystal structure. (b) Optical microscope image of the as-synthesized crystal. Scale bar: 2 mm. (c) Powder XRD pattern of as-synthesized crystals. (d) Optical microscope image of an exfoliated flake. Scale bar: 10 µm.
Fig. 2. PL spectra of a crystal under different excitation at 80 K.
Fig. 3. PL spectra of a crystal excited by (a) 2.33 eV and (b) 1.96 eV lasers at different temperatures.
Fig. 4. Raman spectra of a crystal under 2.33 eV (black) and 1.96 eV (red) laser excitation at 80 K. The positions of all peaks are , , (non-excited state), and , , , (excited state).
Fig. 5. Temperature-dependent Raman spectra of a crystal under non-excited states excited by (a) 1.96 eV and (b) 2.33 eV lasers, respectively.
Fig. 6. Raman peak versus temperature extracted from Fig. 5 . The gray dot lines are used to guide the eye.
Fig. 7. Raman spectra of under 2.33 eV (black) and 1.96 eV (red) laser excitation at 80 K.
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