Double-parameter and high-sensitivity organic small molecular semiconductor film magnetic sensor

Abstract

The invention provides a double-parameter and high-sensitivity organic small molecular semiconductor film magnetic sensor, which is an organic electroluminescence material Alq3-based organic semiconductor film device. The magnetic sensor has a laminated film structure, and the structure comprises a substrate, a conductive transparent anode ITO, an organic material functional layer and a LiF / Al cathode from the bottom to the top; the organic material functional layer consists of a hole transmission layer NPB, a sensing layer Alq3: 3 percent doping agent DCM and an electronic transmission layer Alq3; and the electroluminescence intensity of the magnetic sensor is measured by a silicon photoelectric probe and output through a digital universal meter, and the obtained signal is finally acquired by a computer through a data acquisition module. The magnetic sensor also has the advantages of the current popular MR sensor such as low power consumption, high sensitivity, small size and the like, can realize double-parameter (namely magnetic resistance and magnetic luminescence) response, and has good thermal stability at the same time; and the reliability of the sensor is greatly enhanced.

Description

Technical field [0001] The invention relates to organic semiconductor devices, and relates to the technical field of magnetic sensors. Background technique [0002] Magnetic sensors are usually used on objects with small magnets. By capturing the strength of the magnetic field and its changes, it provides a unique means for detecting the approach, movement or rotation of objects. The history of using magnetic sensors is quite long. Some traditional applications: For example, the use of gear sensors to measure the speed of gears, the application of coil-type sensors to trigger the circuit loop of traffic light signals buried in the road, and the use of Hall devices to make rotary position sensors and Current sensors, etc., due to the deficiencies of price, size, and reliability, these traditional magnetic sensors have been saturated in the market. [0003] After entering the 21st century, due to the tremendous progress made in miniaturization, the demand for fully integrated magnet...

AI Technical Summary

Problems solved by technology

Compared with traditional AMR and GMR materials, organic semiconductor materials have many advantages such as wide range of material selection, long electron spin diffusion length, easy adjustment of electronic structure, simple process required, and the ability to be made into flexible substrate devices. At present, organic semiconductor high-sensitivity magnetic sensors are being actively developed, but industrialization has not yet been realized

Images