Low-temperature properties and phototransport in silicon-on-insulator films synthesized by oxygen implantation

Abstract
Silicon-on-insulator material formed by oxygen implantation (SIMOX) is analyzed by comparing conductivity and Hall-effect measurements performed at low temperature, under darkness, illumination, and substrate biasing. The quality of SIMOX films annealed at high temperatures above 1300 °C is found to be greatly enhanced in comparison with that obtained after conventional annealing at 1150–1200 °C. The analysis is fulfilled by discussing the carrier mobility and lifetime behavior, impurity ionization, doping compensation, film contamination, and scattering mechanisms. Hopping conduction is found to prevail below 60 K.