Digital Laser Micropainting for Reprogrammable Optoelectronic Applications

Abstract

Structural coloration is closely related to the progress of innovative optoelectronic applications, but the absence of direct, on‐demand, and rewritable coloration schemes has impeded advances in the relevant area, particularly including the development of customized, reprogrammable optoelectronic devices. To overcome these limitations, a digital laser micropainting technique, based on controlled thin‐film interference, is proposed through direct growth of the absorbing metal oxide layer on a metallic reflector in the solution environment via a laser. A continuous‐wave laser simultaneously performs two functions—a photothermal reaction for site‐selective metal oxide layer growth and in situ real‐time monitoring of its thickness—while the reflection spectrum is tuned in a broad visible spectrum according to the laser fluence. The scalability and controllability of the proposed scheme is verified by laser‐printed painting, while altering the thickness via supplementary irradiation of the identical laser in the homogeneous and heterogeneous solutions facilitates the modification of the original coloration. Finally, the proof‐of‐concept bolometer device verifies that specific wavelength‐dependent photoresponsivity can be assigned, erased, and reassigned by the successive application of the proposed digital laser micropainting technique, which substantiates its potential to offer a new route for reprogrammable optoelectronic applications.

Laser Processing of Flexible In-Plane Micro-supercapacitors: Progresses in Advanced Manufacturing of Nanostructured Electrodes

“…Facing these issues that need to be addressed, many attempts to directly grow NWs in specific places that combine growth, harvesting and placement processing have emerged. Among the proposed techniques, laser-induced hydrothermal growth (LIHG) technique shows great potential for flexible in-plane MSCs because of the growth of TMO NWs/NPs by photochemical or photo-thermochemical reaction only at specific places without multiple steps. ,− Additionally, the technique has characteristics of low cost, low temperature, ambient pressure, and environment friendliness. In addition, the length of the formed TMO NWs is longer than that formed by traditional growth in a single point without precursor solution refreshment.…”

“…In 2013, Yeo et al utilized a CW green Nd:YAG laser as a local heat source to grow ZnO NWs at a desired position without any mask or prepatterned seed layer (Figure A). Subsequently, this group further investigated the effect of laser absorption layer design on the laser-induced temperature field and subsequent local growth characteristics of various TMO NW arrays at desired directions by controlling the laser beam, such as ZnO, ,, TiO 2 , WO 3 , and Fe 2 O 3 . , Regardless of the laser power, irradiation time or absorption layer, the growth mechanism of TMO NWs is basically the same. Take the growth mechanism of TiO 2 NWs as an example, as shown in Figure B.…”

Laser Erasing and Rewriting of Flexible Copper Circuits

“…Reversible laser processing of nanostructured materials is expected to be an alternative solution to this proposition because it integrates the construction and reconstruction processes, which has recently attracted considerable interest in information storage, dynamic coloration, and reprogrammable functional resistance manufacturing [18][19][20][21][22]. The basic principle of these techniques is based on the interconversion of nanostructured metals and oxides, which can be controlled by varying the process parameters such as atmosphere, laser parameters, laser type, and precursor composition [19][20][21][22]. However, manufacturing highly conductive components with these methods is rarely reported, probably because these reversible structures' conductivity is not satisfactory.…”

Eco‐Friendly and Particle‐Free Copper Ionic Aqueous Precursor for In Situ Low Temperature Photothermal Synthesizing and Patterning of Highly Conductive Copper Microstructures on Flexible Substrate

“…Flexible electronics have gained significant attention over the past few decades due to their wide range of application in many different kinds of device including wearable sensors, [ 1 ] field‐effect transistors, [ 2 ] flexible displays, [ 3 ] soft actuators, [ 4 ] wearable energy harvesting devices, [ 5 ] and implantable medical devices and e‐skins. [ 6 ] Demand for flexible electronics keeps growing and is expected to become a market with a scale of billions of dollars by 2027.…”