Study On Photoelectric,Thermoelectric,Mechanical And Electrical Properties Of SnS And NaV₂O₅ Micro/Nanorods

Recently more and more domestic and foreign scientists show great interest in new photodetectors, sensors and memory devices made of one dimensional?1D? materials which offer more benefits compared with many traditional electronic devices because of their fast response speed, small size, low power consumption, light weight, large storage capacity. Particularly, 1D materials have display excellent behavior in photoelectric, thermoelectric, strain properties with their shapes looking like wires of micro word which limit the electron moving in one direction. As an important ?-? compound, tin sulfide?SnS? which has been widely used in the field of photodetectors and solar cells. At same time, sodium vanadate also attracts a lot of attention in the field of energy and biological as new functional materials.In this paper, SnS and Sodium vanadate micro/nano rod has been used as research materials. The photoconductive, self-energized photoelectric detection performance of SnS are studied and at the same time the thermal characteristic and piezoresistive effect of Sodium vanadate are researched in order to develop new thermal sensors and electric switch.SnS micro/nanorods are synthesized through simple solvothermal method in one step and sodium vanadate micro/nanorods are synthesized by hydrothermal method. The morphologies and structures of both materials are characterized by XRD, SEM, TEM, EDS. Both show a prismatic on morphology with their size in micro/nano level range.1D photodetecors are made using single SnS micro/nanorod with the structure of Ag/SnS/Ag. The photoconductive performance of the device is tested and strong photoelectric response in near infrared wave of the device is found from the light response spectrum of different wavelengths. At same time, high performance self-energized photodector is obtained by annealing which can regulate the barrier height on both ends of the device. The device has the advantage of quick and sensitive response and self-energized.1D thermoelectric devices are made using single sodium vanadate with the structure of Ag/ NaV₂O₅/Ag. The thermal property of the device is measured. The results show that the devices have excellent thermal response characteristics and stable performance at the temperature ranging from 30 oC to 250 oC. The static and dynamic strain are applied to the encapsulated devices in order to measure their piezoresistive effect and the results show that the resistance of the device decreases when a compressive strain is applied, and however the resistance of the device increases when a tensile strain is applied.