TADF dendronized polymer with vibrationally enhanced direct spin-flip between charge-transfer states for efficient non-doped solution-processed OLEDs

Combining molecular encapsulation and an AIE strategy to construct an efficient blue TADF polymer for solution-processed multilayer white OLEDs

“…24 As for the side-chain TADF polymers, a series of copolymers with bulky spacer units and pendant TADF groups have been developed. 25–29 By up-loading the bulky spacer contents, Bryce and coworkers also demonstrate that a non-conjugated side-chain TADF polymer also can achieve a high EQE of 20.1%. 30…”

“…24 As for the side-chain TADF polymers, a series of copolymers with bulky spacer units and pendant TADF groups have been developed. [25][26][27][28][29] By up-loading the bulky spacer contents, Bryce and coworkers also demonstrate that a non-conjugated side-chain TADF polymer also can achieve a high EQE of 20.1%. 30 Although polymerization enables a powerful system through the integrated assembly of components, most of the reported TADF polymers must be doped in a suitable small molecular host to achieve high device efficiency due to a compact molecular chain induced aggregation-induced quenching of TADF units.…”

Exciplex polymer with strong AIE for constructing fully-solution-processed organic light-emitting diodes with 100-fold efficiency improvement compared to physically blended exciplex

“…16,17 Based on such a design strategy, a lot of polymers with excellent TADF properties and high luminance efficiency have been reported. [18][19][20] To further extend the material design idea and avoid the influence of D-A direct connection, exciplex materials with separated donors and acceptors have also been explored to achieve specific TADF through space charge transfer. [21][22][23][24] Because of the spatially separated highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), exciplex materials exhibit an intrinsic decreased exchange energy that simultaneously results in a small singlet-triplet energy gap (ΔE ST ), which is beneficial for reverse intersystem crossing (RISC) of triplet energy.…”

“…16,17 Based on such a design strategy, a lot of polymers with excellent TADF properties and high luminance efficiency have been reported. 18–20…”

Vibration‐Regulated Multi‐State Long‐Lived Emission from Star‐Shaped Molecules

“…[10] However, we noted that such vibroniccoupling-promoted TADF is only observed in solution. [11] It is rarely found in the solid state. One reason may be that most molecules suffer from aggregation-induced quenching (ACQ) of emission in the solid state.…”