| Title |
Enhanced Performance of the OLED with Plasma Treated ITO and Plasma Polymerized Methyl Methacrylate Buffer Layer |
| Authors |
임재성(Lim Jae-Sung) ; 신백균(Shin Paik-Kvun) |
| Keywords |
OLED ; Plasma Treatment ; Plasma Polymerization ; ppMMA |
| Abstract |
Transparent indium tin oxide (ITO) anode surface was modified using O_3 Plasma and organic ultrathin buffer layers were deposited on the ITO surface using 13.56 MHz RF plasma polymerization technique. The EL efficiency, operating voltage and lifetime of the organic light-emitting device (OLED) were investigated in order to study the effect of the plasma surface treatment and role of plasma polymerized organic ultrathin buffer layer. Poly methylmethacrylate (PMMA) layers were plasma polymerized on the ITO anode as buffer layer between anode and hole transport layer (HTL). The plasma polymerization of the organic ultrathin layer were carried out at a homemade capacitive-coupled RF plasma equipment. N,N'-diphenyl-N,N'(3- methylphenyl)-1,1'-diphenyl-4,4'-diamine (TPD) as HTL, Tris(8-hydroxyquinolinato) Aluminum (Alq_3) as both emitting layer (EML)/electron transport layer (ETL), and aluminum layer as cathode were deposited using thermal evaporation technique. Effects of the plasma surface treatment of ITO and plasma polymerized buffer layers on the OLED performance were discussed. |