Blue‐to‐red electroluminescence from organic light‐emitting field‐effect transistor using various organic semiconductor materials

Abstract— We succeeded in observing visible bright electroluminescence from blue to red in an organic field‐effect‐transistor structure. In particular, tetraphenylpyrene (TPPy) demonstrated a high photoluminescence efficiency of φ_PL ～ 70% and a maximum electroluminescence efficiency of η_EL ～ 10^?2%. The electroluminescence efficiency (ηEL) was enhanced by using a short source‐to‐drain channel length (L_SD < 1 μm). In addition, doping the TPPy layer with highly fluorescent rubrene molecules led to an #PL of ～100% and a maximum ηEL of 0.8%.