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defects in Graphene:Generation,healing,and Their Effects on the Properties of Graphene:A Review

Journal of Materials Science & Technology 2015年第6期31卷 599-606页

作者： Lili Liu Miaoqing Qing Yibo Wang Shimou Chen Department of Chemistry School of ScienceBeijing Technology and Business University Key Laboratory of Green Process and Engineering Institute of Process Engineering(IPE)Chinese Academy of Sciences(CAS)

Graphene has attracted immense investigation since its *** imperfections are introduced into graphene unavoidably during graphene growth or *** structural defects are known to significantly affect electronic and chemical properties of graphene.A comprehensive understanding of graphene defect is thus of critical *** we review the major progresses made in defectrelated engineering of ***,we give a brief introduction on the types of defects in ***,the generation and healing of the graphene defects are ***,the effects of defects on the chemical,electronic,magnetic,and mechanical properties of graphene are ***,we address the associated challenges and prospects on the future study of defects in graphene and other nanocarbon materials.

关键词： Graphene Vacancy defect healing Band gap modulatio

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Inorganic material passivation of defects toward efficient perovskite solar cells

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Science Bulletin 2020年第23期65卷 2022-2032,M0004页

作者： Wenjing Qi Xin Zhou Jiale Li Jian Cheng Yuelong Li Min Jae Ko Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Key Laboratory of Photoelectronic Thin Film Devices and Technology of TianjinSolar Energy Research CenterNankai UniversityTianjin 300350China Collaborative Innovation Center of Chemical Science and Engineering Renewable Energy Conversion and Storage Center of Nankai UniversityTianjin 300072China Department of Chemical Engineering Hanyang UniversitySeoul 04763Republic of Korea

Surface passivation with organic materials is one of the most effective and popular strategies to improve the stability and efficiency of perovskite solar cells(PSCs). However, the secondary bonding formed between organic molecules and perovskite layers is still not strong enough to protect the perovskite absorber from degradation initialized by oxygen and water attacking at defects. Recently, passivation with inorganic materials has gradually been favored by researchers due to the effectiveness of chemical and mechanical passivation. Lead-containing substances, alkali metal halides, transition elements, oxides,hydrophobic substances, etc. have already been applied to the surface and interfacial passivation of *** inorganic substances mainly manipulate the nucleation and crystallization process of perovskite absorbers by chemically passivating defects along grain boundaries and surface or forming a mechanically protective layer simultaneously to prevent the penetration of moisture and oxygen, thereby improving the stability and efficiency of the PSCs. Herein, we mainly summarize inorganic passivating materials and their individual passivation principles and methods. Finally, this review offers a personal perspective for future research trends in the development of passivation strategies through inorganic materials.

关键词： Perovskite solar cells Inorganic materials passivation defect healing Stability

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