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Organic complementary ring oscillators using a functional polymer interfacial layer for highly improved oscillation frequency

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Abstract

We report the improved oscillation frequency of the organic complementary ring oscillators by balancing mobilities of p- and n-type organic field-effect transistors (OFETs) with a functional polymer interfacial layer. By employing poly (methyl methacrylate) (PMMA) as the interfacial layer, the balanced performance of the p- and n-type OFETs was achieved, which resulted in the improved performance of the complementary inverters. With the PMMA interfacial layer, the noise margin was increased from 35 % to 80 % of 1/2 supply voltage, and the maximum gain was 1.5 times higher than the one of the complementary inverter without the interfacial layer. The oscillation frequency of the organic complementary ring oscillators was remarkably improved from 106.7 Hz to 1.4 kHz. The polymer interfacial layer to balance the performance of p- and n-type OFETs is found to be a simple and efficient way to facilitate the operation of the organic complementary ring oscillators.

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Acknowledgments

This work was supported by the Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy (No. 20124010203170).

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    Authors and Affiliations

    1. Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, 08826, Korea

      Jeongkyun Roh, Heebum Roh, Hyeonwoo Shin & Changhee Lee

    2. Construction Equipment Technology Center, Korea Institute of Industrial Technology (KITECH), Gyeongsan, 38430, Korea

      Hyeok Kim

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    1. Jeongkyun Roh
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    2. Heebum Roh
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    Correspondence to Hyeok Kim or Changhee Lee.

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    J. Roh and H. Roh contributed to this work equally.

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    Roh, J., Roh, H., Shin, H. et al. Organic complementary ring oscillators using a functional polymer interfacial layer for highly improved oscillation frequency. Polym. Bull. 73, 2531–2537 (2016). https://doi.org/10.1007/s00289-016-1681-8

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    • DOI: https://doi.org/10.1007/s00289-016-1681-8

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