Highly efficient and negligible efficiency roll-off non-doped blue electroluminescence with a synergistic effect of fast-balanced carrier transport and appropriate hybridized excited states.

ABSTRACT: The most critical scientific problem for efficient blue emitters is to solve the inherent contradiction between wide bandgap characteristics and difficult carrier injection/unbalanced transmission. Herein, three donor-π-acceptor (D-π-A) type blue materials (TPACFTAZ, 9PCZCFTAZ, and 3PCZCFTAZ) based on fluorene-bridged and triazine acceptors were designed and synthesized. By regulating the donor strength and substitution sites, the synergistic optimization of solid-state aggregation mode and excited state characteristics has been achieved. Single crystal analysis shows that 3PCZCFTAZ exhibits the most abundant and effective intermolecular forces, obtaining fast-balanced carrier transport with electron and hole transport rates of 10.60 × 10^-5 cm² V^-1 s^-1

SUBMITTER: Zhou H 

PROVIDER: S-EPMC12495309 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature