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Upconversion Luminescent Humidity Sensors Based on Lanthanide-Doped MOFs
| Content Provider | MDPI |
|---|---|
| Author | Wang, Zhuo Sun, Guotao Chen, Jiabo Xie, Yao Jiang, Hong Sun, Lining |
| Copyright Year | 2022 |
| Description | Lanthanide-doped metal-organic frameworks (Y/Yb/Er-MOF) were synthesized by a low-cost solvothermal method. The obtained Y/Yb/Er-MOF shows the cooperative upconversion luminescence of $Yb^{3+}$ and upconversion luminescence of $Er^{3+}$ $(Yb^{3+}$-sensitized) irradiated by a continuous wave 980 nm laser. In order to explore the potential application of Y/Yb/Er-MOF in relative humidity (RH) sensors, the RH responsiveness of Y/Yb/Er-MOF was investigated by measuring the intensity changes of upconversion luminescence. The Y/Yb/Er-MOF possesses two luminescence centers, in which $Yb^{3+}$ forms emission at 500 nm through the cooperative luminescence effect, and $Er^{3+}$ achieves 660 nm emission through excited state absorption and successive energy transfer from $Yb^{3+}$. Hence, the ratio meter luminescence sensor for RH is constructed based on Y/Yb/Er-MOF. The results show that the response of Y/Yb/Er-MOF to RH presents a linear relationship in the range of 11–95%. The cycle stability of Y/Yb/Er-MOF responses to RH was investigated with the intensity changes of upconversion luminescence, and the recovery ratio was more than 93% each time. Therefore, the Y/Yb/Er-MOF is a humidity-sensitive material with great potential for applications such as humidity sensors. |
| Starting Page | 66 |
| e-ISSN | 22279040 |
| DOI | 10.3390/chemosensors10020066 |
| Journal | Chemosensors |
| Issue Number | 2 |
| Volume Number | 10 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-02-07 |
| Access Restriction | Open |
| Subject Keyword | Chemosensors Upconversion Luminescence Lanthanide Luminescence Lanthanide-doped Metal-organic Frameworks Humidity Sensor |
| Content Type | Text |
| Resource Type | Article |
