I and many other developers that I know have so many ideas on our own that you will need to provide more information if you want to get anyone interested. Assuming that you are looking for developers in this case.
I rather work on my own ideas than spend my time working on someone's else. If you can't pay a decent salary and your idea is not already proven it's a too big risk for me to spend time working on something that can easily end up failing and never make any money.