Boosting Spiro-OMeTAD Doping via Structurally Asymmetrical Nanohorns for High-Performance Carbon-Based Perovskite Solar Cells

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2025-03-04 DOI:10.1002/aenm.202405355

Yanying Shi, Guanghao Meng, Yudi Wang, Wenrui Li, Hongru Ma, Ruiting Wang, Siao Li, Zhongyuan Zhang, Ziyang Tian, Yufa Li, Linghui Zhang, Bingying Xu, Zicheng Liu, Tao Feng, Jiashuo Cheng, Lida Liu, Dequan Cao, Wenming Tian, Yantao Shi

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Abstract

The doping level of 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (Spiro-OMeTAD), a commonly used hole transport layer in perovskite solar cells (PSCs), is crucial for its electrical conductivity and the final photovoltaic performance. The routine oxygen-oxidation doping strategy falls short in achieving high-level doping due to the sparsity and random distribution of dopants within the solid Spiro-OMeTAD film. Here the use of carbon nanohorns (CNH) as a promoter to significantly enhance the doping level of Spiro-OMeTAD is reported. The unique asymmetry and polar structure of CNH not only enable effective charge transfer between CNH and Spiro-OMeTAD, also exhibit confinement effect to trap Li⁺ ions and O₂, promoting the consecutive chemical doping processes. Corresponding carbon-based PSCs achieved a power conversion efficiency of 23.24% (22.51% certified), and demonstrated exceptional long-term durability, retaining 95.3% of the initial PCE (power conversion efficiency) after 1500 h of tracking at maximum power point (MPP) under 100 mW cm⁻² illumination.

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.