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Analysis of the Charge Collection Mechanism of the Diamond Based on a Multi-physics Method

机译：基于多物理场方法的钻石电荷收集机理分析

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摘要

Diamond is one of the most important wide-band-gap semiconductors for radiation detection and electronic device upgrading, however, for the lack of effective quantitative simulation method, the generation, recombination and movement of carriers in this material are still far from fully studied. In this paper, a multi-physics method for quantitative analysis of these complicated processes in diamond is established. Furthermore, charge collection process in a diamond detector with incident protons is quantitatively studied by using this method. It can be concluded that the influence of carrier lifetime on charge collection efficiency (CCE) is saturated when the value of carrier lifetime is greater than the characteristic time for carriers to cover the diamond device. The influence of electric field on CCE is saturated when the value of electric field strength is greater than 1 MV/m. By comparison of the simulated results and the theoretical results of an ideal case, good agreements have been acquired in both saturated electric field and unsaturated electric field conditions. All these results indicate that this method is useful for quantitative simulation and further optimization design of diamond detectors and other devices.
机译：金刚石是用于辐射检测和电子设备升级的最重要的宽带隙半导体之一，但是，由于缺乏有效的定量模拟方法，该材料中载流子的产生，复合和运动还远远不够。本文建立了一种多物理场方法，对钻石中的这些复杂过程进行定量分析。此外，使用这种方法定量研究了带有质子的金刚石探测器中的电荷收集过程。可以得出结论，当载流子寿命的值大于载流子覆盖金刚石器件的特征时间时，载流子寿命对电荷收集效率（CCE）的影响就饱和了。当电场强度的值大于1 MV / m时，电场对CCE的影响就饱和了。通过比较模拟结果和理想情况下的理论结果，在饱和电场和不饱和电场条件下均取得了良好的一致性。所有这些结果表明，该方法可用于钻石探测器和其他设备的定量仿真和进一步优化设计。

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