Charge Transfer Effects on Resonance-Enhanced Raman Scattering for Molecules Adsorbed on Single-Crystalline Perovskite

doi:10.1021/acsphotonics.8b00152

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	Charge Transfer Effects on Resonance-Enhanced Raman Scattering for Molecules Adsorbed on Single-Crystalline Perovskite
	Yu, Z.; Yu, W. L.; Xing, J.; Ganeev, R. A.; Xin, W.; Cheng, J. L.; Guo, C. L.
	2018
发表期刊	Acs Photonics
ISSN	2330-4022
卷号	5 期号:4 页码:1619-1627
摘要	Single-crystalline hybrid perovskites have important photoelectronic properties for advanced semiconductor devices, such as solar cells and photodetectors. However, neither the surface-enhanced Raman scattering (SERS) property nor the correlation between SERS and photo electronic properties for single-crystalline perovskites have ever been studied. Here, for the first time, we observed a 10(5) enhancement in SERS for 4-mercaptopyridine (MPY) adsorbed on a methylamine lead chlorine (MAPbCl(3)) single crystal. Compared to the Raman spectrum of bulk MPY molecules, the b(2) mode of the MPY molecule was selectively enhanced. This is attributed to the charge transfer (CT) resonance mechanism at the interface between the single crystal and the adsorbed molecules, which benefit from the Herzberg-Teller contribution. UV-vis spectra demonstrated that the modification with the MPY molecules leads to the formation of a new interfacial transition state, which matches the excitation laser photon energy and results in a CT resonance process under 532 nm laser excitation. The MPY-modified MAPbCl(3) single crystal was further applied to a photoelectronic device, and the device I-V curve was collected under 532 nm laser irradiation. The results indicate that the MPY-modified MAPbCl(3) shows a clear photoelectronic response to the 532 nm light. This study establishes a correlation between the CT resonance-enhanced Raman and the photoelectronic responses of perovskite materials and provides guidance for future molecule-sensitized perovskite photoelectronic device studies.
关键词	SERS charge transfer perovskite single crystal CH3NH3PbCl3 photoelectronic detection phase-transitions halide perovskites sers spectroscopy 4-mercaptopyridine nanoparticles ch3nh3pbcl3 metals films surfaces Science & Technology - Other Topics Materials Science Optics Physics
DOI	10.1021/acsphotonics.8b00152
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60926
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Yu, Z.,Yu, W. L.,Xing, J.,et al. Charge Transfer Effects on Resonance-Enhanced Raman Scattering for Molecules Adsorbed on Single-Crystalline Perovskite[J]. Acs Photonics,2018,5(4):1619-1627.
APA	Yu, Z..,Yu, W. L..,Xing, J..,Ganeev, R. A..,Xin, W..,...&Guo, C. L..(2018).Charge Transfer Effects on Resonance-Enhanced Raman Scattering for Molecules Adsorbed on Single-Crystalline Perovskite.Acs Photonics,5(4),1619-1627.
MLA	Yu, Z.,et al."Charge Transfer Effects on Resonance-Enhanced Raman Scattering for Molecules Adsorbed on Single-Crystalline Perovskite".Acs Photonics 5.4(2018):1619-1627.

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