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Mediating the Local Oxygen‑Bridge Interactions of Oxysalt/Perovskite Interface for Defect Passivation of Perovskite Photovoltaics

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Nano-Micro Letters 2021年第11期13卷 266-279页

作者： Ze Qing Lin Hui Jun Lian Bing Ge Ziren Zhou Haiyang Yuan Yu Hou Shuang Yang Hua Gui Yang Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China

Passivation,as a classical surface treatment technique,has been widely accepted in start-of-the-art perovskite solar cells(PSCs)that can effectively modulate the electronic and chemical property of defective perovskite *** discovery of inorganic passivation compounds,such as oxysalts,has largely advanced the efficiency and lifetime of PSCs on account of its favorable electrical property and remarkable inherent stability,but a lack of deep understanding of how its local configuration affects the passivation effectiveness is a huge impediment for future interfacial molecular ***,we demonstrate the central-atom-dependent-passivation of oxysalt on perovskite surface,in which the central atoms of oxyacid anions dominate the interfacial oxygen-bridge *** revealed that the balance of local interactions between the central atoms of oxyacid anions(e.g.,N,C,S,P,Si)and the metal cations on perovskite surface(e.g.,Pb)generally determines the bond formation at oxysalt/perovskite interface,which can be understood by the bond order conservation *** with less electronegative Si central atoms provides strong O-Pb motif and improved passivation effect,delivering a champion efficiency of 17.26%for CsPbI2Br solar *** strategy is also universally effective in improving the device performance of several commonly used perovskite compositions.

关键词： Solar cell Lead halide perovskite Passivation Oxysalt central atom

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New Hardy Spaces Associated with Some Anisotropic Herz Spaces and Their Applications

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Acta Mathematica Sinica,English Series 2008年第9期24卷 1449-1470页

作者： Yong Ding Sen Hua Lan Shan Zhen Lu School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics and Complex Systems (BNU) Ministry of Education Beijing 100875 P. R. China Department of Mathematics Lishui University Lishui 323000 P. R. China

In this paper, a class of anisotropic Herz-type Hardy spaces associated with a non-isotropic dilation on ℝ n are introduced, and the central atomic and molecular decomposition characterizations of those spaces are established. As some applications of the decomposition theory, the authors study the interpolation problem and the boundedness of the central δ-Calderón-Zygmund operators on the anisotropic Herz-type Hardy spaces.

关键词： anisotropic Hardy space anisotropic Herz-type Hardy space central atom central molecule δ -Calderón-Zygmund operator

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