Turn on of sky-blue thermally activated delayed fluorescence and circularly polarized luminescence (CPL) via increased torsion by a bulky carbazolophane donor

Abstract

The carbazolophane (Czp) donor unit is introduced to the design pool of donors in TADF emitters.

Highly Fluorescent Emitters Based on Triphenylamine‐π‐Triazine (D‐π‐A) System: Effect of Extended Conjugation on Singlet‐Triplet Energy Gap

“…The predicted values of S 1 and ΔE ST for DPA-TRZ align with those predicted for CzPhTRZ (S 1 = 3.27 eV, T 1 = 2.89 eV and ΔE ST = 0.38) while the T 1 state is significantly more stabilized at the same level of theory. [21]…”

Maximizing Chiral Perturbation on Thermally Activated Delayed Fluorescence Emitters and Elaboration of the First Top‐Emission Circularly Polarized OLED

“…[11] Zysman-Colman et al have used a chiral carbazolophane donor unit (indolo [2.2]paracyclophane) to design CP-TADF molecules showing interesting chiroptical properties (g lum = 1.3 × 10 −3 in toluene solution) and high electroluminescent performances (EQE up to 17%). [12] Finally, the most recent molecular design to construct CP-TADF molecules has been described by the group of Chen. Their elegant approach relies on the so-called chiralemitting-skeleton strategy where two fluorophores with no chirality and no TADF were linked together in order to produce axially chiral blue emitting CP-TADF molecule with high g lum values of 4.5 × 10 −3 in solution.…”

Lanthanide MOFs for inducing molecular chirality of achiral stilbazolium with strong circularly polarized luminescence and efficient energy transfer for color tuning

“…Circularly polarized luminescence (CPL) has attracted more and more interest in recent years owing to potential applications such as in photoelectric devices, 1 nonlinear optics, 2,3 CPL sensors, 4 biological probes, 5 and organic light-emitting diodes (OLEDs). 6,7 CPL is the differential emission intensity of chiral luminescent species upon excitation by the right-or le circularly polarized light. It is deeply associated with the structures of excited states of chiral luminescent species.…”