Sol-gel deposited gallium-doped zinc oxide electrode for polymer light-emitting diode applications

摘要

We have made a sol-gel deposited gallium-doped zinc oxide (GZO) film as a transparent conductive anode in polymerlight-emitting diode (PLED) applications. The GZO films were obtained by spin-coating GZO precursor solutionsfollowed by consecutive thermal annealing in the air and in the hydrogen-rich atmosphere. The resistance of GZO filmwas reduced to ~100 Ω/□ after thermal annealing in the hydrogen environment. Its surface roughness was sufficientlylow (1.159 nm RMS) for depositing other polymer layers. We have fabricated PLEDs with quartz substrate / solution-processedGZO electrode (anode) / PEDOT:PSS (HITL) / SPG-01T (Green polymer light-emitting material purchasedfrom Merck, EML) / Ca (EIL) / Al (Cathode). The fabricated devices showed current efficiency of 3.06 cd/A and powerefficiency of 1.25 lm/W at luminance of 1000 cd/msup2/sup.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.