A Smart Light-Controlled Carrier Switch in an Organic Light Emitting Device

Authors

  • Z. Zhang,

    1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China)
    2. Fire Department of Ganzhou City, Ganzhou 341000, Jiangxi Province (P.R. China)
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  • X. Liu,

    1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China)
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  • Z. Li,

    1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China)
    2. Department of Chemical Engineering, Jilin Institute of Chemical Technology, Jilin 132022 (P.R. China)
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  • Z. Chen,

    1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China)
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  • F. Zhao,

    1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China)
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  • F. Zhang,

    1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China)
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  • C.-H. Tung

    1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China)
    2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080 (P.R. China)
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  • The work was supported by the National Natural Science Foundation of China (grant nos. 20333080, 20572059, 20502013 and 20773077), and the Ministry of Science and Technology of China (grant no. 2007CB808000). The authors would like to acknowledge Prof. Liduo Wang and Dr. Lian Duan, of the Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, for their suggestions in preparation of the OLED.

Abstract

A real ON–OFF carrier switch based on a new ferrocenyl diarylethene compound (DTE-FC) as the light-sensitive and photoswitching layer in an organic light-emitting device (OLED) with a multilayer sandwich structure has been prepared. This switch layer functions not only as a hole transporter but also as a good barrier block when needed, which arises from the light-induced photochromic effect of the DTE-FC. For the uncolored open-ring form of DTE-FC, no luminescence was observed despite the increase in applied voltage. On the contrary, for the colored photostationary state of DTE-FC, which was obtained by irradiation with 365 nm light, the luminescence could be observed when the applied voltage reached 14.0 V and increased with applied voltage. Thus, the uncolored state corresponds to the OFF state of luminescence and the photostationary state corresponds to the ON state. The two states can be interconverted by control of the UV and visible light (>500 nm) irradiation.

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