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Enhancing betavoltaic nuclear battery performance with 3D P^(+)PNN^(+)multi-groove structure via carrier evolution

nuclear Science and Techniques 2023年第12期34卷 1-16页

作者： Hou‑Jun He Yun‑Cheng Han Xiao‑Yu Wang Yu‑Min Liu Jia‑Chen Zhang Lei Ren Ming‑Jie Zheng Hefei Institutes of Physical Science Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China School of nuclear Science and Engineering East China University of TechnologyNanchang 330013China School of nuclear Technology and Chemistry and Biology Hubei University of Science and TechnologyXianning 437100China

betavoltaic nuclear batteries offer a promising alternative energy source that harnesses the power of beta particles emitted by *** satisfy the power demands of microelectromechanical systems(MEMS),3D structures have been proposed as a potential ***,this paper introduces a novel 3D^(63)Ni–SiC-based P^(+)PNN^(+)structure with a multi-groove design,avoiding the need for PN junctions on the inner surface,and thus reducing leakage current and power *** Carlo simulations were performed considering the fully coupled physical model to extend the electron–hole pair generation rate to a 3D structure,enabling the efficient design and development of betavoltaic batteries with complex 3D *** a result,the proposed model produces the significantly higher maximum output power density of 19.74μW/cm^(2) and corresponding short-circuit current,open-circuit voltage,and conversion efficiency of 8.57μA/cm^(2),2.45 V,and4.58%,respectively,compared with conventional planar *** analysis of the carrier transport and collection characteristics using the COMSOL Multiphysics code,we provide deep insights regarding power increase,and elucidate the discrepancies between the ideal and simulated performances of betavoltaic *** work offers a promising approach for the design and optimization of high-output betavoltaic nuclear batteries with a unique 3D design,and serves as a valuable reference for future device fabrication.

关键词： betavoltaic nuclear battery High-output power density Three-dimensional structure Carrier drift–diffusion Carrier recombination Carrier collection efficiency

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