Chen Yuanjie, Zeng Ruosheng, Wei Qilin, Zhang Shuai, Luo Binbin, Chen Canxu, Zhu Xiaoshan, Cao Sheng, Zou Bingsuo, Zhang Jin Zhong
School of Physical Science and Technology, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China.
Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong 515063, China.
J Phys Chem Lett. 2022 Sep 15;13(36):8529-8536. doi: 10.1021/acs.jpclett.2c02491. Epub 2022 Sep 6.
ABBX double perovskites are promising materials due to their outstanding photoelectronic properties and excellent stability in the environment. Herein, we synthesized Mn:CsNaTbCl with dual emission through a solvothermal method for the first time. Mn:CsNaTbCl double perovskites exhibit excellent environmental stability and high photoluminescence quantum yields (PLQYs). The CsNaTbCl was successfully doped with Mn in two modes: at Mn-feeding concentrations below 1%, Mn first tend to insert into the interstitial void, but if the Mn-feeding concentration exceeds 1%, Mn will further substitute Na site of the CsNaTbCl lattice and thus both two doping modes coexist. After Mn doping, efficient energy transfer from the D level of Tb ions to the T level of Mn ions occurs, resulting in tunable dual emission from the TbD → F transition and MnT → A transition. Further, LED based on the Mn:CsNaTbCl double perovskites exhibits excellent performance and stability. This work demonstrates a strategy to achieve novel lanthanide-based double perovskites with potential applications in photonics.
ABBX双钙钛矿因其出色的光电性能和在环境中的优异稳定性而成为有前途的材料。在此，我们首次通过溶剂热法合成了具有双发射的Mn:CsNaTbCl。Mn:CsNaTbCl双钙钛矿表现出优异的环境稳定性和高光致发光量子产率（PLQYs）。CsNaTbCl成功地以两种模式掺杂了Mn：在Mn进料浓度低于1%时，Mn首先倾向于插入间隙空位，但如果Mn进料浓度超过1%，Mn将进一步取代CsNaTbCl晶格中的Na位点，因此两种掺杂模式共存。Mn掺杂后，发生了从Tb离子的D能级到Mn离子的T能级的有效能量转移，导致了从TbD→F跃迁和MnT→A跃迁的可调谐双发射。此外，基于Mn:CsNaTbCl双钙钛矿的发光二极管表现出优异的性能和稳定性。这项工作展示了一种实现新型镧系双钙钛矿的策略，其在光子学领域具有潜在应用。
