Exciton Coherence in Solution-Processed, Crystalline Octabutoxy-Phthalocyanine (H2OBPc) Thin Films

We investigate excitonic states in crystalline solution-processed small molecules thin films using ultrafast spectroscopy techniques. In transient absorption, we resolve the photoinduced absorption signature of short lived coherent excitonic state alongside long-lived Frenkel excitons.