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There is a book The Structure of the Ottoman Dynasty Anthony Dolphin Alderson, 1956, 1982 that gives very complete and I hope accurate genealogical information about Ottoman genealogy.
Not having access to it, I tried this website:
http://web.archive.org/web/20060426191440/http://www.4dw.net/royalark/Turkey/turkey2.htm1
It merely says when the sons of Prince Halil were born.
Since Wikipedia says that Prince Halil was killed by his brother Murad in 1362, it is possible that his two sons were also killed in 1362.