Improved outcoupling efficiency of organic light emitting diodes (OLEDs) is demonstrated by incorporating a nanostructured indium tin oxide (NSITO) film between a conducting anode and a glass substrate. NSITO film was fabricated using rf-sputtering at oblique angle (85°). Significant reduction in refractive index and improved transmission of NSITO film was observed. OLEDs were then fabricated onto NSITO film to extract the ITO-glass waveguided modes. Extraction efficiency was enhanced by 80% without introducing any detrimental effects to operating voltage, current density, and angular invariance of emission spectra of OLEDs.
© 2012 Optical Society of America
Original Manuscript: November 7, 2011
Revised Manuscript: December 6, 2011
Manuscript Accepted: December 20, 2011
Published: February 8, 2012
Arunandan Kumar, Ritu Srivastava, M. N. Kamalasanan, and Dalip Singh Mehta, "Enhancement of light extraction efficiency of organic light emitting diodes using nanostructured indium tin oxide," Opt. Lett. 37, 575-577 (2012)