Silicon-Based Material with Spiro-Annulated Fluorene/Triphenylamine as Host and Exciton-Blocking Layer for Blue Electrophosphorescent Devices
Hua Chen1, Zuo-Quan Jiang2,*（蒋佐权）, Chun-Hong Gao2, Mei-Feng Xu2, Shou-Cheng Dong2, Lin-Song Cui2, Shun-Jun Ji1,*（纪顺俊）, Liang-Sheng Liao2
1Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering, and Materials Science, Soochow University, Suzhou 215123 (P. R. China), Fax: (+86) 0512-65880307
2Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123 (P. R. China), Fax: (+86) 0512-65882846
Chem. Eur. J. 2013，19，11791–11797.
A novel silicon-based compound, 10-phenyl-2′-(triphenylsilyl)-10H-spiro[acridine-9,9′-fluorene] (SSTF), with spiro structure has been designed, synthesized, and characterized. Its thermal, electronic absorption, and photoluminescence properties were studied. Its energy levels make it suitable as a host material or exciton-blocking material in blue phosphorescent organic light-emitting diodes (PhOLEDs). Accordingly, blue-emitting devices with iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N,C2′]picolinate (FIrpic) as phosphorescent dopant have been fabricated and show high efficiency with low roll-off. In particular, 44.0 cd A−1 (41.3 lm W−1) at 100 cd m−2 and 41.9 cd A−1 (32.9 lm W−1) at 1000 cd m−2 were achieved when SSTF was used as host material; 28.1 lm W−1 at 100 cd m−2 and 20.6 lm W−1 at 1000 cd m−2 were achieved when SSTF was used as exciton-blocking layer. All of the results are superior to those of the reference devices and show the potential applicability and versatility of SSTF in blue PhOLEDs.
链接： //onlinelibrary.wiley.com/doi/10.1002/chem.201301106/abstract
