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dc.contributor.authorHettiarachchi, Chathurangaen_US
dc.contributor.authorXie, Aozhenen_US
dc.contributor.authorNguyen, Tien Hoaen_US
dc.contributor.authorYu, Junhongen_US
dc.contributor.authorMaddalena, Francescoen_US
dc.contributor.authorDinh, Xuan Quyenen_US
dc.contributor.authorMuhammad Danang Birowosutoen_US
dc.contributor.authorDang, Cuongen_US
dc.identifier.citationHettiarachchi, C., Xie, A., Nguyen, T. H., Yu, J., Maddalena, F., Dinh, X. Q., . . . Dang, C. (2019). Current oscillations and intermittent emission near an electrode interface in a hybrid organic-inorganic perovskite single crystal. ACS Applied Materials & Interfaces, 11(45), 42838-42845. doi:10.17645/mac.v7i4.2275en_US
dc.description.abstractHybrid organic-inorganic lead perovskites have a great potential in optoelectronic device applications because of their high stability, narrow band emission, and strong luminescence. Single crystals with few defects are the best candidates to disclose a variety of interesting and important properties for light-emitting devices. Here, we investigate a single-crystalline CH3NH3PbBr3 perovskite for its transport and electroluminescence properties. A simple fabrication method was used to obtain a 10 ± 2 μm channel between two gold wire electrodes, which showed bright intermittent electroluminescence near the interface of one wire after cooling down with a constant biasing voltage. The active region of the perovskite single crystal was pristine, well isolated from surroundings through fabrication to the characterization process. Our presented sample provided an ideal condition to study bulk ionic-electronic properties of hybrid halide perovskites. At constant 6 V bias, the current through the sample shows temperature-dependent oscillation with Arrhenius behavior, suggesting a thermally activated process. The light emission from the sample experiences an intermittent emission rate once every 26 ± 6 min. Here, we envisage that the current oscillations and intermittent emission are caused by ion-mediated negative differential resistance and conductive filament formation, respectively. The latter observation inspires future applications of the material from neuromorphic computing to the development of electroluminescence devices.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.relation.ispartofACS Applied Materials & Interfacesen_US
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
dc.subjectEngineering::Electrical and electronic engineeringen_US
dc.titleCurrent oscillations and intermittent emission near an electrode interface in a hybrid organic-inorganic perovskite single crystalen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.organizationCNRS-International-NTU-THALES-Research Alliances/UMI 3288 (CINTRA)en_US
dc.contributor.organizationThe Photonics Instituteen_US
dc.contributor.researchEnergy Research Institute @ NTU (ERI@N)en_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsPerovskite Single-crystal LEDen_US
dc.subject.keywordsIonic Conductanceen_US
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