科研之友
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摘要
A 4H SiC betavoltaic nuclear battery is demonstrated. A Schottky barrier diode is utilized for carrier separation. Under illumination of Ni-63 source with an apparent activity of 4 mCi/cm(2), an open circuit voltage of 0.49 V and a short circuit current density of 29.44 nA/cm(2) are measured. A power conversion efficiency of 1.2% is obtained. The performance of the device is limited by low shunt resistance, backscattering and attenuation of electron energy in air and Schottky electrode. It is expected to be significantly improved by optimizing the design and processing technology of the device.
- 出版日期2008-10
- 单位西安电子科技大学; 西北工业大学; 中国原子能科学研究院
