Fig. 3. (a) A schematic diagram illustrating the photodynamics of Cz9PhAn solid thin film upon photoexcitation. Ea 0.44 (kcal mol–1): the activation energy of excimer formation. (b) The side view of two Cz9PhAn slabs for which excimer formation may be associated with M–M* (M denotes Cz9PhAn) interaction assisted by the lattice motion. Also shown are the face-to-edge frontier orbitals of two Cz9PhAn slabs. HOMO is in pink and LUMO is in green.
