van der Waals epitaxy for highly tunable all-inorganic transparent flexible ferroelectric luminescent films

Ferroelectric luminescent materials with more unique requirements, such as high-speed, low-cost, and low-power, and being light-weight, all-inorganic, transparent, flexible and wearable, are of great demand for future smart device applications. Here, we report the direct fabrication of highly flexib...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2019, Vol.7 (27), p.831-8315
Main Authors: Zheng, Ming, Li, Xue-Yan, Ni, Hao, Li, Xiao-Min, Gao, Ju
Format: Article
Language:English
Subjects:
Bending
Epitaxy
Ferroelectric materials
Ferroelectricity
Memory devices
Mica
Optical properties
Photoluminescence
Strain
Substrates
Thin films
Wearable technology
Weight reduction
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Summary:Ferroelectric luminescent materials with more unique requirements, such as high-speed, low-cost, and low-power, and being light-weight, all-inorganic, transparent, flexible and wearable, are of great demand for future smart device applications. Here, we report the direct fabrication of highly flexible and transparent Eu-doped 0.94Bi 0.5 Na 0.5 TiO 3 -0.06BaTiO 3 epitaxial thin films on mica substrates via van der Waals epitaxy. The photoluminescence switching of the films exhibits no noticeable decay after being flexed in or out to 2 mm radius for 10 4 cycles, revealing the robust functionality against mechanical bending. Furthermore, we demonstrate that the photoluminescence intensity can be greatly enhanced by the bending-induced mechanical strain either in the tensile or compressive state, with a striking giant gauge factor of 3580. This work illustrates the role of MICAtronics, i.e. , van der Waals epitaxy on mica, in designing all-inorganic flexible ferroelectric luminescent thin films with highly controllable optical properties for application in tunable transparent wearable memory devices, sensors and displays. The direct fabrication of flexible transparent ferroelectric luminescent films on mica with highly tunable photoluminescence response is demonstrated.
ISSN:2050-7526
2050-7534
DOI:10.1039/c9tc01684h