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

作者：Dong, Zhengang; Shen, Jiaying; Zhang, Fan; Qi, Yaping; Zhang, Yang; Bai, Gongxun^*; Wu, Zhenping^*; Li, Danfeng^*

来源：Applied Physics Letters, 2023, 122(13): 132908.

DOI：10.1063/5.0147266

• NEAR-INFRARED LUMINESCENCE

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 Ni2+ 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 Ni2+ 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.

• 单位
  南开大学