Effect of americium-241 source activity on total conversion efficiency of diamond alpha-voltaic battery
Effect of americium-241 source activity on total conversion efficiency of diamond alpha-voltaic battery
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镅241源活性对金刚石α-伏特电池总转换效率的影响
DOI：
10.1002/er.4674
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发表时间：
2019
影响因子：
4.6
通讯作者：
Dai Bing
中科院分区：
文献类型：
--
作者：
Liu Benjian;Liu Kang;Ralchenko Victor;Dzmitrovich Dzmitry;Yang Lei;Yang Yanan;Zhang Xinyu;Su Zhenhua;Zhao Jiwen;Shu Guoyang;Gao Ge;Yao Kaili;Bi Minghao;Zhang Sen;Xue Jingjing;Wang Weihua;Han Jiecai;Zhu Jiaqi;Dai Bing
在IIb型掺硼金刚石衬底上外延生长了高质量的金刚石本征层。外延层的质量通过拉曼光谱和交叉偏振图像进行评估，并与其他样品进行比较。分析了二极管的暗电流，显示整流比高达2 × 109 at ±7 V。研究了不同镅-241放射性源辐照下转换器的电流-电压特性。在源活度为8.85 μCi/cm 2的镅-241源的照射下，金刚石α伏打电池的最大总转换效率（ηtotal）为1.41%，短路电流（Isc）为6.68 nA/cm 2，开路电压（Voc）为1.06 V。电池参数随镅-241源活度增加的趋势得到了澄清。参数I和V随放射源活度的增加而增加。η total随源活度的增大而增大，随填充因子的增大在一定活度区间内波动，然后随放射性源活度的增大而减小。研究结果对核电池的设计具有重要意义。
High‐quality diamond intrinsic layer was epitaxially grown on a IIb‐type boron‐doped diamond substrate. The quality of the epitaxy layer was evaluated by Raman spectroscopy and cross‐polarizer images and compared with other samples. The dark current of the diode was analyzed, revealing a rectification ratio as high as 2 × 109at ±7 V. Current‐voltage characteristics of the converter under the irradiation of different americium‐241 activity sources were investigated. A maximum total conversion efficiency (ηtotal) of 1.41%, short‐circuit current (Isc) of 6.68 nA/cm2, and open‐circuit voltage (Voc) of 1.06 V from the diamond alpha‐voltaic battery were obtained under the irradiation of an americium‐241 source with a source activity of 8.85 μCi/cm2. The trend for the battery parameters with the increase in the activity of the americium‐241 source was clarified. ParametersIscandVocincrease with the increase in the radioactive source activity. Theηtotalincreases with the increase in the source activity but fluctuates in a certain activity interval with an increase in the fill factor, and then decreases with the increase in radioactive source activity. The research results are significant for the design of nuclear batteries.