Fluorescence temperature sensing based on thermally activated singlet-triplet intersystem crossing in crystalline anthracene
| Autor: | Tang, Cheng, Zhu, Xiaojun, Song, Yunfei, Liu, Weilong, Yang, Qingxin, lv, Zhe, Yang, Yanqiang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | J. Appl. Phys. (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.5099292 |
| Popis: | The temperature dependence of the steady-state fluorescence spectrum of anthracene crystals range from 300K to 500K had been investigated, which was in the temperature range of most tabletop laser-driven shock wave experiments. The interesting finding is that the fluorescence intensity of the 2-0 transition increases more rapidly than other transitions with the rising temperature. In particular, the transition intensity ratios {\gamma}n all shows a perfect exponential increasing curve, which can be used for fluorescence temperature sensing. The analysis of sensitivity {\eta} and random uncertainty {\Delta}T has demonstrated that the intensity ratio {\gamma}2 is the best comprehensive performance physical quantity for temperature sensing. The theoretical analysis and experimental results demonstrated that unusual intensity increasing of 2-0 transition was originated from the second excited triplet state T2, which was thermally coupled with the first excited singlet sate S1. In a word, we established a new fluorescence temperature sensing method based on the intensity ratio and clarified the mechanism of this method was the thermally activated singlet-triplet intersystem crossing. Comment: 10 pages, 5figures |
| Databáze: | arXiv |
| Externí odkaz: |
|