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题名: (C6H5C2H4NH3)(2)GeI4: A Layered Two-Dimensional Perovskite with Potential for Photovoltaic Applications
作者: Cheng, Pengfei1, 2;  Wu, Tao1, 3;  Zhang, Jiangwei4;  Li, Yajuan1, 2;  Liu, Junxue1;  Jiang, Lei1;  Mao, Xin1, 2;  Lu, Rui-Feng3;  Deng, Wei-Qiao1;  Han, Keli1
刊名: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
发表日期: 2017-09-21
DOI: 10.1021/acs.jpclett.7b01985
卷: 8, 期:18, 页:4402-4406
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: Recently, two-dimensional organic inorganic perovskites have attracted increasing attention due to their unique photophysical properties and high stability. Here we report a lead-free, two-dimensional perovskite, (PEA)(2)GeI4 (PEA = C6H5(CH2)(2)NH3+). Structural characterization demonstrated that this 2D perovskite structure is formed with inorganic germanium iodide planes separated by organic PEAT layers. (PEA)2GeI4 has a direct band gap of 2.12 eV, in agreement with 2.17 eV obtained by density functional theory (DFT) calculations, implying that it is suitable for a tandem solar cell. (PEA)(2)GeI4 luminesces at room-temperature with a moderate lifetime, exhibiting good potential for photovoltaic applications. In addition, 2D (PEA)(2)GeI4 is more stable than 3D CH3NH3GeI3 in air, owing to the presence of a hydrophobic organic long chain. This work provides a direction for the development of 2D Ge-based perovskites with potential for photovoltaic applications.
关键词[WOS]: ORGANIC-INORGANIC PEROVSKITES ;  METAL-HALIDE PEROVSKITES ;  AUGMENTED-WAVE METHOD ;  OPTICAL-PROPERTIES ;  SEMICONDUCTORS ;  TRANSITIONS ;  COMPOUND ;  DESIGN
语种: 英语
WOS记录号: WOS:000411781900013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150202
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Gold Catalysis Res Ctr, Dalian 116023, Peoples R China

Recommended Citation:
Cheng, Pengfei,Wu, Tao,Zhang, Jiangwei,et al. (C6H5C2H4NH3)(2)GeI4: A Layered Two-Dimensional Perovskite with Potential for Photovoltaic Applications[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2017,8(18):4402-4406.
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