The paper performs a systematic study of the impact the source of group V element has on HBT performance and reports the DC and microwave characteristics of GaInP/GaAs HBT's grown in an environment of reduced toxicity using all-metalorganic precursors like tertiarybutylphosphine (TBP), tertiarybutylarsine (TBA), triethylgallium (TEG), trimethylgallium (TMG) and trimethylindium (TMI). The suitability of Chemical Beam Epitaxy (CBE) for the growth of GaInP/GaAs HBT's using TBA and TBP as As and P sources was investigated.