Direct ambient synthesis of cerium-sensitized Cs3TbCl6 microcrystals with near-unity photoluminescence quantum yield and robust stability for white lighting
Abstract
Recently, lead-free zero-dimensional Cs3TbCl6 (CTC) microcrystals have shown great potential for applications in light-emitting diodes. However, two major limitations of CTC are their low absorption coefficient and harsh preparation. In this study, Ce3+ with 4f–5d orbital coupling was used to dope CTC, enabling the excitation band to shift from UV-B to UV-A and elevating the photoluminescence quantum yield from 33.52% to 96.43%. In addition, cerium-sensitized CTC microcrystals (MCs) with different dopant ratios were obtained to study the energy transfer process from Ce3+ to Tb3+, which were prepared via a simple monosolvent ethanol-assisted recrystallization method at room temperature. Finally, we used cerium-sensitized CTC MCs with excellent stability to fabricate the white light-emitting diodes. This work not only offers a deep understanding of competitive energy transfer in zero-dimensional lanthanide-based metal halides, but also presents a direct ambient synthesis strategy of highly emissive and robustly stable phosphor for white light illumination.
Article Details
Journal Info
The Journal of Chemical Physics
American Institute of Physics
Authors (14)
Yanqing Zu
Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences 1 , Baoji 721016,
Lixia Jing
Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences 1 , Baoji 721016,
Binglin Zeng
Department of Chemistry
Jiaxin Wang
Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry
Yicong Zheng
Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences 1 , Baoji 721016,
Run Gan
Mengyu Chen
Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences 1 , Baoji 721016,
Kemeng Guo
Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences 1 , Baoji 721016,
Hongyan Gao
Peitao Liu
Institute of Metal Research, Shenyang National Laboratory for Materials Science, Chinese Academy of Sciences
Xiaodong Li
Hefei National Research Center for Physical Sciences at the Microscale, State Key Laboratory of Precision and Intelligent Chemistry
Zengming Liu
Shaanxi Weide Hongye Electronic Technology Company Limited 2 , Baoji 721008,
Ailing Feng
Zhaoxin Wu