Abstract
In this work, we report a light-guided strategy for the parallel patterning of electroactive PEDOT on hematite in a spatially controlled manner with high precision at the microscale. This strategy utilizes photoelectrochemical polymerization processes, spatially guided by flexible adjustments of light illumination, to achieve light-guided patterning of PEDOT with high spatial control in a parallel manner on hematite. This light-guided strategy enables well-controlled and flexible patterning of PEDOT on hematite surfaces without the need for photomasks, covering scales from millimeters to micrometers, with a spatial resolution of 1.5 ± 0.2 μm. Furthermore, the PEDOT-patterned hematite was found to be electroactive, making it suitable as an optoelectronic platform for selectively enhancing electrochemiluminescence generation on the electroactive PEDOT pattern with high efficiency, which is ∼9.3-fold higher than that on the surface of bare hematite, even at lower applied potentials. This showcased the promising potential of the light-guided patterning strategy for developing functional hybrid materials for applications such as light-emitting electronics. .