52.2: Hybrid Tandem White OLEDs with High Efficiency and Long Life‐time for AMOLED Displays and Solid‐State Lighting

Abstract

Excellent performance (61 cd/A efficiency, 27% EQE, 6.2 V, 6500 K white point, 35,000 h half-life) was obtained using 2-stack hybrid tandem white OLED. This is >70% EQE improvement over the all-fluorescent tandem white resulting in >30% reduction in power consumption for a 32" AMOLED HDTV. Hybrid Tandems for lighting show , and lifetime between 70,000 and 125,000 h without outcoupling.

Highly Efficient Hybrid White Tandem Organic Light‐Emitting Diodes with MoO3 Layer

“…One uses two identical white color emitting EL unit, [2,4,5] the other uses different color (complementary color such as blue and yellow) emitting EL units. [6][7][8] The former is called symmetric tandem OLEDs, while the latter is called asymmetric tandem OLEDs. Maximum current efficiency of 23.9 cd/A, power efficiency of 7.8 lm/W, and EQE of 8.5% have been obtained from symmetric tandem white OLED with two identical fluorescence EL units.…”

A Novel Lighting OLED Panel Design

“…Using high efficacy material [2], optimum devices [3], tandem structures [4], and outcoupling technology [5], the power efficacy of the WOLED panel can reach 100 lm/W in the market and 400 lm/W in the laboratory [6]. Compared with the LED lighting product, the OLED lighting product is dramatically different in appearance and performance.…”

66.4: Large‐Sized Flexible Lighting with Highly Efficient OLEDs

“…Methods for fabricating a highly efficient OLED have been researched for a long time; and the use of multi-layer structures [5][6][7] or phosphorescent devices [8][9][10][11] have been proposed. In particular, as a method for fabricating a highly efficient OLED lighting, using a tandem structure or an all-phosphorescent device has been proposed [12][13][14]. However, a tandem OLED needs more organic layers and thus needs many formation processes.…”