Tunable-wavelength photoluminescence of a flexible transition metal doped oxide phosphor thin film

Authors

Zhengang Dong, Jiaying Shen, Fan Zhang, Yaping Qi, Yang Zhang, Gongxun Bai, Zhenping Wu, Danfeng Li

Publication date

2023/3/27

Journal

Applied Physics Letter

Volume

122

Issue

13

Publisher

AIP Publishing

Description

Near-infrared luminescence phosphors are key material basis to potential applications for light sources and optoelectronic devices. In 

particular, it is vital to tune the luminescent properties of these phosphors in a flexible and controllable manner. Here, we demonstrate 

that a flexural strain originated from bending can be used to modulate the photoluminescence of freestanding Ni 2+ doped SrTiO3 

membranes. The bent membranes show remarkable red-shift emissions, arising from the variations of the symmetry of host materials 

and the local crystal fields around the Ni 2+ ions. In addition, the phosphor films show a reversible and stable wavelength modulation 

with remarkable anti-fatigue characteristics after 10 4 bending cycles. These results provide a potential routine to develop flexible 

strain-tunable devices for applications in optical amplifiers and other optoelectronics.