高性能Sn-Pb钙钛矿太阳能电池的增强埋藏界面行为

IF 13.1 1区化学 Q1 Energy

Journal of Energy Chemistry Pub Date : 2025-04-30 DOI:10.1016/j.jechem.2025.04.052

Peng Jiang , Qinfei Gao , Jingwei Zhu , Jiayu You , Junyu Qu , Wenbo Jiao , Shenghan Wu , Yuliang Xu , Yuan Xu , Wenwu Wang , Shengqiang Ren , Herui Xi , Canglang Yao , Chuanxiao Xiao , Cong Chen , Dewei Zhao

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引用次数: 0

摘要

聚（3,4-乙烯二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）的吸湿性和酸性限制了锡铅（Sn-Pb）钙钛矿太阳能电池（PSCs）性能的提高，导致锡铅钙钛矿薄膜埋藏界面上的大量缺陷和锡铅钙钛矿的氧化降解加剧。为了解决这些问题，我们在PEDOT:PSS/钙钛矿界面上使用了1-乙基-3-胍基硫脲盐酸盐（EGH）作为多功能改性剂来调节Sn-Pb PSCs的隐埋界面行为。EGH不仅可以钝化钙钛矿埋埋界面的缺陷，调节PEDOT:PSS的功函数，使界面能级更加匹配，而且可以防止钙钛矿膜被酸性PEDOT:PSS侵蚀破坏，使PEDOT:PSS/钙钛矿界面更加稳定。此外，通过明显抑制界面非辐射复合损失，显著改善了界面电荷输运动力学。因此，egh定制的1.25 eV Sn-Pb PSCs的PCE为23.20%，具有较好的长期稳定性。

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Enhanced buried interface behaviors for high-performance Sn-Pb perovskite solar cells

Numerous defects at the buried interface of perovskite film and the exacerbated oxidation and degradation of tin-lead (Sn-Pb) perovskites induced by poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), due to its hygroscopic and acidic nature, limit performance improvement of Sn-Pb perovskite solar cells (PSCs). To address these issues, 1-Ethyl-3-Guanidinothiourea-Hydrochloride (EGH) was employed as a multifunctional modifier at the PEDOT:PSS/perovskite interface to regulate the buried interface behaviors of Sn-Pb PSCs. EGH can not only passivate the defects of the perovskite buried interface and regulate the work function of PEDOT:PSS for a more matched interface energy level, but also prevent the perovskite film from erosion damage by the acidic PEDOT:PSS for a more stable PEDOT:PSS/perovskite interface. Moreover, the interfacial charge transport dynamics were significantly improved by obviously suppressing interfacial non-radiative recombination losses. As a consequence, EGH-tailored 1.25 eV Sn-Pb PSCs yielded a champion PCE of 23.20%, featuring enhanced long-term stability.

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来源期刊

Journal of Energy Chemistry CHEMISTRY, APPLIED-CHEMISTRY, PHYSICAL

CiteScore

19.10

自引率

8.40%

发文量

3631

审稿时长

15 days

期刊介绍： The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies. This journal focuses on original research papers covering various topics within energy chemistry worldwide, including: Optimized utilization of fossil energy Hydrogen energy Conversion and storage of electrochemical energy Capture, storage, and chemical conversion of carbon dioxide Materials and nanotechnologies for energy conversion and storage Chemistry in biomass conversion Chemistry in the utilization of solar energy