Synthesis, characterization and up-conversion luminescence properties of α -NaYF4:Yb3+/Er3+/PVP/MOFs multilayer nanocrystals
oleh: Thi Kieu Giang Lam, Lukasz Marciniak, Quang Huy Tran, Manh Tien Dinh, Duc Chinh Vu, Vu Nguyen, Thu Huong Tran, Thi Khuyen Hoang, Thanh Huong Nguyen, Duc Roan Pham, Thanh Binh Nguyen, Quoc Minh Le
| Format: | Article |
|---|---|
| Diterbitkan: | Vietnam Ministry of Science and Technology 2017-09-01 |
Deskripsi
The precursor PVP-capped α -NaYF4:Yb3+/Er3+ nanospheres were used as the templates for preparing the α -NaYF4:Yb3+/Er3+/PVP/MOFs multilayer nanocrystals with a self-template method. By using iron (III) carboxylate and zeolitic imidazolate frameworks dissolved in dimethylformamide (DMF) solution containing 25% of diethylene glycol (DEG), the sphericalshaped α -NaYF4:Yb3+/Er3+/PVP/MIL-100 and α -NaYF4:Yb3+/Er3+/PVP/ ZIF-8 multilayer nanocrystals were successfully prepared with the sizes of 300-500 nm at 100oC for one hour. Under a 976 nm laser excitation at room temperature, the α -NaYF4:Yb3+/Er3+/PVP/MIL-100 and α-NaYF4:Yb3+/ Er3+/PVP/ZIF-8 multilayer nanocrystals exhibited strong up-conversion luminescence with three emission bands centered at around 520 nm, 540 nm, and 655 nm corresponding to 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, and 4F9/2 → 4I15/2 transitions of Er3+ ions, respectively.