Laser‐Induced Localized Growth of Methylammonium Lead Halide Perovskite Nano‐ and Microcrystals on Substrates

Abstract

Laser-Induced Localized Growth of Methylammonium Lead Halide Perovskite Nano-and Microcrystals on SubstratesStable MAPbBr 3 crystals with different sizes are successfully localized on a flat substrate via laser-induced heating of the liquid precursors. By adjusting the infrared laser parameters, luminescent arrays and photoconductive wires are grown on-site. This technique can be used to guide the writing of other patterns for specific functionalities.

A one-step laser process for rapid manufacture of mesoscopic perovskite solar cells prepared under high relative humidity

“…[27] As shown in Figure 1c, the bare glass showed a peak temperature of 433C due to its low photo-thermal conversion. [18,28] For the ITO-glass, the peak temperature was boosted to 584°C due to the photon-induced excitation of the free charge carriers in ITO resulting in instantaneous local heating. [28] Adding a thin amorphous compact TiO2 film (50 nm) on ITO-glass did not increase the peak temperature.…”

“…Increasing the power density also led to an increase in recorded temperature on the TiO2 surfaces from 513 C to 595C as shown in Figure 5b. Following irradiation by the laser pulse the sample was found to remain at a temperature, T > 450C for 18.9 s and 39.5 s and T > 280C for 66.3 s and 82.9 s for the 86 W cm -2 and 107 W cm -2 pulses, respectively. Since Raman spectra showed that the organic binders were completely removed, and crystallization of the compact TiO2 films occurred for all three laser conditions as shown in Figure S4 and S5, the difference in PCEs is believed to be related to the difference in the degree of interconnections between the TiO2 nanoparticles.…”

“…[16] Lasers, as a state-of-the-art manufacturing tool, enable a local, precise, selective, flexible, non-contact, highly automated, low-cost and scalable fabrication process. [17] They have been used in a number of PSC applications, including laser-assisted growth of perovskite films, [18,19] laser-assisted deposition of NiO electrode and compact TiO2 films. [20,21] Moreover, in order to scale-up PSC modules for commercialization, laser scribing has been successfully used on isolating transparent conductive oxide (TCO) and other layers of the PSCs with minimal dead areas.…”

Simple fabrication of layered halide perovskite platelets and enhanced photoluminescence from mechanically exfoliated flakes

“…In recent years, lead halide perovskites have attracted much attention due to their exceptional electronic and optical properties and low-cost fabrication and solution processability. [1][2][3][4][5] In addition to the typically cubic, three-dimensional nanocrystals, structures with lower dimensionality such as perovskite nanosheets, nanowires, and the so-called 0D perovskites have been fabricated through simple modifications of wet chemistry fabrication protocols. [6][7][8][9] Among the low-dimensional perovskites, two-dimensional (2D) layered crystals have been the focus of several studies, given their bright emission, possible white fluorescence, and, in particular, their environmental stability.…”

Metal Halide Perovskites Functionalized by Patterning Technologies

“…This drawback was addressed by using N ‐methylformamide (NMF) to serve as the solvent and the source of MA ions. [ 94 ] The femtosecond laser with a repetition rate of 80 MHz would induce localized heat on the Si substrate to over 100 °C in seconds through multiphoton absorption. By tuning the laser scanning speed and power density, stable arrays or lines formed by MAPb X 3 microcrystals can be achieved without any other steps.…”