Abstract
Mechanism of electroluminescence in organic dye films, mechanisms of carrier injection, carrier transport, carrier recombination, creation of molecular excitons, movement of molecular excitons, and emission from molecular excitons, is described. Using high performance electroluminescent devices, three attempts towards novel fields of photophysics and photochemistry of organic solids were performed. First, confinement of molecular excitons within a molecular-size area was reported. Second, emission from triplet excitons produced by electric excitation was observed. Third, the presence of quantum optical size effect of radiation field in organic thin films was demonstrated.
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