期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 36, 页码 20597-20603出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta06035a
关键词
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资金
- National Natural Science Foundation of China [U1632151]
- Jiangsu Key Laboratory for Carbon-Based Functional Materials Devices [KJS1802]
- Key Research and Development Project of Anhui Province of China [1704a0902023]
- Energy Materials and Surface Sciences Unit of the Okinawa Institute of Science and Technology Graduate University
- OIST R&D Cluster Research Program
- OIST Proof of Concept (POC) Program
MXenes have been demonstrated as a potential candidate in the field of photovoltaics and energy storage owing to their high transmittance, metallic conductivity and tunable work function. In this work, we introduce a two-dimensional (2D) structure of Ti3C2-MXene nanosheets into all inorganic CsPbBr3 solar cells as an interlayer to realize a better interfacial energy level alignment, which helps to eliminate the energy level mismatch, accelerate the hole extraction and reduce the recombination at the interface of perovskite/carbon electrode. In addition, the functional groups such as] O existing in the surface of Ti3C2-MXene nanosheets also provide strong interactions between the MXene and under-coordinated Pb atoms, which remarkably reduces the deep trap defects in the CsPbBr3 films. The devicewith the Ti3C2-MXene interlayer shows an impressive initial power conversion efficiency of 9.01% and long-term stability for over 1900 hours in a moisture environment and more than 600 hours under thermal conditions.
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