The Influence of Excess Free Carriers as Heat Carriers on the n-Type Silicon Thermoelastic Photoacoustic Responses Explained by Electro-Acoustic Analogies

IF 2.5 4区工程技术 Q3 CHEMISTRY, PHYSICAL International Journal of Thermophysics Pub Date : 2024-07-11 DOI:10.1007/s10765-024-03406-3

D. K. Markushev, N. Branković, S. M. Aleksić, D. S. Pantić, S. P. Galović, D. D. Markushev, J. Ordonez-Miranda

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Abstract

The explanation of the n-type silicon thermoelastic photoacoustic response is given by electro-acoustic analogies, which clarify the influence of excess free carriers as heat carriers. It was found that electro-acoustic analogies could interconnect different theoretical models of heat flow and carrier dynamics aiming to find the optimal experimental conditions for the efficient free carrier influence analysis of the sample thermoelastic photoacoustic response. Theoretical analysis was based on the comparison between the composite piston, surface recombination, and RC filter frequency response models, extrapolating the behavior of the photoacoustic response much beyond the experimental frequency domain. Experimental analysis was based on the open-cell photoacoustic setup operating under the transmission configuration within the modulation frequencies range from 20 Hz to 20 kHz. The accuracy of our predictions and the validity of electro-acoustic analogies are confirmed by measuring 875 μm plasma-thick and 35 μm plasma-thin silicon samples.

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通过电声类比解释作为热载体的过剩自由载流子对 n 型硅热弹性光声响应的影响

n 型硅热弹性光声响应的解释采用了电声类比方法，该方法阐明了作为热载体的过量自由载流子的影响。研究发现，电声类比可以将不同的热流和载流子动力学理论模型相互联系起来，从而找到最佳实验条件，对样品热弹性光声响应进行有效的自由载流子影响分析。理论分析基于复合活塞、表面重组和 RC 滤波器频率响应模型之间的比较，推断出远超过实验频域的光声响应行为。实验分析基于在 20 Hz 至 20 kHz 调制频率范围内的传输配置下运行的开孔光声装置。通过测量 875 μm 等离子体厚度和 35 μm 等离子体厚度的硅样品，证实了我们预测的准确性和电声类比的有效性。

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来源期刊

International Journal of Thermophysics 物理-力学

CiteScore

4.10

自引率

9.10%

发文量

179

审稿时长

5 months

期刊介绍： International Journal of Thermophysics serves as an international medium for the publication of papers in thermophysics, assisting both generators and users of thermophysical properties data. This distinguished journal publishes both experimental and theoretical papers on thermophysical properties of matter in the liquid, gaseous, and solid states (including soft matter, biofluids, and nano- and bio-materials), on instrumentation and techniques leading to their measurement, and on computer studies of model and related systems. Studies in all ranges of temperature, pressure, wavelength, and other relevant variables are included.