Figure 5: Time- and polarization-resolved PL decay dynamics with varying crystal aspect ratio.
From: Directional charge separation in isolated organic semiconductor crystalline nanowires
(a,d,g) PL images of TAT nanowire, crystal and nanocrystallite, respectively, Scale bar, 300 nm. (b,c,e,f,h,i) X- and Y-polarized PL decays from nanowire, crystal, and nanocrystallite for excitation along the y axis. For the nanowire (a), the Y-polarized PL (b) follows a power-law decay (μ=2.3), while the X-polarized PL decay (c) is bi-exponential (γ1=5.1 ns and γ2=20.2 ns). For the crystal (d), both polarization channels (e,f) show power-law decay with μX=2.7 and μY=2.6. For the nanocrystallite (g), luminescence also follows a power-law decay in both polarization channels (h,i) with μX≈μY=4.5.
