Kum Hee Lee, Lee Kyung Kang, Jin Yong Lee, Sunwoo Kang, Soon Ok Jeon, Kyoung Soo Yook, Jun Yeob Lee and Seung Soo Yoon Molecular Engineering of Blue Fluorescent Molecules Based on Silicon End-Capped Diphenylaminofluorene Derivatives for Efficient Organic Light-Emitting Materials Advanced Functional Materials 20
Highly efficient blue organic light-emitting diodes are developed using dopant materials based on a 2-diphenylaminofluoren-7-yl-vinylarene core with various silicon-substituted end-capping groups. The best luminous efficiency of 11.2 cd A−1 and highest quantum efficiency of 7.34% at 20 mA cm−2 are obtained in a device with CIE coordinates (0.15, 0.25). A deep-blue OLED with CIE coordinates (0.15, 0.14) exhibits a luminous efficiency of 3.70 cd A−1 and a quantum efficiency of 3.47% at 20 mA cm−2.
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