Cu(in, Ga)Se2太阳能电池中晶界碱元素的同步加速器x射线表征

B. West, M. Stuckelberger, H. Guthrey, Lei Chen, B. Lai, J. Maser, V. Rose, J. Dynes, W. Shafarman, M. Al‐Jassim, M. Bertoni
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引用次数: 6

摘要

众所周知,在Cu(In, Ga)Se2 (CIGS)生长过程中和生长后添加Na和K等碱元素对块体材料的电子性能有有益的影响,器件性能显著提高。虽然器件级效应已经被测量和报道,但对Na的局部化(包括其化学性质)的直接观察是缺失的,并且Na对CIGS生长过程中元素和相分离的影响还没有完全了解。我们研究这些方面,以揭示Na在CIGS太阳能电池中的作用,最终目标是提高其转换效率。利用一套基于同步加速器的x射线表征技术,我们讨论了这些技术在研究CIGS主要成分的偏析、Na的分布、Na的化学键和CIGS的收集效率及其相关性方面的挑战和优势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synchrotron x-ray characterization of alkali elements at grain boundaries in Cu(In, Ga)Se2 solar cells
It is well known that the addition of alkali elements such as Na and K during and after growth of Cu(In, Ga)Se2 (CIGS) has beneficial effects on the electronic properties of bulk material, improving device performance significantly. While the device level effects have been measured and reported, a direct observations of the localization of Na including its chemical nature are missing, and the impact of Na on elemental and phase segregation during CIGS growth is not fully understood. We investigate these aspects to shine light on the role of Na in CIGS solar cells with the ultimate goal of increasing their conversion efficiency. Utilizing a suite of synchrotron based x-ray characterization techniques, we discuss the challenges and advantages of these techniques for investigating segregation of main constituents of CIGS, Na distribution, chemical bonding of Na, and collection efficiency in CIGS as well as their correlations.
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