1307.7643 (Yuchen Du et al.)

Molecular Doping of Multilayer MoS2 Field-effect Transistors: Reduction
in Sheet and Contact Resistances    [PDF]

Yuchen Du, Han Liu, Adam T. Neal, Mengwei Si, Peide D. Ye

For the first time, polyethyleneimine (PEI) doping on multilayer MoS2 field-effect transistors are investigated. A 2.6 times reduction in sheet resistance, and 1.2 times reduction in contact resistance have been achieved. The enhanced electrical characteristics are also reflected in a 70% improvement in ON current, and 50% improvement in extrinsic field-effect mobility. The threshold voltage also confirms a negative shift upon the molecular doping. All studies demonstrate the feasibility of PEI molecular doping in MoS2 transistors, and its potential applications in layer-structured semiconducting 2D crystals.

View original: http://arxiv.org/abs/1307.7643