Table 1. Photophysical Properties of Cz⁹PhAn.

Cz9PhAn	Solution (CH2Cl2)	Neat film	Doped in film of CBP	Doped in film of mCP	Doped in film of TCTA
λ Abs (nm)	396	404	404	404	404
λ Em (nm)	430	445; 550	445	445	445
φ Q.Y.	∼1	0.25; 0.22	∼1	∼1	∼1
τ Em a (ns)	4.1	0.45; 4.4 c	3.9	4.5	4.2
k r b (s–1)	2.4 × 108	5.6 × 108; 6.7 × 107 d	2.6 × 108	2.2 × 108	2.4 × 108

^a τ _Em: fitted emission lifetime.

^b k _r: calculated radiative decay rate constant.

^cAccompanied with an initial fast rise component whose time constant is fitted to 0.47 ns (470 ps).

^dA lower limit calculated with the assumption of the upper limit of branching (0.75) of excimer formation.