Patent Number: 
Section: claims

1. A solid-state high energy-density micro radioisotope power source device; said device comprising:a dielectric and radiation shielding body having an internal cavity formed therein;an ohmic contact layer comprising a conductive material disposed at a first end of the cavity, and a rectifying contact layer comprising a conductive material disposed at an opposing second end of the cavity and spaced apart from the ohmic contact layer such that a micro chamber is provided therebetween;a solid-state composite voltaic semiconductor disposed within the micro chamber between and in contact with the ohmic contact layer and the rectifying layer, the solid-state composite voltaic semiconductor comprising at least one non-radioactive semiconductor material uniformly mixed with at least one radioisotope material; anda rectifying junction formed between the rectifying contact layer and the solid-state composite voltaic semiconductor, the rectifying junction having a depletion region within the solid-state composite voltaic semiconductor that directly converts the energy of the radioisotope material uniformly mixed with the at least one non-radioactive semiconductor material to an electric field generated within the depletion region, wherein the conductive material of one of the ohmic contact layer and the rectifying layer has a high work function compared to the composite voltaic semiconductor, and the conductive material of the opposing one of the contact layer and the rectifying layer comprises a metal having a low work function compared to the composite voltaic semiconductor. 2. The device of claim 1, wherein the pre-voltaic semiconductor composition further comprises at least one dopant combined with the at least one semiconductor material with the at least one radioisotope material. 3. The device of claim 1, wherein the body having the internal cavity formed therein comprises a top portion and a bottom portion forming a ‘leak-proof’ seal between the top and bottom body portions, thereby encapsulating the solid-state composite voltaic semiconductor within the internal cavity to reduce radiation losses and increase electron hole pairing within the depletion region. 4. The device of claim 1, wherein at least one of the ohmic contact layer and the rectifying layer includes a plurality of nanostructures formed on an interface surface of the respective contact layer to increase a surface per volume ratio of the solid-state composite voltaic semiconductor to the respective contact layer, resulting in higher conversion efficiency of the solid-state high energy-density micro radioisotope power source device. 5. The device of claim 1, wherein:the ohmic contact layer is structured to include comb-like fingers extending from a base of the ohmic contact layer; andthe rectifying layer is structured to include comb-like fingers extending from a base of the rectifying layer such that the ohmic contact layer comb-like fingers are interposed with the rectifying layer comb-like fingers and a gap is provided between the interposed ohmic contact layer and rectifying layer comb-like fingers in which the solid-state composite voltaic semiconductor is disposed such that a surface per volume ratio of the solid-state composite voltaic semiconductor to the contact layer and rectifying layer is increased, resulting in higher conversion efficiency of the solid-state high energy-density micro radioisotope power source device. 6. The device of claim 1, wherein the solid-state high energy-density micro radioisotope power source device is structured and operable to provide electrical voltage at least at temperatures between 0° C. and 250° C. 7. A solid-state high energy-density micro radioisotope power source device; said device comprising:a dielectric and radiation shielding body having an internal cavity formed therein;an ohmic contact layer comprising a conductive material disposed at a first end of the cavity, and a rectifying contact layer comprising a conductive material disposed at an opposing second end of the cavity and spaced apart from the ohmic contact layer such that a micro chamber is provided therebetween;a solid-state composite voltaic semiconductor disposed within the micro chamber between and in contact with the ohmic contact layer and the rectifying layer, the solid-state composite voltaic semiconductor comprising at least one non-radioactive semiconductor material uniformly mixed with at least one radioisotope material; anda rectifying junction formed between the rectifying contact layer and the solid-state composite voltaic semiconductor, the rectifying junction having a depletion region within the solid-state composite voltaic semiconductor that converts the energy of the radioisotope material uniformly mixed with the at least one non-radioactive semiconductor material to an electric field generated within the depletion region.