title: Enhancement of light extraction efficiency of organic light emitting diodes using nanostructured indium tin oxide.
abstract: 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.
authors.affiliation: Center for Organic Electronics, National Physical Laboratory (Council of Scientific and Industrial Research), New Delhi, India.
authors.forename: Arunandan
authors.initials: A
authors.lastname: Kumar
authors.forename: Ritu
authors.initials: R
authors.lastname: Srivastava
authors.forename: M N
authors.initials: MN
authors.lastname: Kamalasanan
authors.forename: Dalip Singh
authors.initials: DS
authors.lastname: Mehta