Polymer light-emitting devices based on plasma-polymerized benzene and plasma-polymerized naphthalene

Polymer light-emitting devices (PLED) were fabricated utilizing plasma-poly merized benzene (PPB) and plasma-polymerized naphthalene (PPN) as an electr oluminescent (EL) emitting layer. The plasma polymerization is well suited for forming the transparent, sturdy thin film for EL polymer layers. For th e ITO/PPB/Al and ITO/PPN/Al devices, the turn-on voltage of the device was at 12V and 6V, respectively. The luminance of the PPB device reached 6cdm(- 2) at 10 V, whereas the PPN device reached 11cdm(-2) at 14 V. The external quantum efficency was 0.0035% for the PPB device and 0.0056% for the PPN de vice. The dense crosslinked structure formed by the plasma polymerization m akes the EL device relatively stable during operation. (C) 2001 Kluwer Acad emic Publishers.