journal article·2025-01

Achieving Unipolar Organic Transistors for Complementary Circuits by Selective Usage of Doped Organic Semiconductor Film Electrodes

Ping‐An Chen, Jing Guo, Huan Wei, Jiangnan Xia, Chen Chen, Huajie Chen, Ting Lei, Lang Jiang, Lei Liao, Yuanyuan Hu

Advanced Functional Materials· Volume 35· Issue 3
Publisher page

Abstract

Abstract Unipolar p‐ and n‐type organic field‐effect transistors (OFETs) are essential for constructing organic circuits and complementary designs crucial for high‐performance electronics. Traditionally, fabricating these transistors requires separate p‐type and n‐type organic semiconductors (OSCs), which complicates the process due to intricate patterning, protection of the first OSC layer, and considerable material wastage. In this work, an innovative approach is introduced, inspired by silicon transistor fabrication to obtain unipolar OFETs, employing a single ambipolar OSC in conjunction with doped organic semiconductor films (DOSCFs) as electrodes. This results demonstrate that OFETs with DOSCF electrodes suppress ambipolarity dramatically and achieve on/off ratios that are two to three orders of magnitude higher than those with metal electrodes, along with excellent stability. The unipolar characteristics of the devices are attributed to the unique work function properties and the intrinsic charge carrier behavior of the DOSCF electrodes. Significantly, inverter circuits utilizing these unipolar transistors outperformed traditional ambipolar transistors with metal electrodes, achieving a fivefold increase in voltage gain. This novel strategy promises to enhance the practicality and economic viability of organic electronics, paving the way for more sustainable and high‐performance circuit designs.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Advanced Memory and Neural Computing

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

International Science and Technology Innovation Cooperation Base for Advanced Display Technologies of Hunan Province College of Semiconductors (College of Integrated Circuits) Hunan University Changsha 410082 China

Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education School of Physics and Electronics Hunan University Changsha 410082 China

Shenzhen Research Institute of Hunan University Shenzhen 518063 China

Science and Technology on Advanced Ceramic Fibers and Composites Laboratory College of Aerospace Science and Engineering National University of Defense Technology Changsha 410000 China

Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 China

Key Laboratory of Polymer Chemistry and Physics of Ministry of Education School of Materials Science and Engineering Peking University Beijing 100871 China

Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Department of Science and Technology of Hunan Province · Science, Technology and Innovation Commission of Shenzhen Municipality

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