Improvement of Laser Contact Opening in Bifacial PERC Solar Cells by Optimizing the Dashed Pattern

IF 2.5 3区工程技术 Q3 ENERGY & FUELS

IEEE Journal of Photovoltaics Pub Date : 2024-06-28 DOI:10.1109/JPHOTOV.2024.3416445

Junhu Cui;Dichun Yuan;Jianming Ding;Chonggui Zhong

引用次数: 0

Abstract

The laser contact opening in passivated emitter and rear cell (PERC) is essential for establishing contact between silicon and aluminum. On bifacial PERC solar cells, dashed patterns are commonly employed as an alternative to continuous openings to mitigate excessive losses associated with passivation film removal. In this work, we investigate the optimization of dashed patterns in detail. First, under the condition of the same 50% opening ratio, the optimal total length of segments is determined to be 1.2 mm. Subsequently, testing various opening ratio patterns on wafers with different resistivities reveals that low-resistivity wafers are better suited for low opening ratio patterns. Finally, simulation analyses using Quokka2 software assess the variations in power loss associated with different opening patterns, the simulation results align with those of experiments. This work provides a guidance for the rear-side laser opening pattern design of bifacial PERC solar cells.

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通过优化虚线图案改善双面 PERC 太阳能电池中的激光接触开口度

钝化发射极和后部电池（PERC）中的激光接触开口对于建立硅和铝之间的接触至关重要。在双面 PERC 太阳能电池上，通常采用虚线图案来替代连续开口，以减少因去除钝化膜而产生的过多损耗。在这项工作中，我们详细研究了虚线图案的优化问题。首先，在相同的 50%开口率条件下，确定了最佳的分段总长度为 1.2 毫米。随后，在不同电阻率的晶片上测试各种开口率图案，结果表明低电阻率晶片更适合低开口率图案。最后，使用 Quokka2 软件进行的模拟分析评估了与不同开口模式相关的功率损耗变化，模拟结果与实验结果一致。这项工作为双面 PERC 太阳能电池的后侧激光开口模式设计提供了指导。

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

IEEE Journal of Photovoltaics ENERGY & FUELS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.00

自引率

10.00%

发文量

206

期刊介绍： The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist. The scope of the IEEE J. Photovoltaics incorporates: fundamentals and new concepts of PV conversion, including those based on nanostructured materials, low-dimensional physics, multiple charge generation, up/down converters, thermophotovoltaics, hot-carrier effects, plasmonics, metamorphic materials, luminescent concentrators, and rectennas; Si-based PV, including new cell designs, crystalline and non-crystalline Si, passivation, characterization and Si crystal growth; polycrystalline, amorphous and crystalline thin-film solar cell materials, including PV structures and solar cells based on II-VI, chalcopyrite, Si and other thin film absorbers; III-V PV materials, heterostructures, multijunction devices and concentrator PV; optics for light trapping, reflection control and concentration; organic PV including polymer, hybrid and dye sensitized solar cells; space PV including cell materials and PV devices, defects and reliability, environmental effects and protective materials; PV modeling and characterization methods; and other aspects of PV, including modules, power conditioning, inverters, balance-of-systems components, monitoring, analyses and simulations, and supporting PV module standards and measurements. Tutorial and review papers on these subjects are also published and occasionally special issues are published to treat particular areas in more depth and breadth.

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