Role of Metal Oxide Interlayers in Preventing Gold Migration in Perovskite Solar Cells

IF 6 3区 工程技术 Q2 ENERGY & FUELS
Solar RRL Pub Date : 2025-01-07 DOI:10.1002/solr.202400705
Chathuranganie A. M. Senevirathne, Jun Tae Song, Dai Semba, Takato Saito, Kentaro Imaoka, Yuki Fujita, Telugu Bhim Raju, Pangpang Wang, Sunao Yamada, Toshinori Matsushima
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引用次数: 0

Abstract

Thermal stress significantly impacts the durability of perovskite solar cells (PSCs), as evidenced by severe degradation observed at 85 °C in this study. This degradation is attributed to gold migration through the soft 2,2′,7,7′-tetrakis(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene (spiro-MeOTAD) hole transport layer (HTL) into the perovskite layer, driven by gold's low formation energy and diffusion barrier. To mitigate this issue, several vacuum-evaporable hard transition metal oxides as charge extraction interlayers between the gold electrode and the HTL to suppress gold migration are investigated. PSCs incorporating MoO3, V2O5, MoO2, and ReO3 interlayers achieve a power conversion efficiency of ≈20%, comparable to PSCs without interlayers. Notably, these interlayer-equipped PSCs exhibit enhanced thermal durability at 85 °C by effectively suppressing gold migration into the perovskite layer under elevated temperatures, with the MoO2 interlayer also improving durability at 25 °C. These findings offer a promising strategy for fabricating thermally durable PSCs, contributing to the future commercialization of photovoltaic technology.

Abstract Image

金属氧化物中间层在钙钛矿太阳能电池中阻止金迁移的作用
热应力显著影响钙钛矿太阳能电池(PSCs)的耐久性,在85°C下观察到的严重降解证明了这一点。这种降解是由于金在低地层能和扩散势垒的驱动下,通过2,2 ',7,7 ' -四烷基(N,N-二-4-甲氧基苯胺)-9,9 ' -螺芴(spiro-MeOTAD)孔洞迁移层(HTL)进入钙钛矿层。为了解决这一问题,研究了几种真空可蒸发硬过渡金属氧化物作为金电极和HTL之间的电荷萃取中间层来抑制金的迁移。含有MoO3、V2O5、MoO2和ReO3中间层的PSCs的功率转换效率约为20%,与没有中间层的PSCs相当。值得注意的是,在85°C高温下,这些夹层材料通过有效抑制金向钙钛矿层的迁移,增强了PSCs的热耐久性,而MoO2夹层材料也提高了25°C高温下的耐久性。这些发现为制造热耐用的PSCs提供了一个有希望的策略,有助于光伏技术的未来商业化。
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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.
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