High-Quality Patterning of CsPbBr₃ Perovskite Films through Lamination-Assisted Femtosecond Laser Ablation toward Light-Emitting Diodes

Abstract

Metal halide perovskites have exhibited promising potential for practical applications such as image sensors and displays benefiting from their outstanding optoelectronic properties. However, owing to the instability of the perovskite materials, producing patterned perovskite films with adequately high quality and high precision for such practical applications poses a challenge for existing patterning methods. Herein, the lamination-assisted femtosecond laser ablation (LA-FsLA) technique was successfully applied to fabricate patterned CsPbBr3 films with sufficiently high quality and high precision. A sandwich-laminated structure (glass/CsPbBr3/glass) was introduced to avoid the impact of debris on the patterned perovskite film. As a result, arbitrarily patterned perovskite films with high quality, submicron precision, and well-defined edges were successfully prepared. Moreover, the light-emitting diodes (LEDs) based on the patterned perovskite films also exhibit good emission characteristics. This work provides a promising strategy for the fabrication of patterned perovskite films with adequately high quality and high precision toward perovskite-based optoelectronic devices.

Fabrication of two-dimensional hybrid organic–inorganic lead halide perovskites with controlled multilayer structures by liquid-phase laser ablation

“…The perovskite films precisely patterned with submicron scale have been fabricated by use of femtosecond laser pulses. 21,22 The successful fabrication of 3D hybrid perovskite nanostructures by LPLA served as an inspiration, and therefore, the synthesis of 2D perovskites with controlled stacking structures was proposed. By applying LPLA, 2D-layered structures can be constructed from 2D sheets of PbX 6 octahedra created by laser ablation of the 3D perovskite target in the presence of additive amines.…”

“…The perovskite films precisely patterned with submicron scale have been fabricated by use of femtosecond laser pulses. 21,22…”

Femtosecond Laser-Processed Perovskite Thin Films with Reduced Nonradiative Recombination and Improved Photodetecting Performance

“…Xing et al applied fs laser to induce micro-/nanostructures on the surface of perovskite single crystals to improve their photoluminescence (PL) . Liang et al achieved high-quality patterning of perovskite films for LED through fs laser ablation . Arciniegas et al grew locally perovskite nano- and microcrystals induced by fs laser .…”

“…21 Liang et al achieved high-quality patterning of perovskite films for LED through fs laser ablation. 17 Arciniegas et al grew locally perovskite nanoand microcrystals induced by fs laser. 22 Very recently, Sun et al reported three-dimensional (3D) direct lithography of stable perovskite nanocrystals in glass with ultrafast laser-induced liquid nanophase separation.…”

High-Resolution In Situ Crystallization and Patterning of a CsPbBr3 Film via Femtosecond Laser Printing

“…All-inorganic metal halide perovskites have been widely investigated owing to their excellent characteristics, such as tunable band gaps, high carrier mobilities, and solution processability. − These remarkable features promote the development of perovskite-based optoelectronic devices such as lasers, light-emitting diodes (LEDs), and photodetectors rapidly, making individual optoelectronic units based on perovskites outstanding candidates for practical applications. , However, from a practical application point of view, the fabrication of optoelectronic device arrays is crucial, such as integrated photodetector arrays for image sensing and LED arrays for displays . Therefore, high-resolution patterning of perovskite films is particularly of significance .…”