Rapid and high-resolution patterning of microstructure and composition in organic semiconductors using 'molecular gates'.

Nature Communications
Aleksandr Perevedentsev, Mariano Campoy-Quiles

Abstract

Photolithography has been a major enabling tool for miniaturisation of silicon devices that underpinned the electronics revolution. Rapid, high-resolution patterning of key material characteristics would, similarly, accelerate the advent of molecular electronics and photonics. Here we advance a versatile approach employing local diffusion of functional small-molecular compounds through a solution-processed 'molecular gate' interlayer. Diffusion is activated using laser light or solvent vapour jets-a process that can be finely modulated down to molecule-on-demand deposition precision with almost photolithographic resolution (<5 μm) and speeds (3 mm s-1). Examples of principal pattern types are presented including molecular conformation for integrated photonics; chain orientation for polarised security features and micro-engineered electronics; and doping with local conductivity values >3 S cm-1 for improved electronic devices. Finally, we demonstrate the unique capability for one-step patterning of multiple functionalities by spatially modulating composition in ternary blends, leading to locally tunable photoluminescence from blue to red.

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Citations

Sep 22, 2020·ACS Energy Letters·Osnat Zapata-ArteagaMariano Campoy-Quiles
Nov 19, 2021·Chemical Reviews·Alberto D ScaccabarozziThomas D Anthopoulos

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Methods Mentioned

BETA
Raman
atomic force microscopy
AFM
biosensing

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