Graduate Student Oral Session (ACS) (English)
[OA-10]
우수논문발표상 응모자Achieving record efficiency in ambient inkjet-printed PHOLEDs through dual-SAM interface engineering and eco-friendly solvent systems
발표자Sagnik Chowdhury (Jeonbuk National University)
연구책임자강재욱 (전북대학교)
Abstract
Inkjet printing offers a scalable and material-efficient route for OLED fabrication, yet solution-processed PHOLEDs are often limited by interfacial instability and solvent incompatibility under ambient conditions. In this work, we demonstrate a high-performance, HTL-free PHOLED fully fabricated in air using eco-friendly inks. A dual self-assembled monolayer modification of the ITO anode enables efficient charge injection without conventional hole-transport layers, while an environmentally benign binary solvent system suppresses the coffee-ring effect and improves film uniformity. Combined with a newly designed heteroleptic Ir(III) emitter optimized for ink compatibility and charge transport, the devices achieve a record external quantum efficiency of 16.8% under ambient inkjet printing, establishing a new benchmark for printed PHOLEDs.