New architectures for high performance polymer light-emitting diodes introducing a solution-processed titanium oxide layer

Sun Hee Kim; Jin Young Kim; Sung Heum Park; Kwanghee Lee

doi:10.1117/12.714662

26 February 2007 New architectures for high performance polymer light-emitting diodes introducing a solution-processed titanium oxide layer

Sun Hee Kim, Jin Young Kim, Sung Heum Park, Kwanghee Lee

Author Affiliations +

Proceedings Volume 6486, Light-Emitting Diodes: Research, Manufacturing, and Applications XI; 64860D (2007) https://doi.org/10.1117/12.714662
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

By introducing a solution-based titanium oxide (TiO_x) layer between the polymer and Al electrode in polymer lightemitting diodes, we have demonstrated that the devices exhibit an enhanced efficiency. The TiO_x layer reduces the barrier height between the polymer and Al cathode, thereby facilitating the electron injection in the devices and enhancing the device performance by achieving a balance of charge injection and transport between the electrons and holes. Moreover, we also believe that the TiO_x layers prevent the diffusion of metal ions into the emitting polymers during the Al deposition process, and reduce the degree of quenching centers in the active polymers.

Citation Download Citation

Sun Hee Kim, Jin Young Kim, Sung Heum Park, and Kwanghee Lee "New architectures for high performance polymer light-emitting diodes introducing a solution-processed titanium oxide layer", Proc. SPIE 6486, Light-Emitting Diodes: Research, Manufacturing, and Applications XI, 64860D (26 February 2007); https://doi.org/10.1117/12.714662

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