Langmuir-Blodgett(LB)film technique makes it possible to prepare organic functional ultrathin films with a controlled thickness at a molecular size and well-defined molecular orientation.Therefore
if any electroluminescent(EL)materials can be incorporated in LB films
the films will be fabricated more conveniently than by general vacuum deposited technique and may have potential applications in molecular electronic devices.In the EL devices with LB films as emitting layer
the constitute and thickness of the emitting layer can be exactly controlled and this layer can be fabricated at room temperature and at atmospheric pressure.This paper reviews the LB films materials used as the emitting layers
hole-transporting materials and electron-transporting materials in EL devices.The influence of the number of the layers of LB films and the deposited surface pressure on the
I-V
characteristics
EL intensity
as well as break-down voltage of the EL devices are presented by taking amphiphilic 8-hydroxyquinoline complexes as examples.The existent problems and further development of EL devices with LB films as emitter are commented as a conclusion remark.