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dc.contributor.authorShi, Jiangtao
dc.contributor.authorZhao, Yue
dc.contributor.authorWu, Yue
dc.contributor.authorChu, Jingyuan
dc.contributor.authorTang, Xiao
dc.contributor.authorLi, Xiaohang
dc.contributor.authorYu, Xin
dc.contributor.authorWu, Wei
dc.contributor.authorJiang, Guangyu
dc.contributor.authorSuo, Hongli
dc.contributor.authorJin, Zhijian
dc.date.accessioned2021-01-13T13:12:52Z
dc.date.available2021-01-13T13:12:52Z
dc.date.issued2020
dc.date.submitted2020-08-13
dc.identifier.citationShi, J., Zhao, Y., Wu, Y., Chu, J., Tang, X., Li, X., … Jin, Z. (2020). Pyrolysis behaviors dominated by the reaction–diffusion mechanism in the fluorine-free metal–organic decomposition process. Journal of Materials Chemistry C, 8(48), 17417–17428. doi:10.1039/d0tc03851b
dc.identifier.issn2050-7526
dc.identifier.issn2050-7534
dc.identifier.doi10.1039/d0tc03851b
dc.identifier.urihttp://hdl.handle.net/10754/666893
dc.description.abstractOwing to the advantages of its environmentally friendly process and superior high growth rate, the fluorine-free metal-organic decomposition (FF-MOD) is a promising route for the growth of REBa2Cu3O7-δ (REBCO, where RE is Y or other rare-earth elements) superconducting films. In this work, the pyrolysis behaviors dominated by the reaction-diffusion mechanism were investigated. Combining the atomic force microscopy and the nanoindentation analysis, we concluded that the strain generated by decomposition reactions plays a crucial role in defect formation. Due to the smooth release of the strain and enhancement of the mechanical properties, the defect-free film could be obtained under a fast process. However, an inhomogeneous microstructure along the film thickness was always found by cross-section observation, i.e., a dense layer at the top, while a porous layer was found at the bottom, being separated by a clear boundary. Accordingly, the one-dimensional reaction-diffusion model is proposed. In addition, the formation of such laminar structure is associated with different reaction mechanisms, depending on the diffusion of oxygen and evolved gases. Moreover, severe copper segregation was discerned in the dense layer, which would heavily affect the superconducting phase transformation. Remarkably, a high critical current density value exceeding 2 MA cm-2 (77 K, self-field) was achieved in the GdBa2Cu3O7 films grown on the CeO2 buffered technical substrates. This work provides deep insight into the pyrolysis behaviors of the FF-MOD route in view of the fabrication of REBCO superconducting films with high throughput. This journal is
dc.description.sponsorshipThe authors would like to acknowledge the financial support from the Shanghai Committee of Science and Technology, China (Grant No. 19511106900), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, the Instrument Analysis Center of Shanghai JiaoTong University for PPMS measurements, the Center for Advanced Electronic Materials and Devices (AEMD) for SEM observation, and thanks eceshi (www.eceshi.cn) for the nanoindentation analysis.
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://xlink.rsc.org/?DOI=D0TC03851B
dc.rightsArchived with thanks to Journal of Materials Chemistry C
dc.titlePyrolysis behaviors dominated by the reaction-diffusion mechanism in the fluorine-free metal-organic decomposition process
dc.typeArticle
dc.contributor.departmentAdvanced Semiconductor Laboratory
dc.contributor.departmentComputer, Electrical and Mathematical Science and Engineering (CEMSE) Division
dc.contributor.departmentElectrical and Computer Engineering Program
dc.identifier.journalJournal of Materials Chemistry C
dc.rights.embargodate2022-01-13
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Electronic Information and Electrical Engineering, Shanghai JiaoTong University 200240 Shanghai People's Republic of China Email: yuezhao@sjtu.edu.cn
dc.contributor.institutionShanghai Superconductor Technology Co., Ltd 200240 Shanghai People's Republic of China
dc.contributor.institutionCollege of Materials Science and Engineering, Beijing University of Technology 100022 Beijing People's Republic of China
dc.identifier.volume8
dc.identifier.issue48
dc.identifier.pages17417-17428
kaust.personTang, Xiao
kaust.personLi, Xiaohang
dc.date.accepted2020-10-31
dc.identifier.eid2-s2.0-85098585525


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