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Incorporating Rare-Earth Terbium(III) Ions into Cs2AgInCl6:Bi Nanocrystals toward Tunable Photoluminescence |
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| Authors: | Ying Liu Dr. Ximing Rong Mingze Li Prof. Maxim S. Molokeev Prof. Jing Zhao Prof. Zhiguo Xia |
| Affiliation: | 1. The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, 100083 P. R. China These authors contributed equally to this work.;2. Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060 P. R. China These authors contributed equally to this work.;3. The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, 100083 P. R. China;4. Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RASs, Krasnoyarsk, 660036 Russia Department of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, 660041 Russia Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021 Russia |
| Abstract: | The incorporation of impurity ions or doping is a promising method for controlling the electronic and optical properties and the structural stability of halide perovskite nanocrystals (NCs). Herein, we establish relationships between rare-earth ions doping and intrinsic emission of lead-free double perovskite Cs2AgInCl6 NCs to impart and tune the optical performances in the visible light region. Tb3+ ions were incorporated into Cs2AgInCl6 NCs and occupied In3+ sites as verified by both crystallographic analyses and first-principles calculations. Trace amounts of Bi doping endowed the characteristic emission (5D4→7F6-3) of Tb3+ ions with a new excitation peak at 368 nm rather than the single characteristic excitation at 290 nm of Tb3+. By controlling Tb3+ ions concentration, the emission colors of Bi-doped Cs2Ag(In1−xTbx)Cl6 NCs could be continuously tuned from green to orange, through the efficient energy-transfer channel from self-trapped excitons to Tb3+ ions. Our study provides the salient features of the material design of lead-free perovskite NCs and to expand their luminescence applications. |
| Keywords: | doping energy transfer perovskite nanocrystals photoluminescence terbium |