论文信息 - 54.3: Distinguished Paper: White Stacked OLED with 35 lm/W and 100,000 Hours Lifetime at 1000 cd/m2 for Display and Lighting Applications

54.3: Distinguished Paper: White Stacked OLED with 35 lm/W and 100,000 Hours Lifetime at 1000 cd/m2 for Display and Lighting Applications

The three critical parameters to determine the commercial success of organic light-emitting diodes (OLEDs), both in display and lighting applications, are: power efficiency, lifetime, and price competitiveness. PIN technology is widely considered as the preferred way to maximum power efficiency and lifetime. Here we report a high efficiency and long lifetime white light-emitting diode, which has been realized by stacking a blue fluorescent emission unit together with green and red phosphorescent emission units. Novaled proprietary materials have been used in transport layers of each emission unit, which significantly improves the power efficiency and stability. The power efficiency at 1,000 cd/m2 is 35 lm/W with CIE color coordinates of (0.43, 0.44) and a color rendering index (CRI) of 90. An extrapolated lifetime at an initial luminance of 1000 cd/m2 is above 100,000 hours, which fulfils the specifications for most applications. The emission color can also be easily tuned towards the equal energy white for display applications by selecting emitting materials and varying the transport layer cavities.

[1] Jun Endo,et al. 27.5L: Late‐News Paper: Multiphoton Organic EL device having Charge Generation Layer , 2003 .

[2] Oliver Schneider,et al. 17.2: White OLED Structures using Molecularly Doped Charge Transport Layers , 2006 .

[3] Jan Birnstock,et al. High-efficiency and low-voltage p‐i‐n electrophosphorescent organic light-emitting diodes with double-emission layers , 2004 .

[4] Ching Wan Tang,et al. High-efficiency tandem organic light-emitting diodes , 2004 .

[5] T. Riedl,et al. Temperature-independent field-induced charge separation at doped organic/organic interfaces: Experimental modeling of electrical properties , 2007 .