Yadav Priyesh, Khurana Swati, Sapra Sameer
Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
Nanotechnology. 2022 Jul 25;33(41). doi: 10.1088/1361-6528/ac7ed0.
The layered hybrid double perovskites emerged as excellent semiconductor materials owing to their environment compatibility and stability. However, these materials are weakly luminescent, and their photoluminescence (PL) properties can be modulated via doping. While Mndoping in perovskites is well known, but to the best of our knowledge the doping of Mnin layered double perovskites (LDPs) is yet to be explored. Herein, for the first time, we demonstrate the doping of Mnin hybrid inorganic-organic two-dimensional (2D) LDPs, (BA)AgBiBr(BA = n-butyl amine) via a simple solid-state mechanochemical route. The powder x-ray diffraction pattern, and electron paramagnetic resonance analysis confirm the successful incorporation of Mnions inside (BA)AgBiBrlattice. The Mndoped 2D LDP shows energy transfer from host excitons to d-electrons of Mnions, which results in red-shifted broad Mnemission band centered at 625 nm, attributed to theTtoAinternal transition. This work opens up new possibilities to dope metal ions in 2D LDPs to tune the optical as well as magnetic properties.
层状混合双钙钛矿因其环境兼容性和稳定性而成为优异的半导体材料。然而，这些材料的发光较弱，其光致发光（PL）特性可通过掺杂来调节。虽然钙钛矿中的锰掺杂是众所周知的，但据我们所知，层状双钙钛矿（LDPs）中的锰掺杂尚未得到探索。在此，我们首次通过简单的固态机械化学路线证明了在混合无机-有机二维（2D）LDPs（BA）AgBiBr（BA = 正丁胺）中掺杂锰。粉末X射线衍射图谱和电子顺磁共振分析证实了锰离子成功掺入（BA）AgBiBr晶格中。锰掺杂的二维LDP显示出从主体激子到锰离子d电子的能量转移，这导致以625 nm为中心的红移宽锰发射带，归因于T到A的内部跃迁。这项工作为在二维LDP中掺杂金属离子以调节光学和磁学性质开辟了新的可能性。
