Abstract
A nuclear battery consisting of a beta source,a phosphor layer and a photovoltaic device was prepared.Planar phosphor layers were synthesized through physical precipitation of ZnS:Cu,ZnS:Ag or SrAl2O4:Eu2+,Dy3+phosphors.The radioluminescence（RL）spectra were used to analyze the RL effects of the phosphor layers under beta-particle excitation.Feasibility of using the materials as intermediate absorbers in the beta batteries was studied.TheⅠ-Ⅴcharacteristics of beta RL nuclear batteries with different phosphor layers were tested using63Ni orl47Pm beta sources.The output power of zinc sulfide matrix phosphor layer was better than that of rare-earth element oxides.In addition,a thin aluminum reflective layer was vacuum-evaporated on the phosphor layers to improve the efficiency of beta RL nuclear batteries,and the results were discussed.
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