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Hot-Casting Large-Grain perovskite film for Efficient Solar Cells:film Formation and Device Performance

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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Review of blue perovskite light emitting diodes with optimization strategies for perovskite film and device structure

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Opto-Electronic Advances 2021年第2期4卷 19-47页

作者： Zongtao Li Kai Cao Jiasheng Li Yong Tang Xinrui Ding Binhai Yu National&Local Joint Engineering Research Center of Semiconductor Display and Optical Communication Devices South China University of TechnologyGuangdong 510640China Foshan Nationstar Optoelectronics Company Ltd. Foshan 528000China

perovskite light emitting diodes(PeLEDs)have attracted considerable research attention because of their external quantum efficiency(EQE)of>20%and have potential scope for further ***,compared to red and green PeLEDs,blue PeLEDs have not been extensively investigated,which limits their commercial applications in the fields of luminance and full-color *** this review,blue-PeLED-related research is categorized by the composition of *** main challenges and corresponding optimization strategies for perovskite films are ***,the novel strategies for the design of device structures of blue PeLEDs are reviewed from the perspective of transport layers and interfacial ***,future directions for blue PeLEDs are *** review can be a guideline for optimizing perovskite film and device structure of blue PeLEDs,thereby enhancing their development and application scope.

关键词： perovskite light emitting diodes perovskite film device structure blue LEDs

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Solvent engineering towards scalable fabrication of high-quality perovskite films for efficient solar modules

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Journal of Energy Chemistry 2023年第5期80卷 689-710,I0015页

作者： Zhaoyi Jiang Binkai Wang Wenjun Zhang Zhichun Yang Mengjie Li Fumeng Ren Tahir Imran Zhenxing Sun Shasha Zhang Yiqiang Zhang Zhiguo Zhao Zonghao Liu Wei Chen Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan 430074HubeiChina China-EU Institute for Clean and Renewable Energy(ICARE) Huazhong University of Science and Technology(HUST)Wuhan 430074HubeiChina State Key Lab of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006ShanxiChina Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006ShanxiChina Huaneng Clean Energy Research Institute BeijingChina School of Materials Science and Engineering&Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450001HenanChina

Over the last decade,remarkable progress has been made in metal halide perovskite solar cells(PSCs),which have been a focus of emerging photovoltaic techniques and show great potential for ***,the upscaling of small-area PSCs to large-area solar modules to meet the demands of practical applications remains a significant *** scalable production of high-quality perovskite films by a simple,reproducible process is crucial for resolving this ***,the crystallization behavior in the solution-processed fabrication of perovskite films can be strongly influenced by the physicochemical properties of the precursor inks,which are significantly affected by the employed solvents and their interactions with the ***,a comprehensive understanding of solvent engineering for fabricating perovskite films over large areas is urgently *** this paper,we first analyze the role of solvents in the solution-processed fabrication of large-area perovskite films based on the classical crystal nucleation and growth *** efforts in solvent engineering to improve the quality of perovskite films for solar modules are ***,the basic principles and future challenges of solvent system design for scalable fabrication of high-quality perovskite films for efficient solar modules are proposed.

关键词： Solvent engineering Scalable fabrication perovskite film Solar cell Module

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Reducing the Universal “Coffee-Ring Effect” by a Vapor-Assisted Spraying Method for High-Efficiency CH3NH3PbI3 perovskite Solar Cells

Reducing the Universal “Coffee-Ring Effect” by a Vapor-Ass...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： Haibin Chen Xu Pan Songyuan Dai Shaopeng Yang Hebei University Chinese Academy of Sciences North China Electric Power University

Herein, spray coating as a deposition technique was explored to prepare perovskite films and break the bottleneck that plagued large-scale production. However, it is hard to reduce the notorious "coffee-ring effect" during the process of spraying perovskite films especially in a one-step spraying method. Thus, the vapor-assisted spraying method(VASM), namely, fabricating perovskite films through a vapor-solid in situ reaction between CHNHI vapor and sprayed PbI films, was creatively applied to the preparation of dense and uniform perovskite films. The surfaces of the sprayed PbI films were optimized by adjusting the wettability, viscosity, and contact quality via various methods such as the selection of solvent, solution concentration, and substrate temperature to inhibit the capillary flow and release the pinning contact line. The application of a component solvent could effectively crush the dense structure of the PbI film, optimizing the morphology of PbI films and reducing the influence of the coffee-ring effect. Integrating the above aspects, the optimized PbI films could form uniform perovskite films via an in situ reaction, and a best power conversion efficiency of 17.56% was achieved for planar structure PSCs, which is high among the PSCs fabricated by the spraying method. In addition, the VASM could be applied in the actual conditions for mass production, exhibiting excellent optical and electrical properties and paving the way of the commercialization of PSCs.

关键词： vapor-assisted spraying perovskite film surface optimization coffee-ring effect large area

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Sulfur-donor Lewis Base Enabled Interaction Tuning with PbI2 Molecule for Modulation of perovskite Crystallization

Sulfur-donor Lewis Base Enabled Interaction Tuning with PbI2...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： Chenzhe Xu Haonan Si Zhuo Kang Shuangfei Ma Zhaozhao Xiong Yunqi Zhao Yue Zhang State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology Beijing Beijing Municipal Key Laboratory of New Energy Materials and Technologies University of Science and Technology Beijing

In the past several years, organic-inorganic halide perovskite solar cells have attained tremendous development and achieved certified power conversion efficiency as high as 23.3%.As the core component of the whole device, high-quality perovskite films with few defects are vital for attaining high performance solar ***, unexpected perovskite films with pinholes are formed because of the lack of precise control over the crystal crystallization ***, we demonstrate an efficient method for modulating the perovskite crystallization through the introduction of thioacetamide(TAA). Compared with pristine perovskite films, TAA-treated perovskite films show enlarged grain size, improved crystal quality, prolonged carrier lifetime and reduced defect density. Moreover, the retarded phase transformation during perovskite film formation process has been investigated. In addition, we ascribe the regulation effect of perovskite crystallization to the interaction between small Lewis Base molecules and PbI molecules, which is revealed by Fourier transform infrared(FTIR) spectra and density function theory(DFT) calculation. As a result, the TAA-incorporated devices based on MAPbI and Cs(FAMA)0.95b(IBr) absorber achieve champion efficiencies of 19.43% and 20.30% under standard AM 1.5 G reporting conditions, respectively. This work offers an effective way to fabricate high quality perovskite films by control of perovskite crystallization via the utilization of Lewis base.

关键词： perovskite film Lewis Base Thioacetamide Crystal crystallization process

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