Diphenylaminofluorene-Based Donor-Acceptor Molecules for Blue Light-Emitting Diodes

作者：Lee Kum Hee; Oh Suhyun; Lee Seok Jae; Kim Young Kwan^*; Yoon Seung Soo

来源：Molecular Crystals and Liquid Crystals, 2012, 563(1): 206-214.

DOI：10.1080/15421406.2012.689719

• Blue fluorescentmaterials
• deep-blue emittingmaterials
• diphenylaminofluorene derivatives
• organic light-emitting diode

A series of blue fluorescent 2-diphenylaminofluorene-7-ylstyrene derivatives end-capped with electron-accepting groups, such as methylpyridine, qunoline, isoqunoline, phenanthridine were synthesized and characterized. To examine the electroluminescent properties of these molecules, multilayer devices were fabricated. The device D exhibited highly efficient blue emission with a luminous efficiency (LE), power efficiency (PE) and CIEx,y coordinates of 7.13 cd/A, 2.80 lm/W at 20 mA/cm(2) and (0.148, 0.191) at 7.0 V, respectively. In addition, the device A showed efficient deep-blue emission with a LE, PE and CIEx, y coordinates of 6.85 cd/A, 2.68 lm/W at 20 mA/cm(2), and (0.147, 0.152) at 7.0 V, respectively.

• 出版日期2012