I don’t think so. What I do when I need my phone to wake me up without disturbing me earlier and without using too much battery: I just turn it to silent and to plane mode.
I’m not a big fan of doing that. The phone doesn’t seem to charge as well while on and it decreases the overall lifetime of the device. I hope the developers do something about this.
Actually leaving the phone in airplane mode over night wastes less battery than booting down and up again once, so it should charge better in airplane mode than turned off.
Also I’m not sure rebooting is better for the phone’s lifespan than a night in standby.