Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 3, Issue 31, Pages 8066-8073Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc01211b
Keywords
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Funding
- National Basic Research Program of China (973 Program) [2010CB327703]
- National Natural Science foundation of China [50802117]
- Program for New Century Excellent Talents in University [NCET-12-0573]
- National Project for the Development of Key Scientific Apparatus [2013YQ12034506]
- Natural Science foundation of Guangdong Province [S2012010010519]
- China Scholarship Council Fund for Young Backbone Teacher
- Science and Technology Department of Guangdong Province
- Education Department of Guangdong Province
- Science and Technology Department of Guangzhou City
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Although 9,10-bis(4-(1,2,2-triphenylvinyl)styryl)anthracene (TPE-An) with excellent aggregation-induced emission (AIE) properties can effectively enhance the luminescence efficiency of light-emitting materials, the practical TPE-An-emitting electroluminescent (EL) devices have not been successfully fabricated until now. In our paper, the energy-band diagram of TPE-An is determined by the combination of ultraviolet-visible (UV-Vis) spectroscopy and cyclic voltammetry (CV) techniques. Subsequently, the space-charge-limited-current (SCLC) method is firstly used to obtain the hole mobility of TPE-An and design a better EL device structure. By calculation, the maximum hole mobility of the 50 nm TPE-An film can arrive at 4.00-10-4 cm(2) V-1 s(-1) at 0.1 MV cm(-1) field. Finally, TPE-An-emitting EL devices have been, respectively, fabricated on glass and flexible PET substrates. Both of these two EL devices exhibit an intense green-light emission at 515 nm. Moreover, the maximum luminance of the EL device on glass can reach 24721.8 cd m(-2) at 10.0 V, and its maximum current efficiency is as high as 14.7 cd A(-1) at 131.6 mA cm(-2). It is noted that the flexible EL device on the PET substrate maintains a stable emission and nice working performance even if the bending angles arrive at 140 degrees. Therefore, it suggests that TPE-An should have a promising future in EL device applications.
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