Radio-photovoltaic cells(RPVCs)are able to offer high reliability and extended operational lifetimes,making them ideal for harsh-environment applications.However,the two-stage energy conversion process inherently limi...Radio-photovoltaic cells(RPVCs)are able to offer high reliability and extended operational lifetimes,making them ideal for harsh-environment applications.However,the two-stage energy conversion process inherently limits energy conversion efficiency(ECE).This study presents a novel RPVC design based on a waveguide light concentration(WLC)scheme,employing multilayer-stacked GAGG:Ce scintillation waveguides alternately loaded with^(90)Sr radioisotope sources.Electron beam irradiation tests revealed highly efficient radioluminescence(RL)emission from the edge surfaces of GAGG:Ce waveguide at electron energies exceeding 60 keV.A RPVC prototype incorporating 1.43 Ci of^(90)Sr achieved a maximum output power(Pmax)of 48.9μW,with an unprecedented ECE of 2.96%—the highest reported value for radioisotope-powered RPVCs to date.Furthermore,a multi-module integrated RPVC prototype demonstrated a Pmax of 3.17 mW,with a short circuit current of 2.23 mA and an open circuit voltage of 2.14 V.Remarkably,the device exhibited only 13.8%RL performance degradation after a 50-year equivalent electron beam irradiation(total fluence:5.625×10^(18)e/cm^(2)),confirming exceptional radiation hardness.These findings demonstrate that the WLC-based RPVCs achieve both high power output and exceptional long-term stability,representing a substantial advancement for facilitating nuclear battery applications.展开更多
基金supported by the National Key Research and Development Program of China(No.2022YFB1903200)the Electronic Components Project of China(No.2009ZYHN0003).
文摘Radio-photovoltaic cells(RPVCs)are able to offer high reliability and extended operational lifetimes,making them ideal for harsh-environment applications.However,the two-stage energy conversion process inherently limits energy conversion efficiency(ECE).This study presents a novel RPVC design based on a waveguide light concentration(WLC)scheme,employing multilayer-stacked GAGG:Ce scintillation waveguides alternately loaded with^(90)Sr radioisotope sources.Electron beam irradiation tests revealed highly efficient radioluminescence(RL)emission from the edge surfaces of GAGG:Ce waveguide at electron energies exceeding 60 keV.A RPVC prototype incorporating 1.43 Ci of^(90)Sr achieved a maximum output power(Pmax)of 48.9μW,with an unprecedented ECE of 2.96%—the highest reported value for radioisotope-powered RPVCs to date.Furthermore,a multi-module integrated RPVC prototype demonstrated a Pmax of 3.17 mW,with a short circuit current of 2.23 mA and an open circuit voltage of 2.14 V.Remarkably,the device exhibited only 13.8%RL performance degradation after a 50-year equivalent electron beam irradiation(total fluence:5.625×10^(18)e/cm^(2)),confirming exceptional radiation hardness.These findings demonstrate that the WLC-based RPVCs achieve both high power output and exceptional long-term stability,representing a substantial advancement for facilitating nuclear battery applications.
