Date

Place

Room B (Room 324)
30. OLED Device I
August 20, 2015 (Thursday)
11:00 ~ 12:35

[30-1]
11:00 ~ 11:25
Title:[Invited] Highly-Efficient Flexible Organic Light-Emitting Diodes On ITO-Free Plastic
Jian-Xin Tang, Qing-Dong Ou, Lei Zhou, Heng-Yang Xiang, and Yan-Qing Li (Soochow Univ., China)
Abstract: Because of their mechanical flexibility, organic light-emitting diodes (OLEDs) hold great promise as a leading technology for display and lighting applications in wearable electronics. The development of flexible OLEDs requires high-quality transparent conductive electrodes (TCEs) with superior bendability and roll-to-roll manufacturing compatibility to replace indium tin oxide (ITO) anodes. Here we present a flexible TCE on plastic with embedded silver networks (PEANs), which exhibits excellent optical, electrical and mechanical properties, allowing little degradation of electrical properties upon bending. By combining an improved outcoupling structure for simultaneously extracting light in waveguide and substrate modes and reducing the surface plasmonic losses, flexible, highly power-efficient large-area green and white OLEDs can be achieved. Flexible green OLEDs yield a power efficiency (PE) > 120 lm/W and current efficiency (CE) >140 cd/A at a brightness of 1000 cd/m2. Moreover, flexible white OLEDs exhibit a maximum external quantum efficiency (EQE) of 49% and a record PE of 106 lm/W at 1000 cd/m2 with angular color stability, which is significantly higher than all other reports of flexible white OLEDs. These results represent an exciting step towards the realization of large-area ITO-free, high-efficiency OLEDs for use in a wide variety of high-performance flexible applications.
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