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arXiv 1101.5599cond-mat.mtrl-sci
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探测X射线辐射时宽带半导体中的电荷输运动力学

Kinetics of Charge Transport in Wide-Band Semiconductors at the Detection of X-Ray Radiation

V. Ya. Degoda, A. O. Sofienko

摘要:

由于半导体中X射线量子的吸收,电子-空穴对的产生发生在小体积(直径< 0.5 mkm)中。它们的剩余能量由于在晶格的声子上的散射而损失。当施加外部电场时,载流子的空间分布使得晶体电极上的电流脉冲的形式变得复杂。本文给出了半导体中X射线电导率基本动力学模型的逻辑图,该模型采用自由载流子空间分布的时间连续计算和自由载流子在固体中运动的扩散漂移模型。对于理想半导体的情况,例如不包含深陷阱和复合中心的理想半导体,以及对于具有主要的浅陷阱或深陷阱的电子和空穴的晶体的情况,在分析类中获得外部圆中的电流脉冲的基本形式。

英文摘要:

As a result of absorption of X-ray quantum in a semiconductor, the generation of electron-hole pairs takes place in a small volume (diameter < 0.5 mkm). Their surplus energy is lost due to the scattering on phonons of the crystal lattice. Spatial distribution of the charge carriers makes the form of current pulse on electrodes of the crystal complicated when an external electric field is applied. We present a logical chart of construction of basic kinetic model of X-ray conductivity in semiconductors that uses the successive in time calculation of the spatial distribution of free charge arriers and the diffusive-drift model of motion of free carriers in a solid. The basic form of current pulse in an external circle was obtained in the analytical kind for the case of an ideal semiconductor, e.g. that does not contain deep traps and recombination centers, as well as for the case of a crystal with dominant shallow or deep traps of electrons and holes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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