Licht-im-Terrarium: Literaturdatenbank

Organic light-emitting devices (OLEDs) are electroluminescence devices based on organic molecules with simple sandwiching structures (Tang and Vanslyke 1987; Sun et al. 2006; Schwartz et al. 2006). After the discovery of an efficient bilayer OLED technology in 1987, OLEDs have attracted much attention because of their potential applications in full-color flat-panel displays and high-efficiency lightings. Device architecture was studied intensively (Pfeiffer et al. 2002; Baldo et al. 1998a; Adachi et al. 2001). Its short lifetime that has been a roadblock to development is now tackled. Some OLEDs show a lifetime of more than 200 Khrs (D’Andrade et al. 2008). Material systems commercially available at present showed that OLED technology was considered as a possible next lighting technology (Wang et al. 2009a, b; Wang and Ma 2010; Reineke et al. 2013; Sasabe and Kido 2011). The power efficiency of OLEDs developed by Novaled has reached 124 lm/W with a 3D light extraction system (Reineke et al. 2009), and the power efficiency of commercially available large-area white OLEDs by LG Chem is over 80 lm/W by using internal and external out-coupling technology (Moon et al. 2013), which are high enough to replace a bulb and even a fluorescent lamp. These improvements in technology and product development have led to an explosive growth in the number of OLED lighting patents being filed as well as scientific publications.