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第四届新型太阳能电池学术研讨会

作者： Liang Li Zonghao Liu Huanping Zhou Department of Materials Science and Engineering Peking University

Organic–inorganic hybrid perovskites have taken the center stage in the solar cell field, with power conversion efficiencies(PCE) values exceeding 22%.It has always been an essential issue to achieve a delicate control of perovskite materials growth, and thus the resulted device ***, starting from precursor chemistry, we thoroughly studied the coordination effect and intercalation reaction during hybrids perovskite *** successfully synthesized high quality perovskite thin film by controlling the nucleation/growth rate and chemical *** example is that by introducing weak coordination additive or base environment in the precursor, the corresponding perovskite film shows extraordinary large grain size, crystallinity, and carrier lifetime, leading to an enhanced efficiency of 0 % under low ***, the generality of the proposed film growth mechanism have been confirmed in the perovskite materials system by using additives of various coordination abilities, which further enriches the details in the full picture of hybrids perovskite film growth.

关键词： perovskite precursor chemistry intrinsic defects film formation performance

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Hot-Casting Large-Grain Perovskite Film for Efficient Solar Cells:Film Formation and Device Performance

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Nano-Micro Letters 2020年第11期12卷 187-208页

作者： Kejun Liao Chengbo Li Lisha Xie Yuan Yuan Shurong Wang Zhiyuan Cao Liming Ding Feng Hao School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China

Organic-inorganic metal halide perovskite solar cells(PSCs) have recently been considered as one of the most competitive contenders to commercial silicon solar cells in the photovoltaic *** deposition process of a perovskite film is one of the most critical factors affecting the quality of the film formation and the photovoltaic performance.A hot-casting technique has been widely implemented to deposit high-quality perovskite films with large grain size,uniform thickness,and preferred crystalline *** this review,we first review the classical nucleation and crystal growth theory and discuss those factors affecting the hot-casted perovskite film ***,the effects of the deposition parameters such as temperature,thermal annealing,precursor chemistry,and atmosphere on the preparation of high-quality perovskite films and high-efficiency PSC devices are comprehensively *** excellent stability of hot-casted perovskite films and integration with scalable deposition technology are conducive to the commercialization of ***,some open questions and future perspectives on the maturity of this technology toward the upscaling deposition of perovskite film for related optoelectronic devices are presented.

关键词： Perovskite film Hot-casting Temperature precursor chemistry Grain size

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Synthesis and Characterization of Fluoro- and Chloro-bimetallic Alkoxides as precursors for Luminescent Metal Oxide Materials via Sol-Gel Technique

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Chinese Journal of chemistry 2007年第7期25卷 998-1004页

作者： ATHAR.Taimur SEOK, Sang II KWON, Jeong Oh Indian Institute of Chemical Technology Uppal Road Tarnaka Hyderabad (A.P.) 500007 India Advanced Materials Division Korea Research Institute of Chemical Technology 100 Jang-Dong Yuseong-Gu Daejon 305-343 Korea

Heterobimetallic alkoxides are broadly recognized as versatile precursors for luminescence materials, and efforts are being made to develop novel routes by applying the concept of geometrical molecular design, for their synthesis and to design a single source precursor suited to photoluminescent materials. Novel and new series of bimetallic alkoxides has been prepared by metathesis route. They exhibit a lower sensitivity towards hydrolysis and so they are easier to handle as compared to other alkoxides. All the compounds were characterized by elemental analysis, FT-IR and multinuclear NMR spectroscopies. FT-IR revealed that the molecular structure of these metal alkoxides was retained to a large extent in 4 ： 1 halogenated alcohol-benzene solution. The heteronuclear NMR spectroscopy provided useful information about chemical shifts for better understanding the likely structure based on interactions with their coordinate metals. The mass spectra show similar types of fragmentation pattern. SEM-EDS analyses showed consistency with the formulation. XRD patterns show an enhanced homogeneity at high temperature. TGA measurements show that thermal decomposition occured in steps that depended entirely on the chemical compositions and the synthesis routes. SEM observation reveals that the morphology and particle size strongly depend on synthesis routes for their precursors.

关键词： precursor chemistry fluoro- or chloro-bimetallic alkoxide geometric design luminescent material

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