The role of masking and aperture size for accurate measurement of performance parameters of DSSCs

IF 6 2区 工程技术 Q2 ENERGY & FUELS
Milan Kumar Mandal , Rahul Ranjan , Surajit Ghosh , Jayanta Chakraborty
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引用次数: 0

Abstract

DSSC efficiency is often reported with very little or no consideration of the cell area for which they are reported. Area masking of cells is almost always used for the measurement of cell performance parameters (Jsc, Voc, and FF). Although edge masking is required to exclude edge effects, a variety of masking including masking a major portion of the cells are frequently used to boost the apparent efficiency of the cell. In this work, it will be shown that the reported efficiency of a cell is strongly dependent on the exposed area. Two different kinds of cells have been considered in this work to elucidate the area effect: first is a large active area cell whose performance metrics are obtained by masking various fraction of the active area. Second, cells were fabricated with active areas ranging from small to large. A comparison of these two kinds of cells demonstrates that the cells with smaller areas show area-dependent performance parameters. A cell with a 4 mm2 exposed area will show a higher efficiency of 10.47 % while the efficiency will drop to ∼ 3 % as the area increases to 60 mm2 or higher. Such area dependence can be avoided if the cell area/exposed area selected is 60 mm2 or above. The reason for the area dependence has been identified to be due to the presence of trap states and not due to scattering which is sometimes used in the literature to explain the area dependence.
掩膜和孔径大小对准确测量 DSSC 性能参数的作用
在报告 DSSC 效率时,通常很少或根本不考虑所报告的电池面积。在测量电池性能参数(Jsc、Voc 和 FF)时,几乎总是使用电池的面积掩蔽。虽然需要进行边缘掩蔽以排除边缘效应,但包括掩蔽大部分电池在内的各种掩蔽经常被用来提高电池的表观效率。在这项工作中,我们将证明电池的表观效率与暴露面积密切相关。为了阐明面积效应,本研究考虑了两种不同的电池:第一种是大有效面积电池,其性能指标是通过掩蔽不同部分的有效面积获得的。第二种是活性面积由小到大的电池。对这两种电池的比较表明,面积较小的电池的性能参数与面积有关。暴露面积为 4 平方毫米的电池效率较高,达到 10.47%,而当面积增加到 60 平方毫米或更大时,效率将下降到 3%。如果选择的电池面积/暴露面积为 60 平方毫米或以上,就可以避免这种面积依赖性。面积依赖性的原因已被确定为陷阱态的存在,而不是文献中有时用来解释面积依赖性的散射。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Solar Energy
Solar Energy 工程技术-能源与燃料
CiteScore
13.90
自引率
9.00%
发文量
0
审稿时长
47 days
期刊介绍: Solar Energy welcomes manuscripts presenting information not previously published in journals on any aspect of solar energy research, development, application, measurement or policy. The term "solar energy" in this context includes the indirect uses such as wind energy and biomass
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