Wenli Guo, Hua Chen, Anneng Yang, Xin Li and Yu Wang
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引用次数: 0
摘要
经济型转换器是热光电技术工业应用的关键组成部分。本研究展示了用于宽带热光电能量转换的 GaSb 薄膜电池。结果表明,n-on-p 结构是薄膜电池的上佳选择,因为它的可获得效率更高。在非定形黑体光谱的照射下,GaSb 薄膜电池的匹配光谱温度应在 2000~2600 K 之间。在这些匹配光谱下,最佳 GaSb 薄膜的效率可达 8% 左右,VOC = 0.55 V,FF = 0.64,JSC = 44 A cm-2,从而显示出高达 15 W cm-2 的功率密度输出,而有源层厚度仅为 4.5 μm 左右。这些结果在 SF 不超过 104 cm s-1 时得到了很好的保留。随着光谱温度的升高,我们还建立了一个现象学模型,用于分析预测特定光谱照明下的最佳电池结构。因此,这项工作为开发用于经济热光电能量转换的 GaSb 薄膜电池或子电池确立了基本准则。
Performance evaluation of thin film GaSb thermophotovoltaic cells
Economical converters are the key component for the industrial applications of thermophotovoltaic technology. In this work thin film GaSb cells are demonstrated for broadband thermophotovoltaic energy conversion. It is shown that n-on-p configuration is a superior choice for thin film cell due to its larger accessible efficiency. Under the illumination of unshaped blackbody spectrum, the matched spectrum temperature for GaSb thin film cells should be in the range of 2000∼2600 K, With those matched spectra, the optimal GaSb thin film can achieve the efficiency up to 8% or so with VOC = 0.55 V, FF = 0.64, JSC = 44 A cm−2, thus showing the power density output up to 15 W cm−2 while only having the active layer thickness 4.5 μm or so. These results are well preserved for SF no more than 104 cm s−1. With increasing spectrum temperature, a phenomenological model has also been formulated to analytically predict the optimal cell structure at a given spectrum illumination. This work has thus established the fundamental guidelines to develop GaSb thin film cells or subcells for economical thermophotovoltaic energy conversion.
期刊介绍:
Physica Scripta is an international journal for original research in any branch of experimental and theoretical physics. Articles will be considered in any of the following topics, and interdisciplinary topics involving physics are also welcomed:
-Atomic, molecular and optical physics-
Plasma physics-
Condensed matter physics-
Mathematical physics-
Astrophysics-
High energy physics-
Nuclear physics-
Nonlinear physics.
The journal aims to increase the visibility and accessibility of research to the wider physical sciences community. Articles on topics of broad interest are encouraged and submissions in more specialist fields should endeavour to include reference to the wider context of their research in the introduction.