by the National Natural Science Foundation of China(No 51075344);Natural Science Foundation of Fujian Province(No 2010J01015).
A high open-circuit voltage betavoltaic microbattery based on a GaN p-i-n diode is demonstrated.Under the irradiation of a 4×4 mm^(2) planar solid 63Ni source with an activity of 2 mCi,the open−circuit voltage Voc of...