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Nondestructive Visualization of Interfacial Conducting Inhomogeneities in Memristive Oxides by Electroluminescence
Author(s) -
Lin Weijian,
Li Dong,
Su Yangtao,
Shi Haibin,
Wang Li,
Cao Xinyu,
Meng Yang,
Zhao Hongwu
Publication year - 2021
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202001617
Subject(s) - materials science , electroluminescence , oxygen , resistive touchscreen , chemical physics , electric field , non equilibrium thermodynamics , optoelectronics , polarity (international relations) , condensed matter physics , nanotechnology , electrical engineering , thermodynamics , chemistry , physics , organic chemistry , engineering , layer (electronics) , quantum mechanics , genetics , biology , cell
The formation of conducting paths consisting of oxygen vacancies plays a crucial role in the resistive switching (RS) phenomenon in oxides. However, it is extremely challenging to probe the dynamic distribution of oxygen vacancies under changing electric field without breaking the device. In this work, the temporal‐spatial variation of oxygen vacancies in memristive Nb‐SrTiO 3 devices has been investigated nondestructively by defect states mediated electroluminescence (EL). The disparate spatial inhomogeneities of conducting paths penetrating the Au/Nb‐SrTiO 3 interfaces are clearly demonstrated on the device scale, which is completely subject to the forming bias polarity. Moreover, the EL spectroscopy results confirm the existence of temporary nonequilibrium states in conducting paths. The causal relationship between the EL emission and oxygen vacancies concentration paves a pathway to explore RS dynamics in oxides, and further to design novel electro‐optical devices.