Sulfur-enhanced surface passivation for hole-selective contacts in crystalline silicon solar cells

IF 7.9 2区 综合性期刊 Q1 CHEMISTRY, MULTIDISCIPLINARY
Yanhao Wang, Yirong Geng, Hongwei Hao, Wei Ren, Hai Zhang, Jingjie Li, Yongzhe Zhang, Jilei Wang, Shaojuan Bao, Hui Wang, Shan-Ting Zhang, Dongdong Li
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Abstract

Effective surface passivation is pivotal for achieving high performance in crystalline silicon (c-Si) solar cells. However, many passivation techniques in solar cells involve high temperatures and cost. Here, we report a low-cost and easy-to-implement sulfurization treatment as a surface passivation strategy. By treating p-type c-Si (p-Si) wafers with (NH4)2S solution, sulfur can be introduced onto the surface and passivate the dangling bonds by forming an Si–S bond. Sulfurization also contributes to a higher negative fixed charge at the p-Si/Al2O3 interface and, thus, better field-effect passivation. Due to the improved passivation, sulfurization effectively enhances hole selectivity, evidenced by the substantially improved open-circuit voltage and efficiency of solar cells. Eventually, by employing sulfurization in hole-selective contacts, remarkable efficiencies of 19.85% and 22.01% are attained for NiOx- and MoOx-based passivating contact c-Si solar cells, respectively. Our work highlights a promising sulfurization strategy to enhance surface passivation and hole selectivity for dopant-free c-Si solar cells.

Abstract Image

用于晶体硅太阳能电池空穴选择性触点的硫增强表面钝化技术
有效的表面钝化是晶体硅太阳能电池实现高性能的关键。然而,太阳能电池中的许多钝化技术都需要较高的温度和成本。在此,我们报告了一种低成本、易实施的硫化处理表面钝化策略。通过用 (NH4)2S 溶液处理 p 型晶体硅(p-Si)晶片,可将硫引入表面,并通过形成 Si-S 键来钝化悬空键。硫化还有助于提高 p-Si/Al2O3 界面的固定负电荷,从而提高场效应钝化效果。由于钝化得到改善,硫化可有效提高空穴选择性,太阳能电池开路电压和效率的大幅提高就是证明。最终,通过在空穴选择性接触中采用硫化技术,基于氧化镍和氧化钼的钝化接触晶体硅太阳能电池的效率分别达到了 19.85% 和 22.01%。我们的工作突出了一种很有前景的硫化策略,可提高无掺杂晶体硅太阳能电池的表面钝化和空穴选择性。
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来源期刊
Cell Reports Physical Science
Cell Reports Physical Science Energy-Energy (all)
CiteScore
11.40
自引率
2.20%
发文量
388
审稿时长
62 days
期刊介绍: Cell Reports Physical Science, a premium open-access journal from Cell Press, features high-quality, cutting-edge research spanning the physical sciences. It serves as an open forum fostering collaboration among physical scientists while championing open science principles. Published works must signify significant advancements in fundamental insight or technological applications within fields such as chemistry, physics, materials science, energy science, engineering, and related interdisciplinary studies. In addition to longer articles, the journal considers impactful short-form reports and short reviews covering recent literature in emerging fields. Continually adapting to the evolving open science landscape, the journal reviews its policies to align with community consensus and best practices.
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