Difluorodithieno[3,2-a:2′,3′-c]phenazine as a strong acceptor for materials displaying thermally activated delayed fluorescence or room temperature phosphorescence

Bridge control of photophysical properties in benzothiazole-phenoxazine emitters – from thermally activated delayed fluorescence to room temperature phosphorescence

“…Heavy atoms, such as sulfur, are known to afford stronger SOC effects, leading to higher ISC rates, and thereby increasing the chance for RTP to occur. [48][49][50][51][52][53][54] In addition, Fig. 5 Schematic representation of the ground and excited state energy levels with their corresponding CT/LE character and the spin-orbit coupling values (in cm À1 ) between these various excited states as obtained using TDDFT calculations with LC-BLYP (o = 0.17 bohr À1 )/6-311G(d) under the TDA and applying the PCM (cyclohexane).…”

“…Heavy atoms, such as sulfur, are known to afford stronger SOC effects, leading to higher ISC rates, and thereby increasing the chance for RTP to occur. 48–54 In addition, the ground and excited state energy difference densities (Fig. 5 and Fig.…”

Not the sum of their parts: understanding multi-donor interactions in symmetric and asymmetric TADF emitters

“…Much work has been carried out to discover chemical motifs that minimize the DE ST gap, and correspondingly maximize rISC. [11][12][13][14][15][16] As a result of this multidisciplinary work, generic design rules for successful TADF emitters have emerged. 17 Primarily, bridging of sterically hindered electron donor (D) and acceptor (A) groups in a twisted D-A architecture commonly results in weakly overlapping highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO).…”

Rational Molecular Design Enables Efficient Blue TADF−OLEDs with Flexible Graphene Substrate

“…Surprisingly, the effect of the other key player in the equation, H SO , has been largely overlooked by the community as it is not as straightforward to investigate or engineer as the types of D and A subunits and their connectivity. [ 4–14 ]…”

“…Surprisingly, the effect of the other key player in the equation, H SO , has been largely overlooked by the community as it is not as straightforward to investigate or engineer as the types of D and A subunits and their connectivity. [4][5][6][7][8][9][10][11][12][13][14] Alongside high efficiencies, one of the unique abilities of OLEDs compared to other lighting sources is the possibility of creating flexible devices; hence, alternative flexible anodes and substrates have attracted significant attention from OLED community in recent years. [15,16] ITO is the most common transparent anode for conventional OLEDs due to its superior optical and electrical properties.…”