Black phosphorous, the new wonder material for electronic, optoelectronic and thermoelectric devices.

Black phosphorous, named for its distinctive color, is a natural semiconductor with an energy bandgap, and highly promising material for electronic, optoelectronic and thermoelectric devices. Also called phosphorene as It belongs to class of two-dimensional crystals including graphene, boron nitride and molybdenum disulphide.

A band gap is an energy band in which no electron states can exist and is essential for creating the “on/off” flow of electrons that are needed in digital logic electronics. Black phosphorus’s bandgap range with wavelengths of 0.6 to 4.0 micrometers means it can absorb and emit light covering the visible to infrared range. Such a band structure allows its electrical conductance to be switched “on and off “and its application in field-effect transistosr (FET) and for the generation of photons for LEDs and lasers.