X-ray determination of charge transfer in solar grade GaAs

The magnitude and direction of charge transfer in GaAs at various temperatures have been analyzed using our precise and extensive single-crystal X-ray diffraction data. The charge transfer parameters were obtained by employing a quadratic equation method and precise X-ray structure factors collected at 170, 200, 250 and 300 K. A transfer of charge from gallium atom to arsenide atom is evidenced at all the above temperatures.