Flexible Characteristics of Novel OLED Materials

Abstract:

Based on two novel organic materials coded as EB515 and EB 47 for fabricating a flexible OLED device, we, herewith, propose a noval testing experiment to demonstrate the electrical, optical, and lifespan performances of a flexible OLED by continuously bending it mechanically. The testing model is designed as the following: continuously cyclic bending 5000 times on a flexible OLED. After foregoing test, the findings show that the leakage current increased in the beginning of bending, then decreased; also the luminance of OLED reduced first, then recoverd. We, therefore, conclude that the reduction of leakage current and luminance may stem from the OLED surface microcracks in the process of bending. Also, after further examination to the surface of substrate by lift-offing the organic layer, we found the organic layer has been impaired and damaged, but the ITO layer remained in good condition.

• Periodical: Applied Mechanics and Materials (Volumes 182-183)
• Pages: 72-75
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.182-183.72
• Online since: June 2012
• Authors: Kun Yi Lee, Cheng Che Lee, Kuen Cherng Lin, Jong Woei Whang, Lin Ling Chu, Hsin Che Lee, Yen Juei Lin, Jiun Haw Lee, Chin Yu Chang, Shu Tang Yeh, Wei Yu Lee
• Keywords: Crack, Flexible, Organic Light-Emitting Device

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