Abstract This paper presents a new beta converter cell based on reduced graphene oxide (rGO)/Si heterojunction suitable for betavoltaic batteries. The potential barrier created in the rGO/Si interface induces an internal electric field in the Si substrate. This internal electric field can be used for separating the beta-generated electron-hole pairs in Si. Ni63, with the activity of 5mci is used as the beta radioisotope source. The current-voltage characteristic of the cell is measured with and without radioisotope radiations. The circuit model of the junction is also presented. The cell shows an open circuit voltage of 34 mV, a short circuit current of 0.41 μA/cm2, and high conversion efficiency of 3.9% under exposure of beta radioisotope Ni63. The presented structure, additionally, benefits from the capability of graphene in the absorption of beta particles and carrier separation via ununiformed finger shape of front electrodes.

中文翻译：

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基于还原氧化石墨烯/硅异质结的 Betavolta 电池

摘要 本文提出了一种基于还原氧化石墨烯 (rGO)/Si 异质结的新型 Beta 转换器电池，适用于 Betavoltaic 电池。在 rGO/Si 界面中产生的势垒会在 Si 衬底中感应出内部电场。该内部电场可用于分离 Si 中 β 生成的电子-空穴对。活性为 5mci 的 Ni63 用作 β 放射性同位素源。在有和没有放射性同位素辐射的情况下测量电池的电流-电压特性。还介绍了结的电路模型。该电池在β放射性同位素Ni63暴露下开路电压为34 mV，短路电流为0.41 μA/cm2，转换效率高达3.9%。所提出的结构，另外，