A low-pressure metalorganic chemical vapor deposition of CuAlSe2 epita
xial films was performed using several kinds of metalorganic precursor
s. The film quality varied remarkably depending on the source precurso
rs. Free exciton emission at 2.739 eV was observed in the CuAlSe2 film
s grown using triisobutylaluminium and diethylselenium, both of which
have lower decomposition temperatures.