Figure 9.

Fluorescence lifetime modulation TADF. (a) Donor (red) and acceptor (blue) geometry of TADF molecules and 59. (b) Photoluminescence lifetime of 59 measurement in cyclohexane at room temperature. (c) HOMO (left) and LUMO (right) of 59. (d) HOMO and LUMO orbital distributions and calculated bandgaps, S₁ and T₁ energy levels, and oscillator strengths (f) for 60. (e) Structure of 61. (f) Structure of 62. (g) HOMO (left) and LUMO (right) of 61. (h) HOMO (left) and LUMO (right) of 62. (a–c) Reprinted with permission from ref (48). Copyright 2015, American Chemical Society. (d) Reprinted with permission from ref (49). Copyright 2017, American Chemical Society. (g, h) Reprinted with permission from ref (51). Copyright 2019, Wiley-VCH.