Switching of Transfer Characteristics of an Organic Field-Effect Transistor by Phase Transitions: Sensitive Response to Molecular Dynamics and Charge Fluctuation
Source abstract
Abstract
An organic field-effect transistor was fabricated using an anthracene–tetracyanoquinodimethane (AN–TCNQ) single-crystal charge-transfer (CT) complex as the semiconductor material. The CT complex showed molecular dynamics related to reorientational motion of an AN molecule at room temperature. The transfer characteristics drastically changed when the temperature decreased from room temperature to 90 K: n-type → ambipolar-type → p-type → ambipolar-type. From thermal analysis, AN–TCNQ underwent two phase transitions when the temperature decreased from room temperature to 120 K. To clarify the mechanism of the drastic changes of the transfer characteristics, the crystal and electronic structures of AN–TCNQ at various temperatures were investigated by X-ray structure analysis, optical measurements, and magnetic measurements. It was found that the drastic changes of the transfer characteristics originated from changes in the electronic structure accompanied by the molecular dynamics.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic and Molecular Conductors Research · Organic Electronics and Photovoltaics · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
JST, CREST, Chiyoda-Ku, Tokyo 102-0076, Japan
Department of Advanced Materials Science, The University of Tokyo, Chiba 277-8561, Japan
Condensed Matter Research Center (CMRC) and Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
Department of Chemistry and Research Center for Materials Science, Nagoya University, Nagoya 464-8602, Japan
Funding
Japan Society for the Promotion of Science
References (46)
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