Transient characteristics of organic light-emitting diodes with efficient energy transfer in emitting material |
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| Authors: | Takeshi Fukuda Bin Wei Musubu Ichikawa Yoshio Taniguchi |
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| Affiliation: | aDepartment of Functional Materials Science, Saitama University, 255 Shimo-Ohkubo, Sakura-ku, Saitama-shi, Saitama 338-8570, Japan;bKey Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, P.O.B. 143, 149 Yanchang Road, Shanghai 200072, PR China;cShinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan |
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| Abstract: | We have investigated the combination effect of host–guest materials in an emitting layer on the transient property of an organic light-emitting diode (OLED). We found that an efficient energy transfer owing to the large overlap between the photoluminescence spectrum of host material and the absorption spectrum of guest material was an important factor to improve the response speed of the OLED. As a result, the rise time of optical response was mainly affected by the combination of host–guest materials, and it increased using the optimal guest material, 1,4-bis[2-[4-N,N-di(p-tolyl)amino]phenyl]vinyl]benzene (DSB). A maximum −3 dB cutoff frequency of 15.8 MHz was achieved for an OLED with DSB as a guest material. |
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| Keywords: | Organic light-emitting diode Transient characteristics Energy transfer Host– guest material |
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