The energy transfer mechanism in Pr3+ and Yb3+ codoped β-NaLuF4 nanocrystals

文献情報

出版日 2014-04-03

DOI 10.1039/C4CP01184H

インパクトファクター 3.676

著者

Jiahua Zhang, Zhendong Hao, Xia Zhang, Guohui Pan, Yongshi Luo, Shaozhe Lü, Haifeng Zhao

原文を見る

要旨

The Pr3+ and Yb3+ codoped β-NaLuF4 hexagonal nanoplates with a size of 250 nm × 110 nm were synthesized by a solvothermal process. X-Ray diffraction and scanning electron microscopy were used to characterize the crystal structure and morphology of the materials. The visible and near infrared spectra as well as the decay curves of Pr3+:3P0 level were used to demonstrate the energy transfer from Pr3+ ions to Yb3+ ions. The downconversion phenomenon has been observed under the direct excitation of the 3P2 level of Pr3+. According to the analysis of the dependence of the initial transfer rate upon Yb3+ ion concentration, it indicates that the ET from Pr3+ ions to Yb3+ ions is only by a two-step ET process when the Yb3+ concentration is very low; however, with the increase of the Yb3+ concentration, a cooperative ET process occurs and gradually increases; when the Yb3+ ion concentration increases to 20 mol%, the ET from Pr3+ ions to Yb3+ ions occurs only by the cooperative ET process. When the doping concentration of Yb3+ ions reaches 20 mol% at a fixed concentration of Pr3+ ions (1 mol%), the theoretical quantum efficiency is 192.2%, close to the limit of 200%. The current research has great potential in improving the conversion efficiency of silicon solar cells.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.