Fig. 1. Schematic overview of the current research on the photo-processing of perovskites.
Fig. 2. (
a) Optical absorption spectra (dash curves) and PL spectra (solid curves) of CsPbX
3 perovskite NCs with various halide compositions. SEM images of perovskite films produced by (
b) thermal annealing, (
c) nanosecond laser writing, and (
d) nanosecond laser writing with addition of carbon quantum dots. Scale bar, 500 nm. (
e) Optical images and PL mapping of a CsPbBr
3 perovskite array during the erasing–recovery processes excited by UV light. Scale bars: 100 μm. Figure reproduced with permission from: (a) ref.
43, Elsevier; (b–d) ref.
69, John Wiley and Sons; ref.
75, Springer Nature.
Fig. 3. (
a) Mechanism of UV light induced patterning of perovskite NCs. (
b) Patterning of various perovskite NCs. SEM images of the CsPbBr
3 microlenses (
c) and surface gratings (
d). Figure reproduced with permission from: (a, b) ref.
42, under a Creative Commons AttributionLicense 4.0; (c, d) ref.
53, John Wiley and Sons.
Fig. 4. (
a) Schematic of ultrafast laser–induced liquid nanophase separation and generation of CsPb(Br
1−xI
x)
3 perovskite NCs. (
b) PL mappings and spectra of CsPb(Br
1−xI
x)
3 perovskite NCs. Scale bar: 10 μm. (
c) PL mappings and spectra of perovskite NCs in the Cl
−-Br
−-I
− codoped glass. Figure reproduced with permission from ref.
33, American Association for the Advancement of Science.
Fig. 5. (
a) Schematic diagram of laser induced phase transition from CsPb
2Br
5 to CsPbBr
3 inside a CsPb
2Br
5 microplatelet. (
b) PL spectra of CsPbBr
3 generated by laser irradiation with various times (65 s per time). (
c) The integral PL intensity as a function of the excitation intensity. (
d) Schematic diagram of the strong cavity mode spontaneous emission of the laser-written CsPbBr
3 in the CsPb
2Br
5 microplatelet. Figure reproduced with permission from ref.
97, American Chemical Society.
Fig. 6. (
a–
d) Light induced shape evolution of CsPbBr
3 nanostructures with an increase in irradiation. (
e) Schematic of light-induced ligand removal mechanism and assembly of CsPbBr
3 nanocubes. (
f) High-angle annular dark-field scanning transmission electron microscopy image of assembled nanostructures. (
g) Cubic and (
h) spindle perovskite superlattices. Figure reproduced with permission from: ref.
102, American Chemical Society; ref.
105, John Wiley and Sons.
Fig. 7. (
a) SEM images of a CsPbBr
3 nanowire with laser-patterned nanogratings. (
b) A schematically nanowire laser with vertically emitting light from its upper face. (
c) PL image of the nanowire laser. (
d) Photodetector arrays based on laser-written perovskites. Figure reproduced with permission from: (a−c) ref.
51, American Chemical Society; ref.
70, John Wiley and Sons.
Fig. 8. (
a) Schematic illustration of micro-LED devices with laser-written perovskite NCs inside a glass. (
b) A dynamic holographic display. (
c) PL mapping of the 3D perovskite dots in glass. (
d) PL mapping of a perovskite pattern with tunable emission wavelength. Figure reproduced with permission from ref.
33, American Association for the Advancement of Science.