Light-Emitting Diode of Planar Type Based on Nanocomposites Consisting of Island Au Film and Organic Luminofore Tb(thd)₃

Abstract

Structure, photo-, electroluminescence and electron transport properties of planar nanoscale light-emitting metal-organic device consisting of Au nano-islands and Tb(thd)₃ is reported. FTIR and photoluminescence measurements confirm stable vacuum deposition behavior of Tb(thd)₃ in a monomeric form. With STM imaging, a thickness-dependent structure of Tb(thd)₃ layers was observed and local current-voltage characteristics of organic films were found to be non-linear at voltages exceeding 1.0 V. Electroluminescence from the nanocomposite was observed at voltages 15–30 V, showing the emission features both of Tb(thd)₃ and Au nano-islands. The results can be useful for design of planar light-emitting devices with controllable spectral characteristics.

Keywords:

• electroluminescence
• FTIR spectroscopy
• photoluminescence
• planar nanocomposite
• STM
• Tb(thd)₃ complex

Acknowledgments

This work was partially supported by the National Academy of Sciences of Ukraine (project No. VTS-138) and by the Ministry for Education and Science of Ukraine under the Program “Nanophysics and Nanoelectronics” (project No. M/196-2007).