Optimized Graphene-Oxide-Based Interconnecting Layer in All-Perovskite Tandem Solar Cells

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-01-09 DOI:10.1021/acsenergylett.4c03065

Melissa R. Fitzsimmons, Bart Roose, Yutong Han, Taeheon Kang, Yu-Hsien Chiang, Chieh-Szu Huang, Yang Lu, Terry Chien-Jen Yang, Cullen Chosy, Shaoliang Guan, Miguel Anaya, Samuel D. Stranks

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Abstract

All-perovskite tandem solar cells represent a significant advancement in next-generation photovoltaics toward higher power conversion efficiencies than single junction cells. A critical component of a monolithic tandem solar cell is the interconnecting layer, which facilitates the integration of the wide bandgap and low bandgap subcells. Conventional designs in all-perovskite tandem cells are based on an ultrathin metal recombination layer, typically Au, alongside a poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) hole transporting layer, which introduce optical and recombination losses, and instabilities. Here, we present a new interconnecting layer based on a graphene-oxide recombination layer, which facilitates the replacement of PEDOT:PSS with the preferred self-assembled monolayer [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz). This device architecture results in significantly reduced optical and nonradiative losses, leading to champion device efficiency of 23.4% compared to 19.7% with the conventional layers, along with improvements in stability. This work solves a critical challenge in all-perovskite tandem cell device design.

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全钙钛矿串联太阳能电池中基于氧化石墨烯的优化互连层

全钙钛矿串联太阳能电池代表了下一代光伏电池的重大进步，比单结电池具有更高的功率转换效率。互连层是单片串联太阳能电池的关键组成部分，它有利于宽带隙和低带隙子电池的集成。全钙钛矿串联电池的传统设计是基于超薄金属复合层，通常是金，以及聚（3,4-乙烯二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）空穴传输层，这会带来光学和复合损失，以及不稳定性。在这里，我们提出了一种新的基于石墨烯-氧化物复合层的互连层，它有助于用优选的自组装单层[2-（9h -咔唑-9-基）乙基]膦酸（2PACz）取代PEDOT:PSS。这种器件结构显著降低了光学和非辐射损耗，使冠军器件的效率达到23.4%，而传统层的效率为19.7%，同时稳定性也有所提高。这项工作解决了全钙钛矿串联电池装置设计中的一个关键挑战。

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.