Molecular Engineering of Polymeric Hole Transport Materials for Next-Generation QLEDs

Quantum dot light-emitting diodes (QLEDs) have emerged as promising candidates for next-generation display and lighting technologies owing to their outstanding color purity, tunable wavelength, and solution-process compatibility. Despite remarkable advances in quantum dot emitters, the development of efficient and robust hole transport materials (HTMs) remain a critical challenge for achieving high-performance and operationally stable QLEDs. In particular, polymeric hole transport layers (HTLs) rquire a delicate balance of charge transport capability, energy level alignment, morphological stability, and solvent resistance during mulitilayer solution processing.
In this presentation, I introduce recent progress in the molcular engineering of polymeric HTMs for next-generation QLEDs. Particular emphasis will be placed on the rational design of conjugated polymer backbones, side-chain engineering, cross-linkable functionalities, and interfacial properties to simultaneously enhance charge injection, transport efficiency, and device stability. These molecular strategies significantly improve the optoelectronic properties and structural robustness of the HTLs, leading to enhanced luminance, current efficiency, external quantum efficiency, and operational lifetime in solution-processed QLEDs. Finally, the presentatin will highlight future perspectives and design principles for polymeric HTMs toward highly efficient, stable, and scalable next-generation QLED technologies.