Rapid and high-resolution patterning of microstructure and composition in organic semiconductors using ‘molecular gates’

Aleksandr Perevedentsev () and Mariano Campoy-Quiles ()
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Aleksandr Perevedentsev: Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
Mariano Campoy-Quiles: Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)

Nature Communications, 2020, vol. 11, issue 1, 1-12

Abstract: 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 ( 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.

Date: 2020
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DOI: 10.1038/s41467-020-17361-8

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