Surface morphology and thermal stability of Cu-phthalocyanine (CuPc) films grown on an epitaxially grown MgO(001) layer were investigated by using atomic force microscope and X-ray diffractometer. The (002) textured β phase of CuPc films were prepared at room temperature beyond the epitaxial MgO/Fe/MgO(001) buffer layer by the vacuum deposition technique. The CuPc structure remained stable even after post-annealing at 350°C for 1 h under vacuum, which is an important advantage of device fabrication. In order to improve the device performance, we investigated also current-voltage-luminescence characteristics for the new top-emitting organic light-emitting diodes with different thicknesses of CuPc layer.
Bibliographical noteFunding Information:
This research is funded by the National Research Foundation of Korea (NRF) grants funded by the Ministry of Education, Science and Technology (MEST) (no. 2008-0062239, 2011-0017209, and 2010-0006749). YJB thanks the NRF (no. 2011-0001809) for the financial support.
- Fe/MgO(001) epilayers
- Hybrid organic spintronics hybrid structures
- Organic light-emitting diode
- Thermal stability