等离子表面改性实现原位生长高分辨率钙钛矿发光二极管OA

Quasi-two-dimensional perovskites,with their excellent optoelectronic properties,high luminous effi-ciency,and solution-processable characteristics,have become ideal materials for next-generation high-resolution dis-plays.However,in high-resolution display applications,traditional patterning techniques struggle to balance high resolution,high fidelity,and the quality of perovskite films.Printing technology has limited resolution and is prone to the'coffee-ring'effect.Photolithography carries the risk of light-induced damage and involves complex process-es.Laser direct writing is costly and has low material utilization.To address this,we propose a high-resolution pat-terning strategy based on thermal nanoimprinting combined with hydrophilic-hydrophobic template-induced crystalli-zation.By using plasma surface modification to create a honeycomb polymethyl methacrylate(PMMA)film with con-trasting wettability,we leverage interfacial energy gradients to drive the selective localized growth of perovskite pre-cursor solutions in predefined hydrophilic areas,achieving perovskite microarrays with clear boundaries and uniform density.The high-resolution perovskite light-emitting diodes(PeLEDs)fabricated using this method show an emission peak at 527 nm,a maximum external quantum efficiency(EQE)of 7.24％,and a maximum brightness of 9 474 cd·m-2.This work provides a patterning approach for the fabrication of high-performance perovskite micro-displays that combines high resolution,simple processing,and excellent film quality.