Praise be to Allah.
Very much yes. Dua's should be made after the completion of obligatory prayers - this is masnoon and is as well considered amongst one of the time of acceptance of supplication.
Other times which are the time of acceptance of supplication (Dua'a) are:
And Allah knows the best
Dua can be made at any time of the day. But there are certain preferred time for the acceptance of Dua as answered by Mr. Tanveer.