Anthracene-dibenzofuran based electron transport type hosts for long lifetime multiple resonance pure blue OLEDs

Bulky Passivation by an Electroactive Phosphonate Dendrimer for High-Performance Perovskite Quantum Dot Light-Emitting Diodes

“…To investigate the electron transport behavior for TPCA and TPPO devices, electron-only devices (EOD) were prepared, and the current density–voltage (J–V) curves are shown in Figure S6. The current density at the same driving voltage for TPPO EOD is higher than that of the TPCA device, which may indicate unbalanced charge transport. , Impedance spectroscopy was used to investigate the exciton formation and quenching as well as charge transport balance because this method detects the change of recombination resistance affected by the exciton and charge (Figure c, Table S2). A simple resistance-capacitance (RC) circuit is adopted to model the EL process in PeQLEDs.…”

Acceptor–donor–acceptor based thermally activated delayed fluorescent materials: structure–property insights and electroluminescence performances

“…[58][59][60][61][62][63] These materials manifested narrowband emission with a full width at half maximum (FWHM) of o40 nm due to the suppressed vibronic transitions and advantageous short-range charge transfer (SRCT) characteristics. 59,[64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80][81] Recently, based on the boron acceptors in A-D-A based design, Kwon et al achieved the highly stable red TADF-OLEDs with a horizontal dipole orientation of over 0.74 and a maximum EQE of 30.3% with extremely low roll-off characteristics. 82 Later, several A-D-A based TADF materials were developed for wide color gamut regions with excellent EQEs over 30% with good TADF properties, high PLQYs, and high molecular orientations.…”

Multiresonant TADF materials: triggering the reverse intersystem crossing to alleviate the efficiency roll-off in OLEDs

“…30,35,44,54–61 Such broad spectra are observed due to the vibronic transitions between the ground and excited states. 29,44,54–59,62–64 Such broad emission negatively impacts the color purity of the emitters and imperils their practical applicability, which needs to be resolved from the molecular design perspective.…”