Habit control during growth on GaN point seed crystals by Na-flux method

The formation of the pyramidal habit is one of the requirements for the dramatic reduction of dislocations during growth on a tiny GaN seed called a "point seed . In this study, we focus on controlling the growth habit to form a pyramidal shape in order to reduce the number of dislocations in the c-growth sector during growth on GaN point seeds. High temperature growth was found to change the growth habit from the truncated pyramidal shape to the pyramidal shape. As a result, the number of dislocations in the c-growth sector tended to decrease with increasing growth temperature.