CaSnO3:Tb3+ nanofibers with blue/green emission and CaSnO3:Tb3+/Eu3+nanofibers with white-light emission and multi-color luminescence assist photon barcode via energy transfer

It is crucial to develop color-tunable fluorescent materials with single-matrix. In this study, Electrospinning coupled with oxidative sintering is employed to successfully fabricate CaSnO 3 (CSO):RE 3+ (RE = Tb, Tb/Eu) one-dimensional nanofibers (NFs). To achieve multi-color luminescence and white-light emission in a single matrix, Eu 3+ ions are introduced into CSO:Tb 3+ 1D NFs to gain CSO:Tb 3+ /Eu 3+ 1D NFs. In the CSO:Tb 3+ /Eu 3+ NFs, Tb 3+ ions play a dual role as both luminescent center and sensitizer by virtue of energy level matching engineering. By adjusting the excitation wavelength and doping concentration of Tb 3+ and Eu 3+ ions, the luminescence color of CSO:RE 3+ (RE = Tb, Tb/Eu) NFs can be regulated, achieving multi-color luminescence from blue to blue-green, green, white, and red. Meanwhile, multiple emission peaks in the emission spectra of the CSO:RE 3+ (RE = Tb, Tb/Eu) enable high information storage and anti-counterfeiting capacity.