Stable Pincer Gold(III)-TADF Emitters with Extended Donor-Acceptor Separation for Efficient Vacuum-Deposited OLEDs with Operational Lifetime (LT₉₅) up to 3831 h at 1000 cd m^-2.

ABSTRACT: Although gold-TADF (thermally activated delayed fluorescence) emitters have attractive prospects as next-generation practical OLED emitters, the performance of OLEDs utilizing gold(I)- and gold(III)-TADF emitters lags behind the requirements of practical applications, and device lifetime has become a bottleneck. Here, novel pincer gold(III)-TADF emitters that are easily fabricated with tunable donor and acceptor ligands are presented. These pincer gold(III)-TADF emitters exhibit an extended molecular π-distance along the transition dipole moment, resulting in a significant reduction in the electron exchange energy between the S₁ and T₁ excited states, thus narrowing the singlet-triplet energy gap (ΔE_ST). The combination of small ΔE_ST and heavy-at

SUBMITTER: Shu HX 

PROVIDER: S-EPMC12279227 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature