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Title: Mechanically controlled reversible photoluminescence response in all-inorganic flexible transparent ferroelectric/mica heterostructures
Authors: Zheng, M 
Sun, H 
Kwok, KW 
Issue Date: 2019
Publisher: Nature Publishing Group
Source: NPG Asia materials, 27 Sept. 2019, v. 11, 52, p. 1-8 How to cite?
Journal: NPG Asia materials 
Abstract: The ability to reversibly control the luminescent properties of functional materials with diverse external stimuli, such as an electric field, strain, and temperature, is crucial for designing high-performance optical devices. Here, we demonstrate that a purely mechanical strain in a flexible mica substrate triggered by bending can be used to dramatically modify the photoluminescence response of a Pr-doped Ba0.85Ca0.15Ti0.9Zr0.1O3 epitaxial thin film in a stable and repeatable manner with a large gauge factor of up to 6853. The strong dependence of the photoluminescence performance on the mechanical bending arises from strain-induced variations in the lattice symmetry of the host film and the local crystal field around the Pr3+. In particular, because of the nature of mica, the film structure exhibits excellent antifatigue characteristics after 10(4) bending cycles as well as high optical transparency in the range of 450-780 nm. This study provides a viable route for exploring the correlation between structural symmetry and photoluminescence in ferroelectric thin-film systems and offers new possibilities for developing all-inorganic, reconfigurable, transparent and flexible light sources, photodetectors, and wearable sensors.
ISSN: 1884-4049
EISSN: 1884-4057
DOI: 10.1038/s41427-019-0153-7
Rights: © The Author(s) 2019
Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution andreproductionin any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a linktotheCreativeCommons license,and indicate ifchanges were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicatedotherwise in a credit line to the material. Ifmaterial is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtainpermission directly from the copyright holder. To view a copy of this license, visit
The following publication Zheng, M., Sun, H. & Kwok, K.W. Mechanically controlled reversible photoluminescence response in all-inorganic flexible transparent ferroelectric/mica heterostructures. NPG Asia Mater 11, 52 (2019), 1-8 is available at
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