带有氯基中间膜的透明孔选择性氧化钼钝化触点可实现 22.5% 效率的硅太阳能电池

IF 6 3区 工程技术 Q2 ENERGY & FUELS Solar RRL Pub Date : 2024-08-01 DOI:10.1002/solr.202400392
Gabriel Bartholazzi, Mohamed M. Shehata, Christian Samundsett, Daniel H. Macdonald, Lachlan E. Black
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引用次数: 0

摘要

为了提高晶体硅太阳能电池现有钝化触点的透明度,人们开发了基于过渡金属氧化物(TMO)的透明触点。在空穴选择性材料中,氧化钼(MoOx)迄今为止取得了最大的成功。然而,尽管氧化钼具有较低的接触电阻率,但它依赖于固有的氢化非晶硅(a-Si:H(i))中间层来实现高水平的表面钝化,从而在器件级实现高开路电压,这在一定程度上违背了提高透明度的目标。在本文中,我们采用了一种基于精心设计的含氯铝合金氧化钛/二氧化钛(AlyTiOx/TiO2)叠层的替代性钝化中间层,从而报告了基于 a-Si:H 的无氧化钼触点的前所未有的性能。由此产生的 AlyTiOx/TiO2/MoOx 堆栈达到了创纪录的钝化水平,J0 值低至 16 fA cm-2,更接近已报道的基于 a-Si:H 的接触值,同时保持了较低的接触电阻率,远低于 100 mΩ cm-2。此外,与基于 a-Si:H 的触点相比,叠层的透明度更高,短路电流密度至少提高了 0.8 mA cm-2。这项工作将基于 TMO 的空穴选择性钝化触点的性能推向了新的水平,使具有全透明空穴选择性钝化触点的电池效率达到了创纪录的 22.53%。这项工作是实现低热预算、简单制造高效太阳能电池的重要基石。
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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Transparent Hole-Selective Molybdenum Oxide Passivating Contact with Chlorine-Based Interlayer Enabling 22.5% Efficient Silicon Solar Cells

The need to increase transparency in existing passivating contacts for crystalline silicon solar cells has motivated the development of transparent contacts based on transition metal oxides (TMOs). Among hole-selective materials, molybdenum oxide (MoOx) has achieved the greatest success so far. However, despite providing low contact resistivity, MoOx relies on an intrinsic hydrogenated amorphous silicon (a-Si:H(i)) interlayer to achieve high levels of surface passivation and thus high open-circuit voltage at a device level, partially defeating the objective of improved transparency. Herein, we report unprecedented performance for a-Si:H-free MoOx-based contacts by employing an alternative passivating interlayer based on a well-engineered chlorine-containing Al-alloyed titanium oxide/titanium dioxide (AlyTiOx/TiO2 )stack. The resulting AlyTiOx/TiO2/MoOx stack achieved record levels of passivation, reaching J0 values as low as 16 fA cm−2, closer to values reported for a-Si:H-based contacts, while maintaining lower contact resistivity, well below 100 mΩ cm−2. Additionally, the stack presents improved transparency compared to a-Si:H-based contacts, with gains in short-circuit current density of at least 0.8 mA cm−2. The work pushes the performance of hole-selective passivating contacts based on TMOs to new levels, enabling a record efficiency of 22.53% for cells with fully transparent hole-selective passivating contacts. This work serves as an important stepping stone toward low-thermal-budget, simple manufacturing of high-efficiency solar cells.

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来源期刊
Solar RRL
Solar RRL Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
12.10
自引率
6.30%
发文量
460
期刊介绍: Solar RRL, formerly known as Rapid Research Letters, has evolved to embrace a broader and more encompassing format. We publish Research Articles and Reviews covering all facets of solar energy conversion. This includes, but is not limited to, photovoltaics and solar cells (both established and emerging systems), as well as the development, characterization, and optimization of materials and devices. Additionally, we cover topics such as photovoltaic modules and systems, their installation and deployment, photocatalysis, solar fuels, photothermal and photoelectrochemical solar energy conversion, energy distribution, grid issues, and other relevant aspects. Join us in exploring the latest advancements in solar energy conversion research.
期刊最新文献
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