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Fig. 3 | Nano Convergence

Fig. 3

From: Growth of centimeter-scale perovskite single-crystalline thin film via surface engineering

Fig. 3

Characterization of perovskite SC-TFs. a The grown MAPbBr3 SC-TF peeled off from the substrates. The thickness of the SC-TF is 10.7 ± 0.3 μm and the length is 1.15 cm, giving an aspect ratio of 1074. b X-ray diffraction spectrum of the MAPbBr3 SC-TF, which shows that the thin film is single crystal in cubic phase and the crystal orientation of the film in vertical direction is (001). c The schematic and Bragg spots for transmission X-ray microscopy measurement. d Absorption spectrum and steady-state PL spectrum of the prepared MAPbBr3 SC-TF. Insets: absorptance versus energy plot of the film, determining the optical bandgap as 2.24 eV. e PL spectra at different positions which formed the cross line on the same film (inset). The almost unchanged peak position and full width half maximum show highly uniformity of the optical property due to the uniform crystallization of the film. f The dark I-V curve used for the trap-state-density measurement

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