Chen Yuanjie, Wu Jie, Zhang Shuai, Zhu Xiaoshan, Zou Bingsuo, Zeng Ruosheng
School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China.
Department of Electrical and Biomedical Engineering, University of Nevada-Reno, Reno, Nevada 89557, United States.
J Phys Chem Lett. 2023 Aug 10;14(31):7108-7117. doi: 10.1021/acs.jpclett.3c01825. Epub 2023 Aug 2.
Halide perovskites have attracted considerable interest due to their excellent photoelectric properties. In this study, we synthesized Sb-doped CsNaTbCl using a solvothermal method to investigate its tunable photoelectric properties and low toxicity. Upon Sb ion doping, the photoluminescence yield (PLQY) of CsNaTbCl significantly increased from ∼1.7 to ∼47%. The introduced Sb ions with ns electronic configuration expanded the rare-earth element's absorption cross section, broke intrinsic forbidden transitions, and suppressed nonradiative recombination. Additionally, the codoping of Sb and Mn facilitated efficient energy transfer, resulting in highly efficient photoluminescence. The PLQY of 1%Sb,3%Mn:CsNaTbCl reached a remarkable 85.8%, marking the highest reported value for rare-earth double perovskites in the visible light region. This study highlights the vital role of Sb(III) doping as a bridging agent to enhance the emission in rare-earth double perovskites.
卤化物钙钛矿因其优异的光电性能而备受关注。在本研究中，我们采用溶剂热法合成了Sb掺杂的CsNaTbCl，以研究其可调谐的光电性能和低毒性。Sb离子掺杂后，CsNaTbCl的光致发光产率（PLQY）从约1.7%显著提高到约47%。引入的具有ns电子构型的Sb离子扩大了稀土元素的吸收截面，打破了本征禁戒跃迁，并抑制了非辐射复合。此外，Sb和Mn的共掺杂促进了有效的能量转移，从而产生高效的光致发光。1%Sb,3%Mn:CsNaTbCl的PLQY达到了显著的85.8%，这是稀土双钙钛矿在可见光区域报道的最高值。本研究突出了Sb(III)掺杂作为桥联剂在增强稀土双钙钛矿发光方面的重要作用。
