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Effects of transparent MPTMS/Ag/MoO3 structure as anode on the performance of green organic light-emitting diodes

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Abstract

A transparent 3-mercaptopropyl trimethoxysilane (MPTMS)/Ag/MoO3 composite anode is introduced to fabricate green organic light-emitting diodes (OLEDs). Effects of the composite anode on brightness and operating voltage of OLEDs are researched. By optimizing the thickness of each layer of the MPTMS/Ag/MoO3 structure, the transmittance of MPTMS/Ag (8 nm)/MoO3 (30 nm) reaches over 75% at about 520 nm. The sheet resistance is 3.78 Ω/□, corresponding to this MPTMS/Ag (8 nm)/MoO3 (30 nm) structure. For the OLEDs with the optimized anode, the maximum electroluminescence (EL) current efficiency reaches 4.5 cd/A, and the maximum brightness is 37 036 cd/m2. Moreover, the OLEDs with the optimized anode exhibit a very low operating voltage (2.6 V) for obtaining brightness of 100 cd/m2. We consider that the improved device performance is mainly attributed to the enhanced hole injection resulting from the reduced hole injection barrier height. Our results indicate that employing the MPTMS/Ag/MoO3 as a composite anode can be a simple and promising technique in the fabrication of low-operating voltage and high-brightness OLEDs.

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Authors and Affiliations

  1. National Engineering Laboratory for Special Display Technology, Key Laboratory of Special Display Technology, Ministry of Education of China, Province and Ministry State Key Laboratory of Advanced Display Technology, Hefei, 230009, China

    Jun-tao Hu  (胡俊涛), Ya-fei Deng  (邓亚飞), Wen-juan Mei  (梅文娟) & Jing-song Yang  (杨劲松)

  2. Academy of Photoelectric Technology, Hefei University of Technology, Hefei, 230009, China

    Jun-tao Hu  (胡俊涛), Ya-fei Deng  (邓亚飞), Wen-juan Mei  (梅文娟) & Jing-song Yang  (杨劲松)

  3. School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei, 230009, China

    Ya-fei Deng  (邓亚飞)

Authors
  1. Jun-tao Hu  (胡俊涛)
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  2. Ya-fei Deng  (邓亚飞)
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  3. Wen-juan Mei  (梅文娟)
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  4. Jing-song Yang  (杨劲松)
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Corresponding author

Correspondence to Jun-tao Hu  (胡俊涛).

Additional information

This work has been supported by the National Natural Science Foundation of China (No.21174036), the National High Technology Research and Development Program of China (863 Program) (No.2012AA011901), and the National Basic Research Program of China (973 Program) (No.2012CB723406).

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Hu, Jt., Deng, Yf., Mei, Wj. et al. Effects of transparent MPTMS/Ag/MoO3 structure as anode on the performance of green organic light-emitting diodes. Optoelectron. Lett. 11, 333–337 (2015). https://doi.org/10.1007/s11801-015-5125-8

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  • DOI: https://doi.org/10.1007/s11801-015-5125-8

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