Abstract
A strategy to improve the sensitivity of NaLuF4:Yb3+/Er3+ is elaborated via incorporation Mn2+ ions, which results a closed energy transfer between Er3+ and Mn2+ ions (4S3/2 (Er3+) → 4T1 (Mn2+) → 4F9/2 (Er3+)). The NaLuF4:Yb3+/Er3+ and NaLuF4:Yb3+/Er3+/Mn2+ phosphors are prepared by a hydrothermal method. Notably, incorporation Mn2+ for NaLuF4:Yb3+/Er3+ phosphor rusults in enhancing the red to green intensity ratio, which acts as a bridge for energy transfer between 4S3/2 and 4F9/2 levels of Er3+. The temperature sensing behaviors of two phosphors are investigated in the 295–595 K range using a ratiometric technique under 980 nm excitation. Based on thermally (2H11/2 and 4S3/2) and non-thermally (4F9/2 and 4S3/2) coupled levels of Er3+, the influences of this energy transfer are discussed in detail. The sensitivity of NaLuF4:Yb3+/Er3+ doping with Mn2+ ions based on non-thermally coupled levels is much higher than that without Mn2+ ions based on both thermally and non-thermally coupled levels in the 295–525 K range. The maximum sensitivity is 10.99 × 10−3 K−1 at 295 K for NaLuF4:Yb3+/Er3+/Mn3+ phosphor. These meaning results indicate that incorporation Mn2+ ions in NaLuF4:Yb3+/Er3+ phosphor is an effective method for enhancing sensitivity in the 295–525 K range.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
