Nanoparticle floating-gate transistor memory based on solution-processed ambipolar organic semiconductor

Organic thin-film transistor memory based on nano-floating-gate nonvolatile memory was demonstrated by a simple method. The gold nanoparticle that fabricated by thermally evaporated acted as the floating gate. Spin coated PMMA film acted as the tunneling layer. A solution-processed ambipolar semiconductor acted as the active layer. Because of the existence of both hole and electron carriers in bipolar semiconductor materials, it is more conducive to the editing and erasing of memories under positive and negative pressure. The memory based on metal nanoparticles and organic bipolar semiconductor shows good read-write function.

THERMOELECTRIC PROCESSES IN AN EFFICIENT LIGHT-EMITTING TRANSISTOR

Objectives Development of energy-efficient light-emitting bipolar semiconductor structures.Method A method for transforming thermoelectric heat in bipolar semiconductor structures into optical-range electromagnetic radiation, which preserves the cooling effect on thermoelectric transitions, is proposed. Instead of transferring the information impulse electrically from the baseemitter light-emitting transition, the information is transferred directly to the light-absorbing basecollector transition by photons or following multiple re-reflections from mirror metal electrodes.Results Unlike conventional optocouplers discretely separated in space, the novel optocouplers described in the article are integrated into a single electronic component using the principle of LED radiation. As a result, light-emitting bipolar semiconductor structures will result in the creation of more powerful, faster and better integrated devices.Conclusion Light-emitting bipolar semiconductor structures will not only increase the reliability of electronic components across a wide range of performance characteristics, but also increase energy efficiency through the use of optical radiation recovery. The future development of light-efficient transistors improves integration and increases processor performance, at the same time as reducing the power consumption of the cooling system and the power supply of the device itself.

Controlling of Differential Resistance of p–n-Junctions of Bipolar Transistor in Active Mode by Method of Impedance Spectroscopy

Controlling of parameters of manufactured transistors and interoperational controlling during their production are necessary conditions for production of competitive products of electronic industry. Traditionally for controlling of bipolar transistors the direct current measurements and registration of capacity-voltage characteristics are used. Carrying out measurements on alternating current in a wide interval of frequencies (20 Hz–30 MHz) will allow to obtain additional information on parameters of bipolar transistors. The purpose of the work is to show the possibilities of the method of impedance spectroscopy for controlling of differential resistance of p–n-junctions of the bipolar p–n–p-transistor in active mode.The KT814G p–n–p-transistor manufactured by JSC “INTEGRAL” was studied by the method of impedance spectroscopy. The values of differential electrical resistance and capacitance for base–emitter and base–collector p–n-junctions are defi at direct currents in base from 0.8 to 46 µA.The results of the work can be applied to elaboration of techniques of fi checking of discrete bipolar semiconductor devices.