Achieving power-dependent fluorescence intensity ratio via enhanced photothermal effect in rare-earth and CaCu3TiO12 co-doped alkali niobate ceramics. Issue 17 (1st September 2022)

• Record Type: Journal Article
• Authors: Wang, Peng; Yu, Fangyuan; Lu, Yaojia; Wu, Xiao; Zhao, Chunlin; Gao, Min; Lin, Tengfei; Lin, Cong
• Is Part Of: Ceramics international. Volume 48:Issue 17(2022)
• Page Start: 25431
• Page End: 25438
• Publication Date: 2022-09-01
• Subjects: Photothermal effect -- Fluorescence intensity ratio -- Alkali niobate -- Up-conversion luminescence; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.05.220
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Controlling the laser power density is one of the major means to bring photothermal conversion phenomenon. However, only a slight temperature enhancement was achieved by exposure to the laser. How to enhance photothermal conversion to develop power-sensitive fluorescence intensity ratio technology becomes a problem. Here, we report an eco-friendly niobate-based ceramic (K0.25 Na0.25 NbO3 ) doped with rare earth ions (Er 3+, Yb 3+ ) and simultaneously modified with CaCu3 TiO4, exhibiting superior photothermal effect (PTE) and fluorescence intensity ratio (FIR). Thereinto, PTE originating from the up-conversion luminescence of Er 3+ greatly elevates due to the Cu 2+ quenching and Yb 3+ sensitization. Meanwhile, the defects formed by the volatilization of potassium and sodium at high temperature can enhance PTE (70 °C, 0.4 W) and power sensitivity ( S p = 0.61 W -1 ). Under multiple power cycles, stable FIR of the ceramic shows outstanding resistance to temperature in long-term power-dependent tests. Furthermore, this strategy can open opportunities for preparing efficient photothermal conversion ceramics and exploiting PTE for vision-to-tactile sensory conversion.