Thermodynamically Stable Orthorhombic gamma-CsPbI3 Thin Films for High-Performance Photovoltaics
文献类型：期刊论文
| 作者 | Zhao, Boya1,2; Jin, Shi-Feng3; Huang, Sheng4; Liu, Ning3; Ma, Jin-Yuan1,5; Xue, Ding-Jiang1,5; Han, Qiwei6; Ding, Jie1,5; Ge, Qian-Qing1,5; Feng, Yaqing2 |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2018-09-19 |
| 卷号 | 140期号:37页码:11716-11725 |
| ISSN号 | 0002-7863 |
| DOI | 10.1021/jacs.8b06050 |
| 英文摘要 | All-inorganic lead halide perovskites demonstrate improved thermal stability over the organic inorganic halide perovskites, but the cubic alpha-CsPbI3 with the most appropriate bandgap for light harvesting is not structurally stable at room temperature and spontaneously transforms into the undesired orthorhombic delta-CsPbI3. Here, we present a new member of black-phase thin films of all-inorganic perovskites for high-efficiency photovoltaics, the orthorhombic gamma-CsPbI3 thin films with intrinsic thermodynamic stability and ideal electronic structure. Exempt from introducing organic ligands or incorporating mixed cations/anions into the crystal lattice, we stabilize the gamma-CsPbI3 thin films by a simple solution process in which a small amount of H2O manipulates the size-dependent phase f ormation through a proton transfer reaction. Theoretical calculations coupled with experiments show that gamma-CsPbI3 with a lower surface free energy becomes thermodynamically preferred over delta-CsPbI3 at surface areas greater than 8600 m(2)/mol and exhibits comparable optoelectronic properties to alpha-CsPbI3. Consequently, gamma-CsPbI3-based solar cells display a highly reproducible efficiency of 11.3%, among the highest records for CsPbI3 thin-film solar cells, with robust stability in ambient atmosphere for months and continuous operating conditions for hours. Our study provides a novel and fundamental perspective to overcome the Achilles' heel of the inorganic lead iodide perovskite and opens it up for high-performance optoelectronic devices. |
| 语种 | 英语 |
| WOS记录号 | WOS:000445439700028 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/42975]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Feng, Yaqing; Hu, Jin-Song |
| 作者单位 | 1.Chinese Acad Sci, Natl Res Ctr Mol Sci, Key Lab Mol Nanostruct & Nanotechnol, Inst Chem, Beijing 100190, Peoples R China 2.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300350, Peoples R China 3.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 4.Beijing Inst Technol, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Sch Mat Sci & Engn, Beijing 100081, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Duke Univ, Dept Chem, Durham, NC 27708 USA |
| 推荐引用方式 GB/T 7714 | Zhao, Boya,Jin, Shi-Feng,Huang, Sheng,et al. Thermodynamically Stable Orthorhombic gamma-CsPbI3 Thin Films for High-Performance Photovoltaics[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2018,140(37):11716-11725. |
| APA | Zhao, Boya.,Jin, Shi-Feng.,Huang, Sheng.,Liu, Ning.,Ma, Jin-Yuan.,...&Hu, Jin-Song.(2018).Thermodynamically Stable Orthorhombic gamma-CsPbI3 Thin Films for High-Performance Photovoltaics.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,140(37),11716-11725. |
| MLA | Zhao, Boya,et al."Thermodynamically Stable Orthorhombic gamma-CsPbI3 Thin Films for High-Performance Photovoltaics".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 140.37(2018):11716-11725. |
入库方式： OAI收割
来源：化学研究所
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