Temperature Dependent Black Phosphorus Transistor and Memory

We studied the temperature dependent transport properties and memory behaviour of ultrathin black phosphorus field-effect transistors. The devices show electrical conductance and field-effect mobility that decreases with the rising temperature. The field effect mobility, which depends also on the gate voltage sweep range, is 283 cm2V−1s−1 at 150K and reduces to 33 cm2V−1s−1 at 340 K, when the voltage gate sweep range is  50 V. The transfer characteristics show a hysteresis width that increases with the temperature and is exploited to enable non-volatile memories with a wider programming window at higher temperatures.