Multifaceted Design of Surface Passivator for Upgraded Charge Extraction in Perovskite Solar Cells

IF 6 3区工程技术 Q2 ENERGY & FUELS

Solar RRL Pub Date : 2024-09-03 DOI:10.1002/solr.202400438

Mahdi Gassara, Samrana Kazim, Shahzada Ahmad

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Abstract

The nonradiative recombination arising from the interfaces of perovskite solar cells (PSCs) pose a hurdle, impacting both the efficiency and stability of devices. Functionalized organic molecules can passivate the perovskite surface to suppress the defects and can also fine‐tune the microstructure. This in turn promotes reliability and performance enhancement in solar cells. Using a design protocol, cyanoguanidine diiodide is synthesized and employed as a surface passivator for the fabrication of PSCs, and boosted performance from 20.44% to 23.04% is achieved. This improvement stems from an improved fill factor reaching up to 80.64%, together with the open‐circuit voltage (Voc) measuring 1119 mV. The steady‐state photoluminescence and microstructure of passivated perovskites display significant surface modification of the perovskite film which favorably impacts the charge carrier transfer at the interface of perovskite and Spiro‐OMeTAD. Our findings suggest that improved solar cell performance is due to the synergetic effect of amino and cyano functional groups along with the iodide reservoir in the organic passivator.

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从多方面设计表面钝化剂，提升过氧化物太阳能电池的电荷提取能力

包晶体太阳能电池（PSCs）界面产生的非辐射性重组是一个障碍，会影响设备的效率和稳定性。功能化有机分子可以钝化过氧化物表面，从而抑制缺陷，还可以微调微结构。这反过来又提高了太阳能电池的可靠性和性能。利用一种设计方案，合成了二碘化氰胍，并将其用作制造 PSC 的表面钝化剂，从而将性能从 20.44% 提高到 23.04%。这一改进源于填充因子的提高，达到 80.64%，开路电压（Voc）达到 1119 mV。钝化过氧化物的稳态光致发光和微观结构显示，过氧化物薄膜的表面发生了显著改性，这对过氧化物和斯派罗-OMeTAD 界面的电荷载流子转移产生了有利影响。我们的研究结果表明，有机钝化剂中的氨基和氰基官能团以及碘储层的协同效应提高了太阳能电池的性能。

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来源期刊

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.