Regulation on Dual Interfaces of QD with ETL and HTL by Guanidine-Based Ligands Enable High-Performance Blue Quantum Dot Light-Emitting Diodes with 24.3% External Quantum Efficiency.

ABSTRACT: The poor efficiency and stability of blue quantum dot light-emitting diodes (QLED) hinder its practical applications in full-color displays. Insufficient hole injection and excessive surface defects in quantum dots (QD) layer remain the primary challenges limiting the performance of blue devices. Herein, a dual interface modification strategy is proposed to enhance the performance of blue QLED by synergistically regulating both the electronic transport layer (ETL)/QD and hole transport layer (HTL) HTL/QD interfaces. At the HTL/QD interface, the introduction of guanidine sulfamate (GAS) ligands passivates QD surface defects while reducing the hole injection barrier, thereby improving hole injection efficiency in the low-bias region. Meanwhile, at the QD/ETL interface, Guanidine chloride (GA

SUBMITTER: Ren Y 

PROVIDER: S-EPMC12713087 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature