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Keywords:

  • Organic Light-Emitting Diodes;
  • Thin Films;
  • Amplified Spontaneous Emission;
  • Organic Field-Effect Transistors;
  • Single Crystals
Thumbnail image of graphical abstract

Molecular aggregation greatly affects the fluorescence quantum efficiency, transient lifetime, and amplified spontaneous emission (ASE) of bis-styrylbenzene derivatives. We compare the optical properties for various morphologies (solution, film, doped film, and single crystalline state) (see figure) and demonstrate that ambipolar operation of a 1,4-bis(4-methylstyryl) benzene layer in field-effect transistors leads to intense blue electroluminescence with a rather sharp emission width.