All-solid-state organic electrochemical phototransistor and preparation method thereof

Abstract

The invention relates to an all-solid-state organic electrochemical phototransistor and a preparation method thereof. The organic electrochemical phototransistor adopts a bottom gate planar structure,and the device includes a substrate, a solid electrolyte layer, an active layer, a source / drain electrode and a light absorbing layer from bottom to top; the solid electrolyte layer uses a polymer ion gel electrolyte and utilizes a spin coating or knife coating process to form a solid electrolyte layer on the substrate to achieve an all-solid-state organic electrochemical phototransistor. The all-solid-state organic electrochemical phototransistor provided by the invention achieves excellent optical response R and detection rate D under low voltage operation, and the characteristics of the all-solid-state phototransistor can be further integrated into advanced electronic and circuit systems, and the application field of the high performance electrochemical transistor is expanded. The all-solid-state organic electrochemical transistor is expected to be widely used in the fields of optical sensors, artificial synapses, and large-scale integrated circuits.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, and relates to an all-solid-state organic electrochemical phototransistor and a preparation method thereof. Background technique [0002] Organic field-effect phototransistors have received extensive attention, but the improvement of their photoelectric properties mainly focuses on the optimization of active layer materials, including: n / p-type semiconductor material blending, n / p-type semiconductor material layer heterojunction, etc. . In fact, the improvement of the performance of organic field-effect phototransistors is limited by the mobility of organic semiconductor materials, and more importantly, the nature of low transconductance of field-effect transistors. At the same time, the operating voltage of most organic field-effect phototransistors is higher than 10V, which generates large power consumption and is not conducive to integration into wearable devices, whi...

AI Technical Summary

Problems solved by technology

However, at present, all electrochemical transistors use liquid electrolytes, the process is relatively complicated, and the volatile characteristics of liquid electrolytes not only cause unstable device performance, but also are difficult to integrate into existing solid-state electronic devices, which seriously affect the current state of the art. Applications of chemical transistors

At present, there is no report on the preparation of all-solid-state organic electrochemical phototransistors combined with high transconductance electrochemical transistors.

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