Nanomaterials (Dec 2022)

N-Type Printed Organic Source-Gated Transistors with High Intrinsic Gain

  • Yudai Hemmi,
  • Yuji Ikeda,
  • Radu A. Sporea,
  • Yasunori Takeda,
  • Shizuo Tokito,
  • Hiroyuki Matsui

DOI
https://doi.org/10.3390/nano12244441
Journal volume & issue
Vol. 12, no. 24
p. 4441

Abstract

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Source-gated transistors (SGTs) are emerging devices enabling high-gain single-stage amplifiers with low complexity. To date, the p-type printed organic SGT (OSGT) has been developed and showed high gain and low power consumption. However, complementary OSGT circuits remained impossible because of the lack of n-type OSGTs. Here, we show the first n-type OSGTs, which are printed and have a high intrinsic gain over 40. A Schottky source contact is intentionally formed between an n-type organic semiconductor, poly{[N,N′-bis(2-octyldodecyl)naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)} (N2200), and the silver electrode. In addition, a blocking layer at the edge of the source electrode plays an important role to improve the saturation characteristics and increase the intrinsic gain. Such n-type printed OSGTs and complementary circuits based on them are promising for flexible and wearable electronic devices such as for physiological and biochemical health monitoring.

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