Organic field effect transistor semiconductor layer P-type doping method and prepared organic field effect transistor

Abstract

The invention discloses a P-type doping method for a semiconductor layer of an organic field effect transistor and the prepared organic field effect transistor, and the method comprises the steps: dissolving 2, 3, 5, 6-tetrafluoro-7, 7 ', 8, 8'-tetracyanodimethyl p-benzoquinone (F4-TCNQ) in an orthogonal solvent of the organic semiconductor layer to serve as a P-type doping agent; the method comprises the following steps of: preparing an organic semiconductor layer film, spin-coating the organic semiconductor layer film on the spin-coated organic semiconductor layer film in an air atmosphere, and activating doping through rapid thermal annealing, so that the problems caused by jump transmission and coulomb traps in charge transport are solved, the threshold voltage is reduced, and the switch ratio is increased. For the P-type field effect transistor, the P-type doping enhances the hole transport, effectively improves the saturation current, and inhibits the electron transport, so that the power consumption is reduced when the transistor is closed. The doping method is operated based on a solution method, is simple in process and low in preparation cost, can be suitable for large-scale production, and has a very good prospect in application of flexible and portable electronic equipment.

Description

technical field [0001] The invention relates to a P-type doping method for a semiconductor layer of an organic field effect transistor, in particular to a method for channel doping a polymer transistor by a solution method in a water-oxygen atmosphere, and belongs to the field of organic transistor preparation. Background technique [0002] Invented in the 1980s, organic field-effect transistors (OFETs) have gained attention for enabling thin and flexible circuits over large areas at low processing temperatures. Today, OFETs are widely used to drive electronic ink displays, printed RFID tags, and flexible electronic devices. Organic semiconductor materials are divided into organic small molecule semiconductor materials and organic polymer semiconductor materials according to the repeatability of molecular structural units. Organic small molecule semiconductor materials are generally composed of relatively large π-π conjugated systems. Rubrene, pentacene, and hexacene are a...

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Problems solved by technology

High doping results in performance degradation, especially on-off ratio decay, compared to the parts per million (ppm) typically required for inorganics

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