Laser-induced microstructuring of two-dimensional layered inorganic–organic perovskites

Abstract

Non-contact bi-directional micropatterning of two-dimensional (2D) layered inorganic-organic (IO) perovskite [(R-NH3)2PbI4, R = organic moiety] thin films by direct laser writing (DLW) has been reported. These 2D materials are in the form of natural multiple quantum well (MQW) structures and show excitonic luminescence at room temperature because of quantum and dielectric confinement effects. Systematic optical and structural analyses of these laser processed hybrid systems provide an insight into laser-matter interaction and a pathway to develop technology to define complex 2D material based devices with new functionalities. These laser-matter interaction studies reveal several concurrent processes: single photon absorption, material ablation, melting and agglomeration of nanostructures and chemical/physical modifications. This study also provides an insight into chemical and optical changes in laser processed 2D perovskites which subsequently can be recovered by chemical processing. Apart from controllable feature sizes, the prolonged laser exposure results in material agglomeration in the form of nano-pillars at the laser track boundaries. Low-cost micro/nano-scaffolding of IO perovskites may have several important advantages in scalable optoelectronic devices, the realisation of luminescent photonic architectures (photonic crystals and waveguides), and light harvesting elements for IO LEDs and solar cells.

Silicon‐Based Inorganic–Organic Hybrid Nanocomposites for Optoelectronic Applications

“…All PbO‐deposited samples (on bare silicon and/or PS) were converted into CHPI by direct intercalation of 2‐(1‐cyclohexenyl) ethylammonium iodide (C 6 H 9 C 2 H 4 NH 3 I, CHI,) into PbO, where a rapid iodination occurred inside the organic moiety, converting the nanocomposite into the desired CHPI. The intercalation methodology was described elsewhere . X‐ray diffraction patterns were obtained from Philips X'Pert Pro (wavelength Cu K α ; 1.54060 Å) diffractometer.…”

“…Thei ntercalation methodology was described elsewhere. [19,20] Xray diffraction patterns were obtained from Philips XPert Pro (wavelength Cu K a ;1 .54060 )d iffractometer. Optical reflection spectra were obtained using ah omebuilt optical setup consisting of aw hite-light source,afiber-optic spectrometer,a nd bifurcated multimode fiber (Ocean Optics products).…”

“…Typically, the fabrication of an IO hybrid thin film is from chemical synthesis, which is followed by spin coating. The direct deposition and intercalation of organic moiety into layered host were also recently established . Recently, growth of 3D perovskite nanorods within an IR‐transparent nanoporous silicon template prepared using chemical vapor deposition (CVD) was reported .…”

“…Thed irect depositiona nd intercalationo fo rganic moiety into layered host were also recently established. [17][18][19][20] Recently,g rowtho f3 Dp erovskite nanorodsw ithin an IRtransparent nanoporous silicon templatep repared using chemical vapor deposition( CVD) was reported. [21] However, for complete space filling, growth, and nucleation on the nanoscale,e lectrochemical deposition is more suitable and very few reportsa re available because of fabrication issues.…”

High‐Purity Hybrid Organolead Halide Perovskite Nanoparticles Obtained by Pulsed‐Laser Irradiation in Liquid

“…[2,29,35] An excesso fs urfactants and alkylammonium halide is typically required to increaset he solubility of the intermediate metal-halide species. In recent years, PLIL has been successfully exploited to obtain metal, [41][42][43][44][45][46][47] oxide, [48][49][50] semiconductor, [51][52][53][54][55] and hybrid [56][57][58] nanostructures with high purity and controlled size, even at high pressure. [8,29,36] As demonstrated in recent studies, this synthetic approachs ometimes produces am ixture of HyP nanoparticles and nanoplatelets.…”