Ye. Kim et al., PMMA LANGMUIR-BLODGETT-FILMS INSERTED IN A POLYMER LIGHT-EMITTING DIODE TO IMPROVE QUANTUM EFFICIENCY, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 294, 1997, pp. 123-126
PMMA Langmuir-Blodgett film is found to be an ideal insulating layer p
ossessing good film forming ability with controllability of thickness
in nanometer range and small number density of pinholes. Electrolumine
scence efficiency of a light emitting device is improved significantly
when the several nanometer thick LB films are inserted in the device
between an emitting layer and an aluminum cathode.