Low-temperature solid-phase crystallization of a-Si1−xGex on SiO2 by ion-beam stimulation

Effects of SiSi bond-modulation on solid-phase crystallization of amorphous SiGe on SiO2 have been investigated. The results showed that the annealing temperature required to crystal nucleation significantly decreased to 400 °C by using both Ge doping and ion irradiation (25 keV, 1×1016 cm−2). In addition, preferential growth along both (111) and (220) direction was confirmed by using X-ray diffraction (XRD) method. In this way, this bond modulation method will be a powerful tool to fabricate high-quality and low-cost poly-Si thin-film transistors on glass substrates.