Two-Dimensional Crystalline Gridding Networks of Hybrid Halide Perovskite for Random Lasing

Abstract

We report fabrication of large-scale homogeneous crystallization of CH3NH3PbBr3 (MAPbBr3) in the patterned substrate by a two-dimensional (2D) grating. This achieves high-quality optotelectronic structures on local sites in the micron scales and a homogeneous thin-film device in a centimeter scale, proposing a convenient technique to overcome the challenge for producing large-area thin-film devices with high quality by spin-coating. Through matching the concentration of the MAPbBr3/DMF solutions with the periods of the patterning structures, we found an optimized size of the patterning channels for a specified solution concentration (e.g., channel width of 5 μm for a concentration of 0.14 mg/mL). Such a design is also an excellent scheme for random lasing, since the crystalline periodic networks of MAPbBr3 grids are multi-crystalline constructions, and supply strong light-scattering interfaces. Using the random lasing performance, we can also justify the crystallization qualities and reveal the responsible mechanisms. This is important for the design of large-scale optoelectronic devices based on thin-film hybrid halide perovskites.

Recent Patterning Methods for Halide Perovskite Nanoparticles

“…The research demonstrates that concentric morphologies can be effectively applied to lasers. Template-assisted patterning CsPbX 3 (X = Cl/Br, Br, Br/I) Laser [40] Template-assisted patterning MAPbBr 3 Laser [41] Template-assisted patterning MAPbI 3 Laser [42] Template-assisted patterning MAPbBr 3 Laser [43] Template-assisted patterning MAPbI 3 Laser [44] Template-assisted patterning PEA 2 PbBr 4 X-ray [34] Template-assisted patterning MAPbI 3 Solar cell [48] Template-assisted patterning MAPbI 3 Solar cell [45] Template-assisted patterning MAPbI 3 Solar cell [46] Template-assisted patterning MAPbI 3 Solar cell [47] Template Template-assisted patterning CsPbX 3 (X = Cl/Br, Br, Br/I) Fluorescent label [36] Template-assisted patterning FAPbI 3 Image sensor [54] Template-assisted patterning MAPbI 3 Image sensor [55] Template-assisted patterning CsPbBr 3 Photodetector [35] Template-assisted patterning MAPbX 3 (X = Br, I) LED, photodetector [56] Template-assisted patterning MAPbI 3 Field-effect transistor, Photodetector [57] Template-assisted patterning MAPbI 3 Terahertz device [37] Template-assisted patterning MAPbI 3 Thin film transistor [58] Template-assisted patterning CsPbBr 3 Electrochemical cell [38] Template-assisted patterning MAPbBr As mentioned earlier, the stability of perovskite patterning is limited. If the stability is low, the device is easily degraded by external conditions and the overall device characteristics (e.g., the light emission characteristics) deteriorate.…”

“…Research into the application of perovskite layers patterned via templates is actively being conducted. [39][40][41][42][43] Recent research results indicate inefficiencies when applying an unpatterned perovskite to a laser, and research has also been reported upon patterned perovskites whose characteristics change as the interval is adjusted. Therefore, further research is required to apply these findings to lasers employing patterns with optimized intervals.…”

Phase‐Locking of Random Lasers by Cascaded Ultrafast Molecular Excitation Dynamics

“…[ 25–28 ] Random lasers based on these materials were reported using strong optical scattering supported by the multicrystalline or intentionally designed micro/nanostructures. [ 29–32 ]…”

Multimode Lasing in All-Solution-Processed UV-Nanoimprinted Distributed Feedback MAPbI3 Perovskite Waveguides

“…Thus, numerous less destructive perovskite patterning methods have been suggested in the literature. Perovskite film deposition atop pre-patterned substrates , or functional layers is suitable to form the desired periodic nanostructures. In another approach, by virtue of their soft nature, perovskite films can be directly patterned by thermal nanoimprint lithography (T-NIL) , under high pressure at elevated temperatures.…”