How do I charge a 3.7V battery from a 1V source?

I am trying to charge a 3.7V Battery using a small solar cell, which has an output of 1V and 2uA due to the operating conditions. I figure i might need a diode, some capacitors and a switching circuit, but I really don't know
Update: Any ideas on how to store the energy are also very welcome. I need enough energy to power a regular LED for a while
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