Relationship of Giant Dielectric Constant and Ion Migration in CH3NH3PbI3 Single Crystal Using Dielectric Spectroscopy
文献类型：期刊论文
| 作者 | Li, WW; Man, ZY; Zeng, JT; Zheng, LY; Li, GR; Kassiba, A |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2020-06-18 |
| 期号 | 24页码:13348 |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/acs.jpcc.0c02971 |
| 文献子类 | Article |
| 英文摘要 | Dielectric investigations of MAPbI(3) single crystal were carried out in broad frequency and temperature ranges. Giant dielectric constant up to 10(6) was found from these measurements at low frequencies and discussed as originating from the intrinsic polarization involved in the hybrid network and from the induced polarization of the electrodes by ion migration. Different temperature and frequency evolution regimes were pointed out and discussed for the dielectric functions (epsilon'(omega, T), epsilon ''(omega, T)), as also shown for the electrical conductivity (sigma'(omega, T), sigma '' (omega, T)). Relevant phenomenological approaches based on the modified Cole-Cole and Debye-like relaxation models were applied to analyze the involved dielectric and conductivity behaviors. Thus, the migration of MA(+) at high temperatures increases the electrode polarization in the low-frequency range. For intermediate frequencies, the hopping of ions leads to the Debye-type relaxation at low temperatures, while the modified Cole-Cole relaxation process is more relevant at high temperatures. The performed analysis points out the correlation of the ac conductivity ensured by the ion migration and the giant dielectric constant with activation energy dependent on the polar ions MA(+). |
| WOS关键词 | PEROVSKITE ; CONDUCTIVITY ; RELAXATION ; POLARIZATION ; DIFFUSION ; OXIDE |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27970]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Li, WW,Man, ZY,Zeng, JT,et al. Relationship of Giant Dielectric Constant and Ion Migration in CH3NH3PbI3 Single Crystal Using Dielectric Spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2020(24):13348. |
| APA | Li, WW,Man, ZY,Zeng, JT,Zheng, LY,Li, GR,&Kassiba, A.(2020).Relationship of Giant Dielectric Constant and Ion Migration in CH3NH3PbI3 Single Crystal Using Dielectric Spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY C(24),13348. |
| MLA | Li, WW,et al."Relationship of Giant Dielectric Constant and Ion Migration in CH3NH3PbI3 Single Crystal Using Dielectric Spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY C .24(2020):13348. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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