The design of dual-switch fluorescence intensity ratio thermometry with high sensitivity and thermochromism based on a combination strategy of intervalence charge transfer and up-conversion fluorescence thermal enhancement

Abstract

Currently, the temperature sensing performances of inorganic photoluminescence materials based on fluorescence intensity ratio technology have become research hotspot in the optical thermometry field due to its non-contact, fast response...

Humidity-Driven Color-Fluorescence Dual Switching of Naphthalenediimide Aggregates

“…Besides, the double output signals are highly desirable to reduce the potential interference and to provide a more reliable result. In these systems, a certain fluorescence parameter (e.g., intensity, lifetime, and spectral position) or color change is typically correlated to humidity to indirectly reflect its subtle variation. – However, humidity-responsive color- and fluorescence switching systems have rarely been reported. There remain some challenges in the above configurations, such as cumbersome manufacturing process, complex structure, need for external energy supply equipment, and lack of rapid humidity response. – For real-world applications, the requirements for miniaturization, portability, low power, large-scale production, and low cost are emergently required.…”

Designing dual-emission phosphors for temperature warning indication and dual-mode luminescence thermometry

“…[12][13][14] Although the current LIR temperature measurement technology based on luminescent materials is relatively mature, high sensitivity in the wide temperature range still remains a challenge, restricting further application. 15,16 The surrounding crystal field environment and the 5s/5p electrons can protect the outer electrons on the 4f orbitals of rare earth ions. This means that they are relatively unaffected by the environment.…”

Improving the temperature-sensing performance of the SrZn0.33Nb0.67O3:Pr3+ phosphor via Ga3+ doping

“…Currently, the temperature-sensing strategy based on the diverse temperature responses of 4f-5d or 4f-4f transitions of Pr 3+ is attracting much attention for its high signal discrimination and considerable temperature sensitivity. [16][17][18][19][20] Pr 3+ has abundant emission spectral lines, where blue, green, red and deep red emissions are derived from the 3 P 0 -3 H 4 , 3 P 1,0 -3 H 5 , 1 D 2 -3 H 4 and 3 P 0 -3 F 2 electronic transitions, respectively. Among these, the blue and red emissions that stem from the 3 P 0 and 1 D 2 states are usually used as signal peaks for research in FIR thermometry.…”