Radioisotope microbattery based on liquid semiconductor

Wacharasindhu, T.; Kwon, J. W.; Meier, D. E.; Robertson, J. D.
July 2009
Applied Physics Letters;7/6/2009, Vol. 95 Issue 1, p014103
Academic Journal
A liquid semiconductor-based radioisotope micropower source has been pioneerly developed. The semiconductor property of selenium was utilized along with a 166 MBq radioactive source of 35S as elemental sulfur. Using a liquid semiconductor-based Schottky diode, electrical power was distinctively generated from the radioactive source. Energetic beta radiations in the liquid semiconductor can produce numerous electron hole pairs and create a potential drop. The measured power from the microbattery is 16.2 nW with an open-circuit voltage of 899 mV and a short-circuit of 107.4 nA.


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