Carbon doping in InAlAs material grown with LP-MOVPE has been studied. Carb
on tetrabromide (CBr4) has been used as a source of carbon. We investigated
the influence of the growth parameter on the carbon incorporation. Carbon
concentrations as high as 3 x 10(19) cm(-3) were achieved at the low temper
ature of 530 degreesC and the low V/III ratio of 20. Post-thermal annealing
was required to activate carbon atoms. Hole concentrations as high as 1.8
x 10(19) cm(-3) have been obtained. (C) 2000 Elsevier Science B.V. All righ
ts reserved.