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Relationship of Giant Dielectric Constant and Ion Migration in CH3NH3PbI3 Single Crystal Using Dielectric Spectroscopy
Li, WW; Man, ZY; Zeng, JT; Zheng, LY; Li, GR; Kassiba, A
2020-06-18
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Issue24Pages:13348
SubtypeArticle
AbstractDielectric 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(+).
DOI10.1021/acs.jpcc.0c02971
WOS KeywordPEROVSKITE ; CONDUCTIVITY ; RELAXATION ; POLARIZATION ; DIFFUSION ; OXIDE
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27970
Collection中国科学院上海硅酸盐研究所
Recommended Citation
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.
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