Anil Kumar Bharwal, Romain Vollondat, Charif Tamin, Stéphane Roques, Jérémy Bartringer, Daniel Stoeffler, Céline Chevalier, Aziz Dinia, Abdelilah Slaoui, Thomas Fix
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引用次数: 0
摘要
由于其独创的光电特性和笼状结构，II型硅克拉斯（NaxSi136）薄膜被研究为一种用于能源应用的新型硅基材料。考虑到这些器件和应用，了解这些氯化物的能级至关重要，并且需要对它们进行研究，因为它们随 Na 浓度的变化而强烈变化。在这项研究中，我们测定了从 Na0.1Si136 到 Na23Si136 等多种成分的光带隙能、功函数、电离能和表面光电压。我们的研究结果表明，其半导体特性和作为太阳能电池吸收体的潜力与 Na 的浓度密切相关，几乎不含 Na 的笼子最有希望在设备上应用。
Influence of Sodium Concentration on the Optoelectronic Properties of Silicon Clathrate Films
Due to their original optoelectronic properties and cage-like structure, type-II silicon clathrate (NaxSi136) films are investigated as a new silicon-based material for energy applications. In view of the devices and applications, understanding the energy levels of these clathrates is crucial and needs to be investigated as they vary strongly with Na concentration. In this study, we determined the optical bandgap energy, work function, ionization energy, and surface photovoltage for a wide range of compositions ranging from Na0.1Si136 to Na23Si136. Our findings reveal that the semiconducting properties and potential as solar cell absorbers are dramatically dependent on the Na concentration, with nearly Na-free cages showing the most promise for device applications.
期刊介绍：
ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
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