Yixiang Yu, Gang Xu, Tao Zhang, Zehang Liu, Yuzhou Wu, Xinquan Wang, Qingquan He
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Benzylhydrazinium Chloride Interface Engineering Boosts Performance of Wide-Bandgap Perovskite and Tandem Solar Cells
Wide-bandgap (WBG) perovskites have gained great attention as promising top-cell absorbers with the potential of enabling efficient perovskite/crystal silicon tandem solar cells (TSCs). However, defects generated during the deposition of perovskite substantially degrade device performance and operational stability. Here, we demonstrate an interfacial engineering strategy for efficient defect passivation of Cs0.05(FA0.77MA0.23)0.95Pb(I0.77Br0.23)3 WBG perovskite (1.68 eV) films based on small organic molecule, benzylhydrazine monohydrochloride (BHC). The BHC, incorporating both primary amine (–NH2) and protonated ammonium (–NH3+) functional groups, enables bifunctional synergistic passivation of undercoordinated Pb2+ and cation vacancies on perovskite surface. This strategy boosts the power conversion efficiency (PCE) of WBG perovskite solar cells from 19.01% to 20.87%, with simultaneous improvements in all photovoltaic parameters including open-circuit voltage, short-circuit current density, and fill factor. Unencapsulated devices retain 80% of initial PCE after 960 h storage under ambient conditions. When integrated into perovskite/silicon TSCs, a PCE of 29.56% is achieved.
Solar RRLPhysics 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.