Center for Organic Electronics, National Physical Laboratory (Council of Scientific and Industrial Research), New Delhi, India.
Opt Lett. 2012 Feb 15;37(4):575-7. doi: 10.1364/OL.37.000575.
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.
通过在导电阳极和玻璃基底之间引入纳米结构的氧化铟锡（NSITO）薄膜，提高了有机发光二极管（OLEDs）的外耦合效率。采用射频磁控溅射法在 85°的斜角下制备 NSITO 薄膜。观察到 NSITO 薄膜的折射率显著降低，透光率提高。然后将 OLED 制备在 NSITO 薄膜上，以提取 ITO-玻璃导波模式。提取效率提高了 80%，而对 OLED 的工作电压、电流密度和发射光谱的角不变性没有任何不利影响。
