Optical investigations on thermal conductivity in n- and p-type porous silicon

S. Lettieri; U. Bernini; E. Massera; P. Maddalena

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Optical investigations on thermal conductivity in n- and p-type porous silicon

机译：n型和p型多孔硅热导率的光学研究

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Determination of thermal conductivity of top side illuminated n-type and p-type porous silicon (PS) samples have been performed by means of photo-acoustic and optical pump-probe techniques. Concerning the n-type samples, the values found can be explained in the framework of Looyenga effective medium theory, leading to a thermal conductivity of the solid phase of 13 W/mK. This result suggests that n-type thick PS samples formed by top side illumination has a complex multilayer morphology in which mesophases, nanophases and macrophases coexist. The investigation on p-type nanoporous silicon shows that the thermal conductivity does not scale with porosity p as (1-p)~3, suggesting that the percolation of the solid phase is more pronounced respect to the case of a regular "Looyoenga-like" mesophase.

机译：已通过光声和光学泵浦探针技术确定了顶侧照明的n型和p型多孔硅（PS）样品的热导率。关于n型样品，可以在Looyenga有效介质理论的框架内解释发现的值，从而使固相的热导率达到13 W / mK。该结果表明，通过顶侧照明形成的n型厚PS样品具有复杂的多层形貌，其中中间相，纳米相和宏观相共存。对p型纳米多孔硅的研究表明，热导率不会随着孔隙率p的增加而按比例缩放（1-p）〜3，这表明固相的渗滤相对于规则的“类似Looyoenga的情况”更为明显。中间相。

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《Physica Status Solidi. C, Conferences and critical reviews》 |2005年第9期|p.3414-3418|共5页
作者
S. Lettieri; U. Bernini; E. Massera; P. Maddalena;
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作者单位

Coherentia-INFM and Dipartimento di Scienze Fisiche, Universita di Napoli 'Federico II', Complesso Universitario di M. S. Angelo, 80126 Napoli, Italy;

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正文语种 eng
中图分类固体物理学;
关键词
acoustical properties of solids; nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves; theory; models; and numerical simulation;

机译：固体的声学特性;固体中的非电子热传导和热脉冲传播;热波;理论;楷模;和数值模拟;

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Optical investigations on thermal conductivity in n- and p-type porous silicon

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