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Controlling Ion Conductance and Channels to Achieve Synapticlike Frequency Selectivity

Nano-Micro Letters 2015年第2期7卷 121-126页

作者： Siheng Lu Fei Zeng Wenshuai Dong Ao Liu Xiaojun Li Jingting Luo Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Institute of Thin Film Physics and Applications Shenzhen Key Laboratory of Sensor Technology Shenzhen University

Enhancing ion conductance and controlling transport pathway in organic electrolyte could be used to modulate ionic kinetics to handle signals. In a Pt/Poly(3-hexylthiophene-2,5-diyl)/Polyethylene?Li CF3SO3/Pt hetero-junction, the electrolyte layer handled at high temperature showed nano-fiber microstructures accompanied with greatly improved salt solubility. ions with high mobility were confined in the nano-fibrous channels leading to the semiconducting polymer layer,which is favorable for modulating dynamic doping at the semiconducting polymer/electrolyte interface by pulse *** a device realized synaptic-like frequency selectivity, i.e., depression at low frequency stimulation but potentiation at high-frequency stimulation.

关键词： ions migration Nano-channels Frequency selectivity Semiconducting polymer Organic electrolyte Dynamic doping

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In situ Investigations of Interfacial Degradation and Ion migration at CH3NH3PbI3 Perovskite/Ag Interfaces

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Chinese Journal of Chemical Physics 2019年第3期32卷 299-305,I0001,I0013-I0015页

作者： Xiong Li Hong-he Ding Gui-hang Li Yan Wang Zhi-min Fang Shang-feng Yang Huan-xin Ju Jun-fa Zhu National Synchrotron Radiation Laboratory and Department of Chemical Physics University of Science and Technology of ChinaHefei 230029China Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Materials for Energy ConversionChinese Academy of SciencesDepartment of Materials Science and EngineeringSynergetic Innovation Center of Quantum Information & Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China

Interfacial properties between perovskite layers and metal electrodes play a crucial role in the device performance and the long-term stability of perovskite solar ***,we report a comprehensive study of the interfacial degradation and ion migration at the interface between CH3NH3PbI3 perovskite layer and Ag *** in situ photoemission spectroscopy measurements,we found that the Ag electrode could induce the degradation of perovskite layers,leading to the formation of PbI2 and AgI species and the reduction of Pb^2+ions to metallic Pb species at the *** unconventional enhancement of the intensities of I 3d spectra provides direct experimental evidences for the migration of iodide ions from CH3NH3PbI3 subsurface to Ag ***,the contact of Ag electrode and perovskite layers induces an interfacial dipole of 0.3 eV at CH3NH3PbI3/Ag interfaces,which may further facilitate iodide ion diffusion,resulting in the decomposition of perovskite layers and the corrosion of Ag electrode.

关键词： Perovskite solar cells Interfacial degradation ions migration Photoemission spectroscopy

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